Release Notes for the Catalyst 4500 Series Switch, Release IOS-XE 3.2.x SG
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Table of Contents
Release Notes for the Catalyst 4500E Series Switch, Cisco IOS XE Release 3.2.xSG
Cisco IOS Software Packaging for IOS 3.2.xSG
Features Not Supported on the Cisco Catalyst 4500E Series Switch
Catalyst 4500E Series Switch Cisco Classic IOS XE Release Strategy
Cisco IOS Software Migration Guide
Supported Hardware on the Catalyst 4500E Series Switch
Supported E Series Hardware on Cisco IOS XE Release 3.2.0SG
New Software Features in Release IOS XE 3.2.1SG
New Hardware Features in Release IOS XE 3.2.1SG
New Software Features in Release IOS XE 3.2.0SG
New Hardware Features in Release IOS XE 3.2.0SG
Cisco IOS XE to Cisco IOS Version Number Mapping
Identifying an +E Chassis and ROMMON
Resolved Caveats in Cisco IOS XE Release 3.2.11SG
Open Caveats for Cisco IOS XE Release 3.2. 10SG
Resolved Caveats in Cisco IOS XE Release 3.2.10SG
Resolved Caveats for Cisco IOS XE Release 3.2.9SG
Resolved Caveats for Cisco IOS XE Release 3.2.8SG
Open Caveats for Cisco IOS XE Release 3.2.7SG
Resolved Caveats for Cisco IOS XE Release 3.2.7SG
Open Caveats for Cisco IOS XE Release 3.2.6SG
Resolved Caveats for Cisco IOS XE Release 3.2.6SG
Open Caveats for Cisco IOS XE Release 3.2.5SG
Resolved Caveats for Cisco IOS XE Release 3.2.5SG
Open Caveats for Cisco IOS XE Release 3.2.4SG
Resolved Caveats for Cisco IOS XE Release 3.2.4SG
Open Caveats for Cisco IOS XE Release 3.2.3SG
Resolved Caveats for Cisco IOS XE Release 3.2.3SG
Open Caveats for Cisco IOS XE Release 3.2.2SG
Resolved Caveats for Cisco IOS XE Release 3.2.2SG
Open Caveats for Cisco IOS XE Release 3.2.1SG
Resolved Caveats for Cisco IOS XE Release 3.2.1SG
Open Caveats for Cisco IOS XE Release 3.2.0SG
Resolved Caveats for Cisco IOS XE Release 3.2.0SG
Troubleshooting at the System Level
Obtaining Documentation and Submitting a Service Request
Release Notes for the Catalyst 4500E Series Switch, Cisco IOS XE Release 3.2.xSG
IOS XE 3.2.11SG—October 18, 2016
Prior Release
IOS XE 3.2.10SG, IOS XE 3.2.9SG, IOS XE 3.2.8SG, IOS XE 3.2.7SG, IOS XE 3.2.6,SG IOS XE 3.2.5SG, IOS XE 3.2.4SG, IOS XE 3.2.3SG, IOS XE 3.2.2SG, IOS XE 3.2.1SG, IOS XE 3.2.0SGThis release note describes the features, modifications, and caveats for the Cisco IOS XE 3.2.0SG software on the Catalyst 4500E series switch with Supervisor Engine 7-E.
Cisco IOS XE Software Release 3.1.0 SG introduced primary hardware and software innovations including:
- Support for next-generation Cisco® Catalyst® 4500E Series system Supervisor Engine 7-E and associated line cards
- Deep application and security visibility and policy controls with Flexible Netflow and Embedded Event Manager (EEM) integration
- Extensible operating system with Cisco IOS XE Software
- Simplified software management and compliance audit with Cisco software activation licensing
Support for Cisco IOS XE Release 3.2.0SG, the default image, follows the standard Cisco Systems® support policy, available at
http://www.cisco.com/en/US/products/products_end-of-life_policy.htmlFor more information on the Catalyst 4500E series switches, visit the following URL:
http://www.cisco.com/go/cat4500/docsContents
This publication consists of these sections:
- Cisco IOS Software Packaging for IOS 3.2.xSG
- Catalyst 4500E Series Switch Cisco Classic IOS XE Release Strategy
- Support
- System Requirements
- New and Changed Information
- Cisco IOS XE to Cisco IOS Version Number Mapping
- Upgrading the System Software
- Limitations and Restrictions
- Caveats
- Troubleshooting
- Notices
Cisco IOS Software Packaging for IOS 3.2.xSG
The Enterprise Services image supports all Cisco Catalyst 4500 Series software features based on Cisco IOS Software, including enhanced routing.
The IP Base image supports Open Shortest Path First (OSPF) for Routed Access and Enhanced Interior Gateway Routing Protocol (EIGRP) "limited" Stub Routing, and RIPv1/v2. The IP Base image does not support enhanced routing features such as Nonstop Forwarding/Stateful Switchover (NSF/SSO), BGP, Intermediate System-to-Intermediate System (IS-IS), Internetwork Packet Exchange (IPX), AppleTalk, Virtual Routing Forwarding (VRF-lite), GLBP, and policy-based routing (PBR).
LAN Base image is primarily focused on customer access and Layer 2 requirements and therefore many of the IP Base features are not required. The IP upgrade image is available if at a later date you require some of those features.
Starting with Cisco IOS XE 3.2.0SG, support for HSRP v2 IPV6 has been extended from Enterprise Services to IP Base.
- Feature Support by Image Type
- Features Not Supported on the Cisco Catalyst 4500E Series Switch
- Orderable Product Numbers
Feature Support by Image Type
Table 1 is a detailed list of features supported on Catalyst 4500E Supervisor Engine 7-E running Cisco IOS Software Release 3.2.0SG categorized by image type. Please visit Feature Navigator for package details:
http://tools.cisco.com/ITDIT/CFN/
Table 1 LAN Base/IP Base/EnterpriseServices Image Support on Cisco Catalyst 4500E Supervisor Engine 7-E
BGP Increased Support of Numbered as-path Access Lists to 500
CFM/IEEE 802.1ag - D8.1 standard Compliant CFM, Y.1731 multicast LBM / AIS / RDI / LCK, IP SLA for Ethernet
Class Based Ethernet CoS Matching & Marking (802.1p & ISL CoS)
IEEE 802.1s - Multiple Spanning Tree (MST) Standard Compliance
IEEE 802.1t1
IEEE 802.3ad Link Aggregation (LACP) Port-Channel Standalone Disable
IGMP Version 3 - Explicit Tracking of Hosts, Groups, and Channels
IP Multicast Load Splitting - Equal Cost Multipath (ECMP) using S, G and Next-hop
IPv6 Multicast: Multicast Listener Discovery (MLD) Protocol, Versions 1 and 2
IPv6 Multicast: RPF Flooding of Bootstrap Router (BSR) Packets
IPv6 Services: Cisco Discovery Protocol (CDP) - IPv6 Address Family Support for Neighbor Information
IPv6 Switching: CEFv6 Switched Automatic IPv4-compatible Tunnels
IPv6 Switching: CEFv6 Switched Configured IPv6 over IPv4 Tunnels
Network Time Protocol (NTP) primary
(formerly known as Network Time Protocol (NTP) master)Yes2
Yes 2
Yes 2
Yes 2
Yes 2
Yes 2
Yes 2
Yes 2
Yes3
Yes 2
Yes 2
Yes 2
RADIUS Attribute 44 (Accounting Session ID) in Access Requests
Source Specific Multicast (SSM) - IGMPv3,IGMP v3lite, and URD
1.EEE 802.1t—An IEEE amendment to IEEE 802.1D that includes extended system ID, long path cost, and PortFast.
For information on MiBs support, please refer to this URL:
http://ftp.cisco.com/pub/mibs/supportlists/cat4000/cat4000-supportlist.html
Features Not Supported on the Cisco Catalyst 4500E Series Switch
The following features are not supported on a Catalyst 4500E Series Switch with Supervisor Engine 7-E:
- 802.3ah
- ANCP
- Autosmartport
- CBQoS MIB
- Cisco Network Assistant
- CISCO-IETF-IP-FORWARD-MIB
- CISCO-IETF-IP-MIB
- Flex Links+(VLAN Load balancing)
- HOT Ice
- ID4.1 802.1X User Distribution
- IP4.1 ACL Policy Enhancements
- IP4.1 MAC MOve and Replace
- IP4.1 NEAT
- IP4.1 RADIUS CoA
- IPSG for Static Hosts
- IPUnnumbered
- IPv6 Intf Stats and MIB
- IPv6 PACL and RACL
- IPv6 RA Guard (host mode only)
- IS-IS v4, v6
- Layer 2 Control Packet QoS
- Link Debug
- Link State Tracking
- LLDP HA
- LLDP MED MIB
- Management Port
- NMSP
- PPPoE
- PVL
- QnQ and L2PT
- REP
- Subsecond UDLD
- SwQoS
- TACACS Aware VRF
- VLAN Translation
- WCCP Version
- Y.1731 (AIS and RDI)
Orderable Product Numbers
Catalyst 4500E Series Switch Cisco Classic IOS XE Release Strategy
Note These recommendations are up to date at the time of release note publications. For the latest recommendations, please consult the release notes for the most recent software version supporting this hardware.
Cisco IOS Release 3.2.0 train offers the latest features for the Catalyst 4500 Supervisor Engine 7-E. If you need to need the latest hardware support and software features you should migrate to Cisco IOS Release 3.2.0SG.
For more information on the Catalyst 4500 series switches, visit the following URL:
http://www.cisco.com/go/cat4500/docsCisco IOS Software Migration Guide
Figure 1 displays the one active train, 3.2.0SG.
Figure 1 Software Release Strategy for the Catalyst 4500 Series Switch
Summary of Migration Plan
Customers requiring the latest Cisco Catalyst 4500 Series hardware and software features should migrate to Cisco IOS Software Release 3.2.0SG, which will be an extended maintenance release.
Support
Support for Cisco IOS Software Release 15.0(2)SG follows the standard Cisco Systems® support policy, available at
http://www.cisco.com/en/US/products/products_end-of-life_policy.htmlSupport
Support for Cisco IOS Software Release 3.2.0SG follows the standard Cisco Systems® support policy, available at
http://www.cisco.com/en/US/products/products_end-of-life_policy.htmlSystem Requirements
This section describes the system requirements:
- Supported Hardware on the Catalyst 4500E Series Switch
- Supported E Series Hardware on Cisco IOS XE Release 3.2.0SG
- New and Changed Information
Supported Hardware on the Catalyst 4500E Series Switch
Table 3 lists the hardware supported on the Catalyst 4500E Series Switch.
Table 3 Supported Hardware on Cisco Catalyst 4500E Supervisor Engine 7-E
Catalyst 4500E-series switch Supervisor Engine 7-E
Note This engine is supported on E-series, R-E, and R+E chassis.
18-port 1000BASE-X (GBIC) Gigabit Ethernet server switching module
12-port 1000BASE-T Gigabit Ethernet and 2-GBIC ports switching module
24-port 10/100/1000BASE-T Gigabit Ethernet RJ-45 switching module
48-port 1000BASE-LX (small form-factor pluggable) Gigabit Ethernet fiber optic interface switching module
6-port Alternately-Wired 10/100/1000BASE-T Catalyst 4500 series Power over Ethernet (PoE) 802.3af or 1000BASE-X SFP
24-port 10/100/1000BASE-T RJ-45 Catalyst 4500 series PoE 802.3af
48-port 10/100/1000BASE-T RJ-45 Catalyst 4500 series PoE 802.3af
80 ports with Gigabit compact SFP (4:1 oversubscribed); 40 modules of Gigabit SFP line card (1000BaseX), providing 24 gigabits per-slot capacity (SFP optional) (2:1 oversubscribed)
12-port 1000BASE-X (small form factor pluggable) module with jumbo frame support
Non-blocking 24-port 1000BASEX (small form factor pluggable) module
48 port 10/100/1000BT with 2 to 1 oversubscription and jumbo frame support
48 port 10/100/1000 Mb with 2 to 1 oversubscription PoE 802.3af providing up to 20 Watts power/port
48 port 10/100/1000 Mb with 2 to 1 oversubscription PoE 802.3at providing up to 30 Watts power/port
48-port 10/100/1000 line card nonblocking PoE 802.3at providing up to 30 Watts power/port
48-port 10/100/1000 line card nonblocking PoE 802.3at and 60 watt UPoE PoE linecard with Ethernet Energy Efficient feature.
48-port 10/100/1000 nonblocking line card with the Ethernet Energy Efficient feature
24-port 100BASE-FX Fast Ethernet MT-RJ multimode fiber switching module
48-port 100BASE-FX Fast Ethernet MT-RJ multimode fiber switching module
48-port 100BASE-LX10 Fast Ethernet MT-RJ single-mode fiber switching module
24-port 10/100BASE-TX RJ-45 Cisco Catalyst 4500 series PoE 802.3af
32-port 10/100 Fast Ethernet RJ-45, plus 2-port 1000BASE-X (GBIC) Gigabit Ethernet switching module
48-port 10/100BASE-T RJ-45 Cisco Catalyst 4500 series PoE 802.3af
48-port 10/100 Fast Ethernet RJ-21 Cisco Catalyst 4500 series PoE 802.3af telco
32-port 10/100 Fast Ethernet RJ-45 modular uplink switching module
1000BASE-BX10-D small form-factor pluggable module
For DOM support, see Table 6.1000BASE-BX10-U small form-factor pluggable module
For DOM support, see Table 6.bvCWDM small form-factor pluggable module (See Table 4 for a list of supported wavelengths.)
For DOM support, see Table 6.10GBASE-LR X2 transceiver module for SMF, 1310-nm wavelength, SC duplex connector
10GBASE-ER X2 transceiver module for SMF, 1550-nm wavelength, SC duplex connector
10GBASE-CX4 X2 transceiver module for CX4 cable, copper, Infiniband 4X connector
10GBASE-LX4 X2 transceiver module for MMF, 1310-nm wavelength, SC duplex connector
10GBASE-LRM X2 transceiver module for MMF, 1310-nm wavelength, SC duplex connector
10GBASE-SR X2 transceiver module for MMF, 850-nm wavelength, SC duplex connector
10GBASE-ZR X2 transceiver module for SMF, 1550 nm wavelength up to 80 km. DOM is not supported.
10GBASE-ZR X2 transceiver module for SMF, 32 nontunable ITU 100-GHz wavelengths up to 80 km are supported. DOM is supported. Dual SC/PC connectors are supported.
Hot-swappable input/output (I/O) converter module that fits into a 10-Gigabit Ethernet X2 slot on a switch or line card module. Hosts one 10-Gigabit Ethernet SFP+ transceiver module.
CWDM gigabit interface converter (See Table 4 for a list of supported wavelengths.)
Dense Wavelength-Division Multiplexing ITU 100-Ghz grid 15xx.yy nm GBIC.
For DOM support, see Table 6.Catalyst 4500 series switch 1000 Watt AC power supply for chassis 4503, 4506, and 4507R (data only)
Catalyst 4500 series switch 1400 Watt DC triple input power supply (data-only)
Catalyst 4500 series switch 1400 Watt DC power supply with integrated PEM
Catalyst 4500 series switch 1400 Watt AC power supply (data-only)
Catalyst 4500 series switch 1300 Watt AC power supply with integrated voice for chassis 4503, 4506, and 4507R
Catalyst 4500 series switch 2800 Watt AC power supply with integrated voice (data and PoE) for chassis 4503, 4506, and 4507R
Catalyst 4500 series switch 4200 Watt AC dual input power supply with integrated voice (data and PoE)
Catalyst 4500 series switch auxiliary power shelf (25-slot), including one PWR-4502
Catalyst 4500 series switch auxiliary power shelf redundant power supply
Table 4 briefly describes the supported CWDM wavelengths in the Catalyst 4500E Series Switch.
Table 5 briefly describes the supported DWDM wavelengths in the Catalyst 4500E Series Switch.
Table 6 briefly describes the DOM support on the Catalyst 4500E Series Switch.
Supported E Series Hardware on Cisco IOS XE Release 3.2.0SG
Cisco IOS XE Release 3.2.0SG supports the next-generation high-performance E Series Supervisor Engine 7-E with CenterFlex technology and E-Series line cards and chassis. A brief list of primary E-Series hardware supported by Cisco IOS XE Release 3.2.0SG is shown in Table 7 .
New and Changed Information
These sections describe the new and changed information for the Catalyst 4500 series switch running Cisco IOS software:
- New Software Features in Release IOS XE 3.2.1SG
- New Hardware Features in Release IOS XE 3.2.1SG
- New Software Features in Release IOS XE 3.2.0SG
- New Hardware Features in Release IOS XE 3.2.0SG
Note Release IOS XE 3.1.1 is a rebuild of Release IOS XE 3.1.0 with only 2 bug fixes included.
New Software Features in Release IOS XE 3.2.1SG
Release IOS XE 3.2.1SG provides the following new software on the Catalyst 4500 series switch:
New Hardware Features in Release IOS XE 3.2.1SG
Release IOS XE 3.2.1SG provides the following new hardware on the Catalyst 4500 series switch.
New Software Features in Release IOS XE 3.2.0SG
Release IOS XE 3.2.0SG provides the following new software on the Catalyst 4500 series switch:
- 2-way Community Private VLANs ("Configuring Private VLANs" chapter)
- Call Home message using dedicated interface (“Configuring Call Home” chapter)
- CPU Optimization for Layer 3 Multicast Control Packets (“Configuring Network Security with ACLs” chapter)
- Critical Authorization for Voice and Data (“Configuring 802.1X Port-Based Authentication 802.1X” chapter)
- Duplication Location Reporting Issue
For information on the reporting issue, refer to the following URL:
http://www.cisco.com/en/US/docs/ios/ netmgmt/configuration/guide/nm_cdp_discover.html
- IEEE 802.1ag - D8.1 standard Compliant CFM, Y.1731 multicast LBM / AIS / RDI / LCK, IP SLA for Ethernet (“Configuring Ethernet OAM and CFM” chapter)
- Multi-authentication and VLAN Assignment (“Configuring 802.1X Port-Based Authentication
For information on configuring CDP Location TLV, refer to the following URL:
http://www.cisco.com/en/US/docs/ios/ netmgmt/configuration/guide/nm_cdp_discover.html
New Hardware Features in Release IOS XE 3.2.0SG
Release IOS XE 3.2.0SG provides the following new hardware on the Catalyst 4500 series switch:
- SFP-10G-ER—10GBASE-ER SFP+ transceiver module for SMF, 1550-nm, LC duplex connector
- SFP-10G-ZR—10GBASE-ZR SFP+ transceiver module for SMF, 1550-nm, LC duplex connector
- DWDM SFP Transceivers (8 additional wavelengths) (dual LC/PC connector):
– DWDM-SFP-6141= (Cisco 1000BASE-DWDM SFP 1561.42 nm)
– DWDM-SFP-5736= (Cisco 1000BASE-DWDM SFP 1557.36 nm)
– DWDM-SFP-5332= (Cisco 1000BASE-DWDM SFP 1553.33 nm)
– DWDM-SFP-4931= (Cisco 1000BASE-DWDM SFP 1549.32 nm)
– DWDM-SFP-4532= (Cisco 1000BASE-DWDM SFP 1545.32 nm)
– DWDM-SFP-4134= (Cisco 1000BASE-DWDM SFP 1541.35 nm)
Cisco IOS XE to Cisco IOS Version Number Mapping
As Table 8 shows, each version of Cisco IOS XE has an associated Cisco IOS version:
Upgrading the System Software
If you are upgrading to 3.2.0SG, you must upgrade your ROMMON to 15.0(1r)SG2.
You can upgrade a ROMMON image either through a console or telnet.
If they have dual supervisors, first upgrade your software to 3.2.0SG, then upgrade your ROMMON to 15.0(1r)SG2 to avoid the resets uplinks issue (CSCtj54375).
Identifying an +E Chassis and ROMMON
An +E chassis is identified by a FRU minor value in the chassis' idprom.
When supervisor engine 1 (sup1) is in ROMMON and supervisor engine 2 (sup2) is in IOS, only sup2 can read the idprom contents of chassis’ idprom. Chassis type is displayed as “+E” in the output of the show version command. Conversely, sup1 can only display the chassis type as “E.”
When both sup1 and sup2 are in ROMMON, both engines can read the chassis’ idprom. Chassis type is displayed correctly as “+E” in the output of the show version command.
When both sup1 and sup2 are in IOS, both engines can read the chassis’ idprom. Chassis type is displayed correctly as “+E” in the output of the show version command.
Limitations and Restrictions
These sections list the limitations and restrictions for the current release of Cisco IOS software on the Catalyst 4500E series switch.
- The supervisor engine front-panel management port (FastEthernet1 interface) is not supported.
- The WS-X4712-SFP+E module is not supported in the WS-C4507R-E or WS-C4510R-E chassis and does not boot. This module is supported in the WS-C4503-E, WS-C4506-E, WS-C4507R+E, and WS-C4510R+E chassis.
- 802.1q tunneling and related features are not supported.
- More than 16K QoS policies can be configured in software. Only the first 16K are installed in hardware.
- Adjacency learning (through ARP response frames) is restricted to roughly 1000 new adjacencies per second, depending on CPU utilization. This should only impact large networks on the first bootup. After adjacencies are learned they are installed in hardware.
- Multicast fastdrop entries are not created when RPF failure occurs with IPv6 multicast traffic. In a topology where reverse path check failure occurs with IPv6 multicast, this may cause high CPU utilization on the switch.
- The SNMP ceImageFeature object returns a similar feature list for all the three license levels (LAN Base, IP Base, and EntServices). Although the activated feature set for a universal image varies based on the installed feature license, the value displayed by this object is fixed and is not based on the feature license level.
- Standard TFTP implementation limits the maximum size of a file that can be transferred to 32 MB. If ROMMON is used to boot an IOS image that is larger than 32 MB, the TFTP transfer fails at the 65,xxx datagram.
TFTP numbers its datagrams with a 16 bit field, resulting in a maximum of 65,536 datagrams. Because each TFTP datagram is 512 bytes long, the maximum transferable file is 65536 x 512 = 32 MB. If both the TFTP client (ROMMON) and the TFTP server support block number wraparound, no size limitation exists.
Cisco has modified the TFTP client to support block number wraparound. So, if you encounter a transfer failure, use a TFTP server that supports TFTP block number wraparound. Because most implementations of TFTP support block number wraparound, updating the TFTP daemon should fix the issue.
The outputs of certain commands, such as show ip route and show access-lists, contain non-deterministic text. While the output is easily understood, the output text does not contain strings that are consistently output. A general purpose specification file entry is unable to parse all possible output.
While a general purpose specification file entry may not be possible, a specification file entry might be created that returns the desired text by searching for text that is guaranteed to be in the output. If a string is guaranteed to be in the output, it can be used for parsing.
For example, the output of the show ip access-lists SecWiz_Gi3_17_out_ip command is this:
The first line is easily parsed because access list is guaranteed to be in the output:
The remaining lines all contain the term host. As a result, the specification file may report the desired values by specifying that string. For example, this line
will produce the following for the first and second rules
and the following for the third statement
Request the output of the show running-config command using NETCONF and parse that output for the desired strings. This is useful when the desired lines contain nothing in common. For example, the rules in this access list do not contain a common string and the order (three permits, then a deny, then another permit), prevent the spec file entry from using permit as a search string, as in the following example:
The XML output of show running-config command includes the following, which can then be parsed programmatically, as desired:
<X-Interface> permit 0000.0000.ffef ffff.ffff.0000 0000.00af.bcef ffff.ff00.0000 appletalk</X-Interface>
- When attaching a existing policy-map (that is already applied to a control-port) to another front-panel port, the following message displays:
The policymap <policy-map name> is already attached to control-plane and cannot be shared with other targets.Workaround: Define a policy-map with a different name and then reattach. CSCti26172
- If the number of unique FNF monitors attached to target exceeds 2048 (one per target), a switch responds slowly:
– Decrease the number of monitors.
– Attach the same monitor to multiple targets. CSCti43798
- ciscoFlashPartitionFileCount object returns an incorrect file count for bootflash:, usb0:, slot0:, slaveslot0:, slavebootflash:, and slaveusb0:.
Workaround: Use the dir device command (for example, dir bootflash:) to obtain the correct file count. CSCti74130
- If multicast is configured and you make changes to the configuration, Traceback and CPUHOG messages are displayed if the following conditions exist:
– At least 10K groups and roughly 20K mroutes exist.
– IGMP joins with source traffic transit to all the multicast groups.
This is caused by the large number of updates generating SPI messages that must be processed by the CPU to ensure that the platform is updated with the changes in all the entries.
- When attaching a existing policy-map (that is already applied to a control-port) to another front-panel port, following message displays:
The policymap <policy-map name> is already attached to control-plane and cannot be shared with other targets.Workaround: Define a policy-map with a different name and then reattach. CSCti26172
- With traffic running, entering clear ip mroute * with larger number of mroutes and over 6 OIFs will cause Malloc Fail messages to display.
You cannot clear a large number of mroutes at one time when traffic is still running.
Workaround: Do not clear all mroutes at once.
- Although you can configure subsecond PIM query intervals on Catalyst 4500 platforms, such an action represents a compromise between convergence (reaction time) and a number of other factors (number of mroutes, base line of CPU utilization, CPU speed, processing overhead per 1 m-route, etc.). You must account for those factors when configuring subsecond PIM timers. We recommend that you set the PIM query interval to a minimum of 2 seconds. By adjusting the available parameters, you can achieve flawless operation; that is, a top number of multicast routes per given convergence time on a specific setup.
- With Cisco IOS Release XE 3.2.1SG, memory configuration is enabled:
This configuration had been removed erroneously in a prior release.
%AUTHMGR-7-RESULT: Authentication result 'success' from 'dot1x' for client (Unknown MAC) on Interface Gi5/39 AuditSessionID AC156241000000670001BC9.provided the following conditions apply:
– A switchport is configured with the following:
authentication event server dead action authorize...
authenticaton event server alive action reinitalize
– The RADIUS server was down previously, and a port without traffic (for example, a hub with no devices attached) was authorized into the inaccessible authentication bypass (IAB) VLAN without an associated MAC address.
The RADIUS server becomes available again, and the IAB-authorized port transitions to another state.
Caveats
Caveats describe unexpected behavior in Cisco IOS releases. Caveats listed as open in a prior release are carried forward to the next release as either open or resolved.
Note For the latest information on PSIRTS, refer to the Security Advisories on CCO at the following URL:
http://www.cisco.com/en/US/products/products_security_advisories_listing.html
Cisco Bug Search Tool
The Bug Search Tool (BST), which is the online successor to Bug Toolkit, is designed to improve the effectiveness in network risk management and device troubleshooting. The BST allows partners and customers to search for software bugs based on product, release, and keyword, and aggregates key data such as bug details, product, and version. The tool has a provision to filter bugs based on credentials to provide external and internal bug views for the search input.
To view the details of a caveat listed in this document:
1. Access the BST (use your Cisco user ID and password) at https://tools.cisco.com/bugsearch/ .
Resolved Caveats in Cisco IOS XE Release 3.2.11SG
Use the Bug Search Tool to view the details of a caveat listed in this section:
Open Caveats for Cisco IOS XE Release 3.2.10SG
This section lists the open caveats for Cisco IOS XE Release 3.2.9SG:
- The Cisco IOS XE software for the Cisco Catalyst 4500 Series switches includes a version of Bash that is affected by the vulnerabilities identified by the following Common Vulnerability and Exposures (CVE) IDs:
Cisco has analyzed this vulnerability and concluded that while the previously listed products may run a vulnerable version of Bash, there are no exploitation vectors present - therefore, those products are not impacted.
Additional details about those vulnerabilities can be found at http://cve.mitre.org/cve/cve.html
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
Resolved Caveats in Cisco IOS XE Release 3.2.10SG
- Certain modules X4748 modules for the 4500 switching system unexpectedly drop traffic, considering them giants ( any Ethernet packet that is greater than 1518 bytes is considered a giant ). Affected modules include:
The problem is seen only on modules running Cisco IOS Release IOS-XE 03.02.n.SG.
Certain revisions of the X4748 module display this behavior when running on IOS-XE version 03.02.n.SG. Not all X4748 modules will present this behavior, and it will not show up on newer versions of IOS-XE like 03.04.n.SG or 03.06.n.E.Workaround : Increasing the MTU on an affected interface to 1518 or higher will allow the traffic through. Upgrading to an IOS-XE version where this issue is not present will resolve the issue. CSCus15382
Resolved Caveats for Cisco IOS XE Release 3.2.9SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.9SG:
- The Cisco IOS Software network address translation (NAT) feature contains multiple denial of service (DoS) vulnerabilities in the translation of the following protocols:
– NetMeeting Directory (Lightweight Directory Access Protocol, LDAP)
– Session Initiation Protocol (Multiple vulnerabilities)
All the vulnerabilities described in this document are caused by packets in transit on the affected devices when those packets require application layer translation. Cisco has released free software updates that address these vulnerabilities.
This advisory is posted at: http://www.cisco.com/warp/public/707/cisco-sa-20110928-nat.shtml . CSCtd10712
- The Cisco IOS Software implementation of the virtual routing and forwarding (VRF) aware network address translation (NAT) feature contains a vulnerability when translating IP packets that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
Cisco has released free software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130327-nat
Note Note: The March 27, 2013, Cisco IOS Software Security Advisory bundled publication includes seven Cisco Security Advisories. All advisories address vulnerabilities in Cisco IOS Software. Each Cisco IOS Software Security Advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all Cisco IOS Software vulnerabilities in the March 2013 bundled publication.
Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at the following link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar13.html CSCtg47129
Workaround: None - You cannot configure the event4 exit-value. CSCtl70569
- The Cisco IOS Software Internet Key Exchange (IKE) feature contains a denial of service (DoS) vulnerability. Cisco has released free software updates that address this vulnerability. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-ike
Note Note: The March 28, 2012, Cisco IOS Software Security Advisory bundled publication includes nine Cisco Security Advisories. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the March 2012 bundled publication.
Individual publication links are in "Cisco Event Response: Semi-Annual Cisco IOS Software Security Advisory Bundled Publication" at the following link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar12.html . CSCts38429
Crash is observed in the following conditions -
– router reload / LC OIR with images after RLS10.
– traffic flows through the ES20 interface
– mac-address-table limit CLI is configured.
Note Note: The March 28, 2012, Cisco IOS Software Security Advisory bundled publication includes nine Cisco Security Advisories. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the March 2012 bundled publication.
Individual publication links are in "Cisco Event Response: Semi-Annual Cisco IOS Software Security Advisory Bundled Publication" at the following link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar12.html
Workaround: Remove mac-address-table limit. CSCtt28573
- The Cisco IOS Software implementation of the Network Address Translation (NAT) feature contains two vulnerabilities when translating IP packets that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
Cisco has released free software updates that address these vulnerabilities. There are no workarounds to mitigate these vulnerabilities. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140326-nat
Note The March 26, 2014, Cisco IOS Software Security Advisory bundled publication includes six Cisco Security Advisories. All advisories address vulnerabilities in Cisco IOS Software. Each Cisco IOS Software Security Advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all Cisco IOS Software vulnerabilities in the March 2014 bundled publication.
Individual publication links are in Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication at the following link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar14.html . See published Cisco Security Advisory. CSCue00996
- Minor or major temperature alarms are reported in the syslog along with the following DATACORRUPTION logs:
Aug 5 15:54:30.972 Buc: C6KENV-SP-4-MINORTEMPALARM interface 10/0 outlet temperature crossed threshold #1(=60C). It has exceeded normal operating temperature range.The symptom is observed on ES+ series linecards of Cisco 7600 Series Routers.
This happens when you continuously reload the standby switch. The client, that is, the active side cannot reach the standby side, and while returning an error, the FD is not released and exhausts FDs. The maximum number of allowed FDs is 128. When this limit is reached, additional files cannot be opened.
Workaround: Reload the switch. CSCug77784
- One or more interfaces on WS-X4748-RJ45V+E stop receiving traffic, making the interface unusable even after entering the shutdown and no shutdown interface configuration commands. The show interface privileged EXEC command indicates that the interface still sends data, but traffic is only unidirectional.
– Reseat the line card (or hardware mod reset)
Both are only temporary workarounds; the failure continues to resurface. CSCui36462
- A PoE device connected to an interface on module WS-X4748-UPOE+E will not power up. The interface will stay down or disconnected. entering the shutdown and no shutdown interface configuration commands has no effect.
Any release prior to Cisco IOS Release 3.2.9SG, 3.4.4SG, and 3.6.0E (3.5.0E and 3.5.1E also have the issue.
Workaround: Enter the test cable-diagnostics tdr interface int interface configuration command, to run TDR on the port. CSCui45222
- The Cisco Catalyst 4500 Series Switch crashes occasionally when multiple, simultaneous web authentication sessions affect the switch.
Workaround: Avoid custom pages. CSCui71349
- TDR tests results for a port on a WS-X4748-UPOE+E linecard displays Unsupported in the Status field - which is incorrect. Sample output:
Workaround: Run TDR twice. CSCuj58332
- MAB does not trigger for devices if they are connected to a port before authentication is configured, provided the port is configured in authentication open mode.
Workaround: Issue clear mac address dynamic to clear the MAC addresses on the switch and cause MAB to trigger when the MAC address is re-learned. CSCul32730
- The FFM process takes up progressively more memory and the free memory depletes by roughly the same amount - if the following conditions exist:
– A consistent rapid flapping of mroutes.
– Constant traffic toward a group on a VLAN where the SVI has PIM sparse mode configured, but an RP is not permitted for the group.
– For flapping mroutes, track down the flapping mroute and prevent it.
– For a missing RP scenario, either turn off PIM on the VLAN or allow the multicast group to associate with an RP. CSCul44174
- After upgrading to Cisco IOS Release 3.2.7SG and given more than 1024 active groups, both supervisor engines experience multicast packet loss and the number of S, Gs drops continuously.
- Upon one billion updates after booting, the switch crashes several times with the following log message:
Workaround: Reboot the system at a minimally inconvenient time before 1 billion updates have occurred. CSCuo26294
- When an open-ring REP segment is configured with preemption, it fails to revert to a well-known topology after link state change between a pair of transit neighbors.
- Problem with adding new ports to a channel group. When you configure the switchport private-vlan mapping trunk <vlan#1> <vlan#2> command on a port and try to add that port to a channel group where the switchport private-vlan mapping trunk command is not configured, the following error message is displayed:
Apr 23 00:36:33.772 JST: %EC-5-CANNOT_BUNDLE2: Gi6/1 is not compatible with Gi6/3 and will be suspended (mismatch on Secondary VLAN list on trunk)
- Software returns incorrect permanent license type (MIB value) from day 1. The license MIB value should be 4, but the software returns zero. The enum value cannot be changed because it leads to an ISSU breakage (a new TDL version is introduced).
Workaround : None. The license MIB value for the permanent license type is 4 for all Cisco Catalyst 4000 series products. CSCuo90172
- Removing a VLAN Mapping statement causes all traffic to be consistently dropped for other VLAN mapping statements.
– If you want to remove VLAN mapping on 12, but you need mapping on 13 to work, perform these steps:
a. Enter the interface gigabitethernet 2/1 interface configuration command
b. Enter the no switchport vlan mapping 12 dot1q-tunnel 200 interface configuration command
c. Enter the no switchport vlan mapping 13 dot1q-tunnel 200 interface configuration command
d. Enter the switchport vlan mapping 13 dot1q-tunnel 200 interface configuration command
– If you want to restore the original VLAN mapping statement, perform these steps
a. Enter the interface gigabitethernet 2/1 interface configuration command
b. Enter the no switchport vlan mapping 12 dot1q-tunnel 200 interface configuration command
c. Enter the switchport vlan mapping 12 dot1q-tunnel 200 interface configuration command
– Enter the shutdown interface configuration command to shut down the port, remove configuration, and then enter the no shutdown interface configuration command. CSCum12826
- When you configure the ip igmp mroute-proxy interface configuration command and you reload the switch, the switch removes the command. The following example illustrates this problem:
Workaround: Reapply the configuration when the switch reboots. CSCum71764
Resolved Caveats for Cisco IOS XE Release 3.2.8SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.8SG:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Open Caveats for Cisco IOS XE Release 3.2.7SG
This section lists the open caveats for Cisco IOS XE Release 3.2.7SG:
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- Dynamic ACLs do not function correctly if they include advanced operators, including dscp/ipp/tos, log/log-input, fragments and/or tcp flag operators.
Workaround: Remove these operators from any dynamic ACLs. CSCts05302
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.7SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.7SG:
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- On a Supervisor Engine 7-E running IOS Release XE 3.2.6SG and using PIM, a packet memory leak occurs when an "S,G entry" is created. When sufficient packets are leaked, IGMP packets are no longer processed and the switch must reload to restore service.
Workaround: None. This issue does not occur in any other release, or in IOS Release XE 3.2.6SG when PIM is disabled. CSCue03401
Open Caveats for Cisco IOS XE Release 3.2.6SG
This section lists the open caveats for Cisco IOS XE Release 3.2.6SG:
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- Dynamic ACLs do not function correctly if they include advanced operators, including dscp/ipp/tos, log/log-input, fragments and/or tcp flag operators.
Workaround: Remove these operators from any dynamic ACLs. CSCts05302
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- On a Supervisor Engine 7-E running IOS Release XE 3.2.6SG and using PIM, a packet memory leak occurs when an "S,G entry" is created. When sufficient packets are leaked, IGMP packets are no longer processed and the switch must reload to restore service.
Workaround: None. This issue does not occur in any other release, or in IOS Release XE 3.2.6SG when PIM is disabled. CSCue03401
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.6SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.6SG:
- A %SYS-2-NOBLOCK or %SYS-2-BLOCKHUNG message may appear on the switch when an interface with a QoS policy changes speed at the same time information about that interface is being collected (most commonly through a CLI like the show policy-map ... command). Although the QoS policy programming might fail for that interface, no operational impact is observed.
- In a square Layer 2 topology (of at least four switches) where the root bridge is outside of the square (a fifth switch), one link in the square that transitions its role from alternate to root will not send topology change notifications. A stale MAC address may exist in the table until age-out.
Workaround: Reduce MAC aging time or modify Layer 2 topology so that the root is within the square. CSCtx86107
%AUTHMGR-7-RESULT: Authentication result 'success' from 'dot1x' for client (Unknown MAC) on Interface Gi5/39 AuditSessionID AC156241000000670001BC9provided the following conditions apply:
– A switchport is configured with the following:
authentication event server dead action authorize
authenticaton event server alive action reinitalize
– The RADIUS server was down previously, and a port without traffic (for example, a hub with no devices attached) was authorized into the inaccessible authentication bypass (IAB) VLAN without an associated MAC address.
The RADIUS server becomes available again, and the IAB-authorized port transitions to another state.
- The default SNMP engine ID is the same on Supervisor Engine 7-E switches running releases prior to IOS XE 3.2.6SG.
Open Caveats for Cisco IOS XE Release 3.2.5SG
This section lists the open caveats for Cisco IOS XE Release 3.2.5SG:
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- Dynamic ACLs do not function correctly if they include advanced operators, including dscp/ipp/tos, log/log-input, fragments and/or tcp flag operators.
Workaround: Remove these operators from any dynamic ACLs. CSCts05302
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.5SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.5SG:
- On a switch running Cisco IOS Release 3.2.4SG or 3.3.0SG using 4648* or 4748* PoE linecards with connected devices that link flap frequently, a single port on a linecard fails to link up.
Workaround: Enter shut then no shut the port to restore connectivity. CSCtz94862
- On a switch running Cisco IOS Release 3.2.4SG or 3.3.0SG using 4648* or 4748* linecards with PoE, a PoE device will not power up on a single port whereas it works on a different port on the same switch.
– Enter shut then no shut on the port. CSCua63562
- If a switch is configured with the aaa accounting send stop-record authentication failure command, and MAB fails on the port and subsequent attempts are made to authorize the device after the restart timer expires, a high level of memory usage due to the "MAB Framework" process is observed.
Workaround: Unconfigure the following from the switch: aaa accounting send stop-record authentication failure. CSCtj69212
Open Caveats for Cisco IOS XE Release 3.2.4SG
This section lists the open caveats for Cisco IOS XE Release 3.2.4SG:
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- Dynamic ACLs do not function correctly if they include advanced operators, including dscp/ipp/tos, log/log-input, fragments and/or tcp flag operators.
Workaround: Remove these operators from any dynamic ACLs. CSCts05302
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- On a switch running Cisco IOS Release 3.2.4SG or 3.3.0SG using 4648* or 4748* PoE linecards with connected devices that link flap frequently, a single port on a linecard fails to link up.
Workaround: Enter shut then no shut the port to restore connectivity. CSCtz94862
- On a switch running Cisco IOS Release 3.2.4SG or 3.3.0SG using 4648* or 4748* linecards with PoE, a PoE device will not power up on a single port whereas it works on a different port on the same switch.
– Enter shut then no shut on the port. CSCua63562
- If a switch is configured with the aaa accounting send stop-record authentication failure command, and MAB fails on the port and subsequent attempts are made to authorize the device after the restart timer expires, a high level of memory usage due to the "MAB Framework" process is observed.
Workaround: Unconfigure the following from the switch: aaa accounting send stop-record authentication failure. CSCtj69212
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.4SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.4SG:
- If you use Supervisor Engine 7E or Supervisor Engine 7L-E and you enter either the show redundancy or commands beginning with the keyword redundancy, the following error displays:
.Workaround: None. A reload is required to restore these commands. CSCtw95861
- When you execute the show flow monitor monitor_name params top number command simultaneously from different terminals to display the top flows, the supervisor engine might crash.
Workaround: Avoid entering flexible netflow show commands from more than one terminal, when you want to display the top flows. CSCtw61872
- After a switch reestablishes a lost connection with AAA servers configured for broadcast accounting, the switch crashes.
Workaround: Do not use the broadcast keyword in the aaa accounting configuration. CSCts56125
- A switch configured with 802.1X might shows considerable CPU usage by the 802.1X switch process and displays the following message:
The occurs under the following conditions:
– Multi-auth (or multi-host) and MAB dot1x are configured on a port.
– A voice VLAN is not configured on the port.
– The device authenticates through 802.1X.
– The connected device sends no traffic, falls over to MAB, and then successfully authenticates through 802.1X.
– A dynamic VLAN is assigned to the port following 802.1X authorization.
– Enter shut then no shut on the port to halt the high CPU and log messages.
– Enter the switchport voice vlan command on the port. CSCtw73754
- If PoE linecards are present and you enter either the show power inline module x or show power inline module x detail command, very rarely the supervisor engine might crash.
- After a few hours of operation, during which DHCP is enabled and sessions receive DHCP information from a RADIUS server, a Cisco ASR router running as an LNS box crashes with DHCP related errors.
- On a Supervisor Engine 7 running Cisco XE Release 3.2.2SG or 3.2.3SG, SNMP polling of CISCO-PROCESS-MIB data may cause high CPU and SNMP polling timeouts.
Workaround: Use the sample below to restrict SNMP polling from retrieving 1.3.6.1.4.1.9.9.109:
Open Caveats for Cisco IOS XE Release 3.2.3SG
This section lists the open caveats for Cisco IOS XE Release 3.2.3SG:
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- Dynamic ACLs do not function correctly if they include advanced operators, including dscp/ipp/tos, log/log-input, fragments and/or tcp flag operators.
Workaround: Remove these operators from any dynamic ACLs. CSCts05302
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- If you use Supervisor Engine 7E or Supervisor Engine 7L-E and you enter either the show redundancy or commands beginning with the keyword redundancy, the following error displays:
.Workaround: None. A reload is required to restore these commands. CSCtw95861
- When you execute the show flow monitor monitor_name params top number command simultaneously from different terminals to display the top flows, the supervisor engine might crash.
Workaround: Avoid entering fleible netflow show commands from more than one terminal, when you want to display the top flows. CSCtw61872
- After a switch reestablishes a lost connection with AAA servers configured for broadcast accounting, the switch crashes.
Workaround: Do not use the broadcast keyword in the aaa accounting configuration. CSCts56125
- A switch configured with 802.1X might shows considerable CPU usage by the 802.1X switch process and displays the following message:
The occurs under the following conditions:
– Multi-auth (or multi-host) and MAB dot1x are configured on a port.
– A voice VLAN is not configured on the port.
– The device authenticates through 802.1X.
– The connected device sends no traffic, falls over to MAB, and then successfully authenticates through 802.1X.
– A dynamic VLAN is assigned to the port following 802.1X authorization.
– Enter shut then no shut on the port to halt the high CPU and log messages.
– Enter the switchport voice vlan command on the port. CSCtw73754
- If PoE linecards are present and you enter either the show power inline module x or show power inline module x detail command, very rarely the supervisor engine might crash.
- After a few hours of operation, during which DHCP is enabled and sessions receive DHCP information from a RADIUS server, a Cisco ASR router running as an LNS box crashes with DHCP related errors.
- On a Supervisor Engine 7 running Cisco XE Release 3.2.2SG or 3.2.3SG, SNMP polling of CISCO-PROCESS-MIB data may cause high CPU and SNMP polling timeouts.
Workaround: Use the sample below to restrict SNMP polling from retrieving 1.3.6.1.4.1.9.9.109:
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- If a switch is configured with the aaa accounting send stop-record authentication failure command, and MAB fails on the port and subsequent attempts are made to authorize the device after the restart timer expires, a high level of memory usage due to the "MAB Framework" process is observed.
Workaround: Unconfigure the following from the switch: aaa accounting send stop-record authentication failure. CSCtj69212
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.3SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.3SG:
- If a Supervisor Engine 7E is running Cisco IOS Release 3.2.2SG and a considerable quantity of simultaneous ACL, QoS, or Layer 3 programming occurs (usually on switch bootup), ACL, QoS and Layer 3 changes fail to take effect from that point forward.
Workaround: None. The supervisor engine must be reloaded or failed over. CSCtw93728
Open Caveats for Cisco IOS XE Release 3.2.2SG
This section lists the open caveats for Cisco IOS XE Release 3.2.3SG:
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- Dynamic ACLs do not function correctly if they include advanced operators, including dscp/ipp/tos, log/log-input, fragments and/or tcp flag operators.
Workaround: Remove these operators from any dynamic ACLs. CSCts05302
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- If a Supervisor Engine 7E is running Cisco IOS Release 3.2.2SG and a considerable quantity of simultaneous ACL, QoS, or Layer 3 programming occurs (usually on switch bootup), ACL, QoS and Layer 3 changes fail to take effect from that point forward.
Workaround: None. The supervisor engine must be reloaded or failed over. CSCtw93728
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- If you use Supervisor Engine 7E or Supervisor Engine 7L-E and you enter either the show redundancy or commands beginning with the keyword redundancy, the following error displays:
.Workaround: None. A reload is required to restore these commands. CSCtw95861
- When you execute the show flow monitor monitor_name params top number command simultaneously from different terminals to display the top flows, the supervisor engine might crash.
Workaround: Avoid entering flexible netflow show commands from more than one terminal, when you want to display the top flows. CSCtw61872
- After a switch reestablishes a lost connection with AAA servers configured for broadcast accounting, the switch crashes.
Workaround: Do not use the broadcast keyword in the aaa accounting configuration. CSCts56125
- A switch configured with 802.1X might shows considerable CPU usage by the 802.1X switch process and displays the following message:
The occurs under the following conditions:
– Multi-auth (or multi-host) and MAB dot1x are configured on a port.
– A voice VLAN is not configured on the port.
– The device authenticates through 802.1X.
– The connected device sends no traffic, falls over to MAB, and then successfully authenticates through 802.1X.
– A dynamic VLAN is assigned to the port following 802.1X authorization.
– Enter shut then no shut on the port to halt the high CPU and log messages.
– Enter the switchport voice vlan command on the port. CSCtw73754
- If PoE linecards are present and you enter either the show power inline module x or show power inline module x detail command, very rarely the supervisor engine might crash.
- After a few hours of operation, during which DHCP is enabled and sessions receive DHCP information from a RADIUS server, a Cisco ASR router running as an LNS box crashes with DHCP related errors.
- On a Supervisor Engine 7 running Cisco XE Release 3.2.2SG or 3.2.3SG, SNMP polling of CISCO-PROCESS-MIB data may cause high CPU and SNMP polling timeouts.
Workaround: Use the sample below to restrict SNMP polling from retrieving 1.3.6.1.4.1.9.9.109:
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- If a switch is configured with the aaa accounting send stop-record authentication failure command, and MAB fails on the port and subsequent attempts are made to authorize the device after the restart timer expires, a high level of memory usage due to the "MAB Framework" process is observed.
Workaround: Unconfigure the following from the switch: aaa accounting send stop-record authentication failure. CSCtj69212
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.2SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.2SG:
- If Flex link load balancing is configured on a PVLAN flex link pair and some VLANs prefer the backup interface in the pair, entering shut and then no shut on the backup flex link interface causes high cpu from SA miss events. This happens because dynamic mac address learning is broken.
The primary flex link interface comes up correctly.
Workaround: Configure static MAC address for the MAC address that must be learned dynamically on the backup flex link interface. CSCtr40070
- After booting a switch with Supervisor Engine 7-E, you observe two versions of incorrect up time when using show version or show redundancy:
Scenario #1: Display 136 years, 10 weeks, 6 hours, 26 minutes
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.01.01.SG RELEASE SOFTWARE (fc1)Scenario #2: Display “0 minute” after being up for a few days
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.01.01.SG RELEASE SOFTWARE (fc1)
- When configuring, removing, and reapplying IP SLA configuration (reapply without the history filter) and querying the rttmonhistory tree, a Catalyst4 948-10GE switch will fail.
- Layer 2 multicast is not switched egress with a port-channel interface after a member link or port-channel flaps.
1. Delete, then add the affected VLAN with no vlan vlan_ID, then lan vlan_ID.
2. Flap the impacted port-channel with shutdown then no shutdown. CSCtr17251
- When a switch is configured for MAC Authentication Bypass (MAB) EAP and the AAA server requests EAP-TLS (as the EAP method) first, MAB fails.
– Configure the switch port for mab rather than mab eap.
– Configure the AAA server to propose EAP-MD5 first rather than EAP-TLS for MAB EAP requests. CSCti78674
- One or more line cards (WS-X46xx and WS-X47xx series) stop responding to interface changes when near-simultaneous link events (if timed correctly) occur on the same linecard.
Only line cards in the WS-X46xx series and the WS-X47xx series are affected. Interfaces that are already linked-up are not affected.
Workaround: Eliminate link flap. If the problem exists, do one of the following:
– Reload the linecard module with the hw-module module n reset command.
– For dual supervisor engines, perform a switchover. CSCts67025
- Frequent link flap can trigger a failure that causes control plane latency until the switch is reloaded. After the issue is triggered, normal traffic is forwarded without drops, but pings to or from the switch drop, and new connections to linecards come up slowly or not at all. The following error messages appear:
Workaround: Eliminate link flap.
Provide temporary remediation with a forced supervisor engine switchover. CSCtt06131
- Occasionally, when an interface with a QoS policy changes speed or when a QoS policy is being programmed on an interface, a Supervisor Engine 7 might unexpectedly encounter an FFM crash.
- A vulnerability in the Multicast Source Discovery Protocol (MSDP) implementation of Cisco IOS Software and Cisco IOS XE Software could allow a remote, unauthenticated attacker to cause a reload of an affected device. Repeated attempts to exploit this vulnerability could result in a sustained denial of service (DoS) condition.
Cisco has released free software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-msdp
Note The March 28, 2012, Cisco IOS Software Security Advisory bundled publication includes nine Cisco Security Advisories. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the March 2012 bundled publication.
Individual publication links are in ''Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication'' at the following link:
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar12.htmlOpen Caveats for Cisco IOS XE Release 3.2.1SG
This section lists the open caveats for Cisco IOS XE Release 3.2.1SG:
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- If Flex link load balancing is configured on a PVLAN flex link pair and some VLANs prefer the backup interface in the pair, entering shut and then no shut on the backup flex link interface causes high cpu from SA miss events. This happens because dynamic mac address learning is broken.
The primary flex link interface comes up correctly.
Workaround: Configure static MAC address for the MAC address that must be learned dynamically on the backup flex link interface. CSCtr40070
- After booting a switch with Supervisor Engine 7-E, you observe two versions of incorrect up time when using show version or show redundancy:
Scenario #1: Display 136 years, 10 weeks, 6 hours, 26 minutes
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.01.01.SG RELEASE SOFTWARE (fc1)Scenario #2: Display “0 minute” after being up for a few days
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.01.01.SG RELEASE SOFTWARE (fc1)
- Dynamic ACLs do not function correctly if they include advanced operators, including dscp/ipp/tos, log/log-input, fragments and/or tcp flag operators.
Workaround: Remove these operators from any dynamic ACLs. CSCts05302
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- When a switch is configured for MAC Authentication Bypass (MAB) EAP and the AAA server requests EAP-TLS (as the EAP method) first, MAB fails.
– Configure the switch port for mab rather than mab eap.
– Configure the AAA server to propose EAP-MD5 first rather than EAP-TLS for MAB EAP requests. CSCti78674
- When configuring, removing, and reapplying IP SLA configuration (reapply without the history filter) and querying the rttmonhistory tree, a Catalyst4 948-10GE switch will fail.
- Layer 2 multicast is not switched egress with a port-channel interface after a member link or port-channel flaps.
1. Delete, then add the affected VLAN with no vlan vlan_ID, then lan vlan_ID.
2. Flap the impacted port-channel with shutdown, then no shutdown. CSCtr17251
- One or more line cards (WS-X46xx and WS-X47xx series) stop responding to interface changes when near-simultaneous link events (if timed correctly) occur on the same linecard.
Only line cards in the WS-X46xx series and the WS-X47xx series are affected. Interfaces that are already linked-up are not affected.
Workaround: Eliminate link flap. If the problem exists, do one of the following:
– Reload the linecard module with the hw-module module n reset command.
– For dual supervisor engines, perform a switchover. CSCts67025
- Frequent link flap can trigger a failure that causes control plane latency until the switch is reloaded. After the issue is triggered, normal traffic is forwarded without drops, but pings to or from the switch drop, and new connections to linecards come up slowly or not at all. The following error messages appear:
Workaround: Eliminate link flap.
Provide temporary remediation with a forced supervisor engine switchover. CSCtt06131
- Occasionally, when an interface with a QoS policy changes speed or when a QoS policy is being programmed on an interface, a Supervisor Engine 7 might unexpectedly encounter an FFM crash.
- A vulnerability in the Multicast Source Discovery Protocol (MSDP) implementation of Cisco IOS Software and Cisco IOS XE Software could allow a remote, unauthenticated attacker to cause a reload of an affected device. Repeated attempts to exploit this vulnerability could result in a sustained denial of service (DoS) condition.
Cisco has released free software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-msdp
Note The March 28, 2012, Cisco IOS Software Security Advisory bundled publication includes nine Cisco Security Advisories. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the March 2012 bundled publication.
Individual publication links are in ''Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication'' at the following link:
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar12.html
- If a Supervisor Engine 7E is running Cisco IOS Release 3.2.2SG and a considerable quantity of simultaneous ACL, QoS, or Layer 3 programming occurs (usually on switch bootup), ACL, QoS and Layer 3 changes fail to take effect from that point forward.
Workaround: None. The supervisor engine must be reloaded or failed over. CSCtw93728
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- If you use Supervisor Engine 7E or Supervisor Engine 7L-E and you enter either the show redundancy or commands beginning with the keyword redundancy, the following error displays:
.Workaround: None. A reload is required to restore these commands. CSCtw95861
- When you execute the show flow monitor monitor_name params top number command simultaneously from different terminals to display the top flows, the supervisor engine might crash.
Workaround: Avoid entering flexible netflow show commands from more than one terminal, when you want to display the top flows. CSCtw61872
- After a switch reestablishes a lost connection with AAA servers configured for broadcast accounting, the switch crashes.
Workaround: Do not use the broadcast keyword in the aaa accounting configuration. CSCts56125
- A switch configured with 802.1X might shows considerable CPU usage by the 802.1X switch process and displays the following message:
The occurs under the following conditions:
– Multi-auth (or multi-host) and MAB dot1x are configured on a port.
– A voice VLAN is not configured on the port.
– The device authenticates through 802.1X.
– The connected device sends no traffic, falls over to MAB, and then successfully authenticates through 802.1X.
– A dynamic VLAN is assigned to the port following 802.1X authorization.
– Enter shut then no shut on the port to halt the high CPU and log messages.
– Enter the switchport voice vlan command on the port. CSCtw73754
- If PoE linecards are present and you enter either the show power inline module x or show power inline module x detail command, very rarely the supervisor engine might crash.
- After a few hours of operation, during which DHCP is enabled and sessions receive DHCP information from a RADIUS server, a Cisco ASR router running as an LNS box crashes with DHCP related errors.
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- If a switch is configured with the aaa accounting send stop-record authentication failure command, and MAB fails on the port and subsequent attempts are made to authorize the device after the restart timer expires, a high level of memory usage due to the "MAB Framework" process is observed.
Workaround: Unconfigure the following from the switch: aaa accounting send stop-record authentication failure. CSCtj69212
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.1SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.1SG:
- When you configure EnergyWise power control on PoE ports with a time-based execution schedule, time entry executes without adjusting for daylight savings time.
Workaround: Manually re-enter all entries with new time settings.
- Under Cisco IOS Release 15.0.1.XO, Control Plane Policing is missing class system-cgmp-cpp. When adding this class manually and then attaching a policer to this class, the policer matches on any IP packet.
Workaround: Do not use or remove class system-cgmp-cpp. CSCtn46868
- After a session falls back to Web Authentication, and no port ACL or fallback ACL is configured, Auth_Default_ACL is programmed infrequently.
Workaround: Configure a port ACL on the interface. CSCtl89389
- When re-connecting to a switch using device tracking, a Windows Vista, 2008, or 2007 device registers a duplicate address message. A Windows Vista, 2008, or 2007 client probes for a tentative IP address while the switch probes for device status. This issue is usually triggered by disconnecting or reconnecting.
Workaround: Disable gratuitous ARPs on the Windows device. CSCtn27420
- If you create a new IPv6 ACL, delete a permit ACE, and then add back the permit ACE, the sh run | b ipv6 access-list command displays unexpected commands on the IPv6 access-list configuration.
In the output above, sequence 40 is the unexpected command that appears in front of the entry.
Workaround: Delete the access-list and reconfigure all entries, rather than deleting or reconfiguring the access-list. CSCtn83348
- A switch configured for epm open directive in multi-auth configuration fails when authentication sessions are cleared.
Workaround: Do not configure open directive on the switch.
Workaround: Modify max login attempts when webauth is not active. CSCtn17953
- During an SSO/ISSU operation, if an EEE linecard is OIR'd, removed or replaced, and the Ethernet Energy Efficient feature is configured on a given port, the configuration cannot be saved.
Workaround: Deconfigure EEE before running SSO/ISSU or relocating an EE linecard; or reconfigure EEE again after the upgrade or linecard reinsertion.
- The power reported as delivered to a UPOE (greater than 30 watts) client may drop suddenly when a supervisor engine switchover occurs. The device still functions properly, provided power inline police is not enabled on the device's port.
Workaround: Do not enable power inline police on ports delivering more than 30 watts in a redundant system. CSCtq32785
- A Supervisor Engine 7-E might fail when the output queuing policy is removed and readded through some range of interfaces that undergoes speed change or negotiation and the impacted interface has an attached queuing policy.
- On a Supervisor Engine 7-E, if an output service policy is applied on a port and that port is connected to a PC or other client device, some traffic appears to be dropped in the egress direction after boot up because of misprogrammed port TxQ.
Workaround:Remove and readd the outbound service policy. CSCtq40350
- If you use IGMP reports with groups like 226.0.0.2, 225.0.0.2, or 225.128.0.2, HSRP hello packets drop and HSRP peers are down. This happens because HSRP hello packets are sent to MAC address 224.0.0.2, which overlaps with the IGMP group addresses just mentioed.
Workaround: None. Use a different IGMP group address. CSCtq15982
- The list of VLANs defined by the vlan-range command used for configuring per-VLAN QoS is too long, causing the system to reject the command and display the following log:
Command rejected: Bad VLAN list - character #"X" (EOL) delimits a VLAN number ("Y") end of range not larger than the start of range ("Z").Workaround: Remove the logging filter. CSCto76709
- A Supervisor Engine 7-E will fail when the following applies when an ACL used by the class-map is modified to match new traffic and a control plane policy is currently attache.
Workaround: Configure new class-maps and a policy-map. Replace the control plane policy with the new policy. CSCto45530
- A host IP is not inserted into a URL redirect ACL unless the host IP is already in the device tracking table (DHCP snooping or IPDT).
Open Caveats for Cisco IOS XE Release 3.2.0SG
This section lists the open caveats for Cisco IOS XE Release 3.2.0SG:
- When you configure EnergyWise power control on PoE ports with a time-based execution schedule, time entry executes without adjusting for daylight savings time.
Workaround: Manually re-enter all entries with new time settings.
- When collecting data from the cpmCPUProcessHistoryTable, the data takes a long time to provide and the CPU utilization of the os_info_p process (OS Info provider) increases substantially. The time it takes to do a full walk of an almost fully populated table takes 68 minutes.
- The show ipv6 access-list command displays incorrect match counts when multicast traffic is matched to an IPv6 access-list attached to an SVI.
This problem affects the Cisco Catalyst 4500 Series Supervisor 7E.
- Under Cisco IOS Release 15.0.1.XO, Control Plane Policing is missing class system-cgmp-cpp. When adding this class manually and then attaching a policer to this class, the policer matches on any IP packet.
Workaround: Do not use or remove class system-cgmp-cpp. CSCtn46868
- Supervisor Engine 7-E running Cisco IOS XE 3.1.1(SG) crashes with FFM traceback when applying a qos policy to all the interfaces of a WS-X4748-RJ45V+E module with the interface range command.
- When either the RADIUS-server test feature or RADIUS-erver dead-criteria is configured and either RADIUS-server deadtime is not configured or is set to 0, the RADIUS-server status is not properly relayed to AAA.
Workaround: Configure both dead-criteria and deadtime.
- After a session falls back to Web Authentication, and no port ACL or fallback ACL is configured, Auth_Default_ACL is programmed infrequently.
Workaround: Configure a port ACL on the interface. CSCtl89389
- When spanning tree is changed from PVST to Rapid PVST and you enter the show spanning-tree vlan command, the ports configured as promiscuous trunks are not listed as part of the spanning tree.
Workaround: Enter shut, then no shut on the ports. CSCtn88228
- Unless you enter the show mem detailed process command on a Supervisor Engine 7-E switch, the parser chain is not displayed.
Workaround: Enter the complete command string:
- When re-connecting to a switch using device tracking, a Windows Vista, 2008, or 2007 device registers a duplicate address message. A Windows Vista, 2008, or 2007 client probes for a tentative IP address while the switch probes for device status. This issue is usually triggered by disconnecting or reconnecting.
Workaround: Disable gratuitous ARPs on the Windows device. CSCtn27420
- If you create a new IPv6 ACL, delete a permit ACE, and then add back the permit ACE, the sh run | b ipv6 access-list command displays unexpected commands on the IPv6 access-list configuration.
In the output above, sequence 40 is the unexpected command that appears in front of the entry.
Workaround: Delete the access-list and reconfigure all entries, rather than deleting or reconfiguring the access-list. CSCtn83348
- If you configure Open Authentication and perform SSO, the spanning tree state and MAC address are not synchronized to the new standby supervisor engine. The issue interrupts traffic only after the second switchover, because after the initial switchover the new standby supervisor engine possesses the wrong state, and the second switchover will start the port in the blocking state.
Workaround: Enter shut, and then no shut on the port to synchronize the STP state. CSCtf52437
- If you reboot a switch, the configured value of interface MTU size on the members of port-channel interface does not function for IPv6 traffic.
Workaround: After the switch reloads, enter shut, then no shut on the port-channel interface.
- A switch configured for epm open directive in multi-auth configuration fails when authentication sessions are cleared.
Workaround: Do not configure open directive on the switch.
- If you enter the clear ip mroute ? command, only the vrf option is displayed. The Hostname and ' * ' options are not displayed, although they are accepted by the system, and the clear ip mroute command functions as expected.
Workaround: Increase the queue limit to at least 256. CSCto57602
– Links flap for various Layer 3 protocols.
– A traffic loss of several seconds occurs during the upgrade process.
Workaround: Do not use the quick option with the issu changeversion command.
Workaround: Modify max login attempts when webauth is not active. CSCtn17953
- A device in a Guest VLAN that is connected behind a phone capable of 2nd-port-TLV, experiences packet loss following a SSO failover. The device experiences an authentication restart after the first CDP frame arrives from the phone.
- A host IP is not inserted into a URL redirect ACL unless the host IP is already in the device tracking table (DHCP snooping or IPDT).
- If Filter ID or fallback ACLs are currently applied to a port, and you modify them, they will not be programmed correctly in hardware.
Workaround: Modify filter ID or fallback ACLs only when they are not in use. CSCto79274
- During an SSO/ISSU operation, if an EEE linecard is OIR'd, removed or replaced, and the Ethernet Energy Efficient feature is configured on a given port, the configuration cannot be saved.
Workaround: Deconfigure EEE before running SSO/ISSU or relocating an EE linecard; or reconfigure EEE again after the upgrade or linecard reinsertion.
- The power reported as delivered to a UPOE (greater than 30 watts) client may drop suddenly when a supervisor engine switchover occurs. The device still functions properly, provided power inline police is not enabled on the device's port.
Workaround: Do not enable power inline police on ports delivering more than 30 watts in a redundant system. CSCtq32785
- If you perform an OIR on a linecard, several %C4K_RKNOVA-4-INVALIDTOKENEXPIRED messages appear in the logs.
- When configuring, removing, and reapplying IP SLA configuration (reapply without the history filter) and querying the rttmonhistory tree, a Catalyst4 948-10GE switch will fail.
- Layer 2 multicast is not switched egress with a port-channel interface after a member link or port-channel flaps.
1. Delete, then add the affected VLAN with no vlan vlan_ID, then lan vlan_ID.
2. Flap the impacted port-channel with shutdown, then no shutdown. CSCtr17251
- If Flex link load balancing is configured on a PVLAN flex link pair and some VLANs prefer the backup interface in the pair, entering shut and then no shut on the backup flex link interface causes high cpu from SA miss events. This happens because dynamic mac address learning is broken.
The primary flex link interface comes up correctly.
Workaround: Configure static MAC address for the MAC address that must be learned dynamically on the backup flex link interface. CSCtr40070
- When a switch is configured for MAC Authentication Bypass (MAB) EAP and the AAA server requests EAP-TLS (as the EAP method) first, MAB fails.
– Configure the switch port for mab rather than mab eap.
– Configure the AAA server to propose EAP-MD5 first rather than EAP-TLS for MAB EAP requests. CSCti78674
- One or more line cards (WS-X46xx and WS-X47xx series) stop responding to interface changes when near-simultaneous link events (if timed correctly) occur on the same linecard.
Only line cards in the WS-X46xx series and the WS-X47xx series are affected. Interfaces that are already linked-up are not affected.
Workaround: Eliminate link flap. If the problem exists, do one of the following:
– Reload the linecard module with the hw-module module n reset command.
– For dual supervisor engines, perform a switchover. CSCts67025
- Frequent link flap can trigger a failure that causes control plane latency until the switch is reloaded. After the issue is triggered, normal traffic is forwarded without drops, but pings to or from the switch drop, and new connections to linecards come up slowly or not at all. The following error messages appear:
Workaround: Eliminate link flap.
Provide temporary remediation with a forced supervisor engine switchover. CSCtt06131
- After booting a switch with Supervisor Engine 7-E, you observe two versions of incorrect up time when using show version or show redundancy:
Scenario #1: Display 136 years, 10 weeks, 6 hours, 26 minutes
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.01.01.SG RELEASE SOFTWARE (fc1)Scenario #2: Display “0 minute” after being up for a few days
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.01.01.SG RELEASE SOFTWARE (fc1)
- Occasionally, when an interface with a QoS policy changes speed or when a QoS policy is being programmed on an interface, a Supervisor Engine 7 might unexpectedly encounter an FFM crash.
- A vulnerability in the Multicast Source Discovery Protocol (MSDP) implementation of Cisco IOS Software and Cisco IOS XE Software could allow a remote, unauthenticated attacker to cause a reload of an affected device. Repeated attempts to exploit this vulnerability could result in a sustained denial of service (DoS) condition.
Cisco has released free software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available. This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-msdp
Note The March 28, 2012, Cisco IOS Software Security Advisory bundled publication includes nine Cisco Security Advisories. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the March 2012 bundled publication.
Individual publication links are in ''Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication'' at the following link:
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_mar12.html
- If a Supervisor Engine 7E is running Cisco IOS Release 3.2.2SG and a considerable quantity of simultaneous ACL, QoS, or Layer 3 programming occurs (usually on switch bootup), ACL, QoS and Layer 3 changes fail to take effect from that point forward.
Workaround: None. The supervisor engine must be reloaded or failed over. CSCtw93728
- On a redundant system consisting of supervisor engines 6-E and 7-E, when the system consumes considerable memory (for example, with heavy multicast traffic), a crash may occur. This event is due to a memory mismatch between the two supervisor engines.
Workaround: Upgrade the memory of Supervisor Engine 6-E to match that of Supervisor Engine 7-E.
- If you use Supervisor Engine 7E or Supervisor Engine 7L-E and you enter either the show redundancy or commands beginning with the keyword redundancy, the following error displays:
.Workaround: None. A reload is required to restore these commands. CSCtw95861
- When you execute the show flow monitor monitor_name params top number command simultaneously from different terminals to display the top flows, the supervisor engine might crash.
Workaround: Avoid entering flexible netflow show commands from more than one terminal, when you want to display the top flows. CSCtw61872
- After a switch reestablishes a lost connection with AAA servers configured for broadcast accounting, the switch crashes.
Workaround: Do not use the broadcast keyword in the aaa accounting configuration. CSCts56125
- A switch configured with 802.1X might shows considerable CPU usage by the 802.1X switch process and displays the following message:
The occurs under the following conditions:
– Multi-auth (or multi-host) and MAB dot1x are configured on a port.
– A voice VLAN is not configured on the port.
– The device authenticates through 802.1X.
– The connected device sends no traffic, falls over to MAB, and then successfully authenticates through 802.1X.
– A dynamic VLAN is assigned to the port following 802.1X authorization.
– Enter shut then no shut on the port to halt the high CPU and log messages.
– Enter the switchport voice vlan command on the port. CSCtw73754
- If PoE linecards are present and you enter either the show power inline module x or show power inline module x detail command, very rarely the supervisor engine might crash.
- After a few hours of operation, during which DHCP is enabled and sessions receive DHCP information from a RADIUS server, a Cisco ASR router running as an LNS box crashes with DHCP related errors.
- Configuring an interface as uni-directional with the unidirectional send-only | receive-only command still allows the interface to send (configured as “Send-only Unidirection Ethernet mode”) or receive (configured as "Receive-only Unidirection Ethernet mode") packets in a bi-directional mode.
- If a switch is configured with the aaa accounting send stop-record authentication failure command, and MAB fails on the port and subsequent attempts are made to authorize the device after the restart timer expires, a high level of memory usage due to the "MAB Framework" process is observed.
Workaround: Unconfigure the following from the switch: aaa accounting send stop-record authentication failure. CSCtj69212
- If REP is configured on a dot1q trunk and the native VLAN is administratively set to a non-default value, REP packets are not sent on the native VLAN.
Workaround: Retain the trunk native V LAN as 1. CSCud05521
- SFP modules GLC-SX-MMD and GLC-SH-LMD may not be recognized when used with the WS-X4448-GB-SFP linecard.
– Use modules GLC-SX-MM and GLC-LH-SM instead.
– Use a release other than IOS XE 3.2.0SG (or IOS 15.0(2)SG) through IOS XE 3.2.6SG (or IOS 15.0(2)SG6). CSCub52430
- If a dACL name is too long (about 24 characters, depending on the interface where it is applied), the ACL is incorrectly shared over multiple ports.
Workaround: Shorten the dACL name. CSCug78653
- redirect-url and redirect-acl are not cleared after a successful CoA, causing the final step of Central Web Authentication to fail.
Workaround: Return a dACL in the authorization profile with successful guest authentication.
- If URL redirect is installed as part of authorization and either of the following occurs, memory will leak:
– A fast stream of traffic matches the URL redirect ACL as IPDT clears an address.
– A traffic stream matches the URL redirect ACL and no URL redirect policy is installed for that IP address.
If memory leak occurs repeatedly, IPDT and other control packet processing ultimately ceases.
Workaround: If this behavior completely fills the CPU buffer, the switch must be reloaded. However, the frequency of encountering a stuck queue can be reduced to nearly zero by modifying the URL redirect ACL to permit only 80/443 traffic. CSCug56646
- If a device is authenticating while the RADIUS server goes down, the port connected to the device may enter the err-disabled state.
Workaround: Configure RADIUS test and dead criteria.
- An SNMP walk of the LLDP MIB (OID 1.0.8802.1.1.2.1.5.4795) times out and produces a message similar to the following:
Jun 19 10:48:51.835 UTC: %SYS-3-CPUHOG: Task is running for (2016)msecs, more than (2000)msecs (5/5),process = SNMP ENGINE.Workaround: Exclude the mib "lldpXMedMIB" with the snmp-server view restrict lldpXMedMIB excluded command. CSCuh88726
Resolved Caveats for Cisco IOS XE Release 3.2.0SG
This section lists the resolved caveats for Cisco IOS XE Release 3.2.0SG:
- On a redundant configuration, if a switchover occurs immediately after a port falls back to Webauth from 802.1X or MAB, you may notice a delay in loading the Webauth login page on the browser.
Workaround: Enter shut, then no-shut on the link, then flush the IP device tracking table.
Workaround: IGMP snooping can still be disabled on VLANs individually. CSCth17903
Copy in progress...CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCWorkaround: Avoid remote copying to or from a standby usb0:. Copy from a standby bootflash or make a local copy directly at the standby bootflash. CSCti29518
- On all redundant configurations, RF Switchover History time is incorrect when accessed through cRFHistorySwactTime.
Workaround: Use the show redundancy and show redundancy states commands to retrieve the switchover history times. CSCti53834
- On all redundant configurations, SNMP operations to obtain Redundancy Switchover history using cRFHistoryTable fail, displaying the following message:
Workaround: Enter the show redundancy switchover history command to obtain redundancy switchover history. CSCti55424
- The ciscoFlashPartitionFileCount object returns an incorrect file count for bootflash:, usb0:, slot0:, slaveslot0:, slavebootflash:, and slaveusb0:.
Workaround: Use the dir device command to obtain the correct file count (for example, dir bootflash:). CSCti74130
*Jul 30 11:38:58.890 UTC: %IOSXE-3-PLATFORM: STANDBY:4 kernel: usb 1-2: device descriptor read/64, error -110*Jul 30 11:39:14.169 UTC: %IOSXE-3-PLATFORM: STANDBY:4 kernel: usb 1-2: device descriptor read/64, error -110*Jul 30 11:39:29.625 UTC: %IOSXE-3-PLATFORM: STANDBY:4 kernel: usb 1-2: device descriptor read/64, error -110Workaround: Remove the slaveusb0, reinsert the slaveusb0:, then recopy. CSCti19321
- Three to five minutes after you create a GRE tunnel between interfaces on two switches (first hop and last hop), you observe that the FHR begins to drop the tunnel traffic. This causes the (S,G) entry, originally created on the LHR when sending IPv6 source traffic, to time out.
Workaround: Enter shut, then no shut on the host port interface of the first hop. CSCti44397
- If you are using a large customized Web Authentication login page on a switch running Cisco IOS Release 12.2(53)SG3 or IOS XE 3.1.0 SG and multiple users attempt to access custom HTML pages, the switch might reload.
Workaround: Unconfigure the customized HTML page to use default internal Webauth pages, change the configuration, then reload the switch. CSCti81874
- The Policy Based Routing (PBR) function fails on a Supervisor Engine 7-E running Cisco IOS Release 3.2.1.SG. Packets are software switched and not sent to the next hop as defined in the PBR route-map. Packets are routed to their destination via the IP routing table lookup rather than the route-map configured on the ingress interface.
The show platform hardware acl in entries vlan command indicates that the ACL action does not point to an adjacency for the affected VLAN(s).
Workaround: Enter the cef table output-chain build favor memory-utilization command globally. CSCtn91576
- When kron initiates a write to the startup-config (that is, execution of the write mem command), it is locked indefinitely.
Workaround: Reload the switch to restore access, then use EEM with the timer event to schedule the required task. CSCtk68692
- If a redirect ACL is installed on multiple ports using cisco-av-pair url-redirect-acl=ACLNAME and you modify the ACL, the EPM MAIN process reports elevated CPU usage.
- If host mode multi-domain is configured, after a successful authorization, neither the data device nor the IP phone will pass traffic.
- A non-supplicant PC is connected to an 802.1x port in MDA mode. Upon no response to EAPOL, the PC is placed in a Guest VLAN (correct behavior). If the supplicant is enabled on the PC and the credentials are entered, the switch reports AUTHC success and AUTHZ fail. If client re-attempts 802.1x before the port returns to the Guest VLAN, this process succeeds.
- When a configuration file has VTP mode off and is copied to the running config, the VLANs that are not already in the VLAN database are not created.
– Create the VLANs manually. CSCtl94096
- LACP ports between a Catalyst 4500 Switch and a Nexus enter Suspended Mode when the native VLAN is tagged and changed to x on both chassis (native VLAN is not 1).
- LLDP frames are tagged incorrectly when leaving an 802.1q port if the native VLAN has a value other than 1.
Workaround: Use the default native VLAN (VLAN of 1) for the trunks. CSCtn29321
- Some non-powered devices fail to linkup when connected to a 4648-RJ45-E/+E or 4748-RJ45+E line card port with a two-pair/4-wire cable (1,2,3,6).
This behavior is observed when you use IBM Cable Systems Type 1A/2A or any two-pair cable, including Cat5e.
– Enter the power inline never command.
– Enter the speed auto 10 100 command. CSCtn43537
- Following a route flap, a Supervisor Engine 7-E running Cisco IOS XE Release 3.1.0XO or 3.1.1SG crashes and generates an FFM crashinfo file.
Workaround: None. Upgrade to Cisco IOS XE Release 3.2.0SG or higher. CSCtr54723
Troubleshooting
These sections provide troubleshooting guidelines for the Catalyst 4500 series switches running IOS supervisor engines:
- Netbooting from ROMMON
- Troubleshooting at the System Level
- Troubleshooting Modules
- Troubleshooting MIBs
Netbooting from ROMMON
Netbooting using a boot loader image is not supported. Instead, use one of the following options to boot an image:
1. Boot from an SD card by entering the following command:
The ROMMON TFTP boot is very similar to the BOOTLDR TFTP boot, except that:
– the BOOTLDR variable should not be set
– the TFTP server must be accessible from the Ethernet management port on the supervisor engine.
To boot from ROMMON, perform the following tasks while in ROMMON mode:
a. Ensure that the Ethernet management port on the supervisor engine is physically connected to the network.
b. Verify that bootloader environment is not set by entering the unset bootldr command.
c. Set IP address of the Ethernet management port on the supervisor engine by entering the following command: set interface fa1 ip_address ip_mask
For example, to set the supervisor engine Ethernet port with an IP address 172.16.1.5 and IP mask 255.255.255.0, enter the following command:
d. Set default gateway for the Ethernet management port on the supervisor engine by entering the following command: set ip route default gateway_ip_address . The default gateway should be directly connected to the supervisor engine Ethernet management port subnet.
e. Ping the TFTP server to ensure that there is connectivity to the server from the Ethernet management port on the supervisor engine by entering the following command: ping tftp_server_ip_address .
f. Once the ping is successful, boot the image from the TFTP server by entering the following command: boot tftp:// tftp_server_ip_address / image_path_and_file_name
For example, to boot the Cisco IOS XE image cat4500e-universalk9.03.01.00 .SG.150-1.XO.bin located on the TFTP server 172.16.1.8, enter the following command:
Troubleshooting at the System Level
This section contains troubleshooting guidelines for system-level problems:
- When the system is booting and running power-on diagnostics, do not reset the switch.
- Ensure that you do not mix the serial and Ethernet cables plugged into the supervisor engine. The Fast Ethernet port (10/100 MGT) on the supervisor engine is inoperative. An Ethernet cable plugged into the Fast Ethernet port is active only in ROMMON mode.
Troubleshooting Modules
This section contains troubleshooting guidelines for modules:
- When you hot insert a module into a chassis, always use the ejector levers on the front of the module to seat the backplane pins properly. Inserting a module without using the ejector levers might cause the supervisor engine to display incorrect messages about the module. For module installation instructions, refer to the Catalyst 4500 Series Module Installation Guide .
- Whenever you connect an interface that has duplex set to autonegotiate to an end station or another networking device, ensure that the other device is configured for autonegotiation as well. If the other device is not set to autonegotiate, the port set to autonegotiate will remain in half-duplex mode, which can cause a duplex mismatch resulting in packet loss, late collisions, and line errors on the link.
Troubleshooting MIBs
For general information on MIBs, RMON groups, and traps, refer to the Cisco public MIB directory ( http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml ). For information on the specific MIBs supported by the Catalyst 4500 series switches, refer to the Catalyst 4000 MIB Support List located at ftp://ftp.cisco.com/pub/mibs/supportlists/cat4000/cat4000-supportlist.html.
Notices
The following notices pertain to this software license.
OpenSSL/Open SSL Project
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit ( http://www.openssl.org/ ).
This product includes cryptographic software written by Eric Young (eay@cryptsoft.com).
This product includes software written by Tim Hudson (tjh@cryptsoft.com).
License Issues
The OpenSSL toolkit stays under a dual license, i.e. both the conditions of the OpenSSL License and the original SSLeay license apply to the toolkit. See below for the actual license texts. Actually both licenses are BSD-style Open Source licenses. In case of any license issues related to OpenSSL please contact openssl-core@openssl.org.
Copyright © 1998-2007 The OpenSSL Project. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software must display the following acknowledgment: “This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit ( http://www.openssl.org/ )”.
4. The names “OpenSSL Toolkit” and “OpenSSL Project” must not be used to endorse or promote products derived from this software without prior written permission. For written permission, please contact openssl-core@openssl.org.
5. Products derived from this software may not be called “OpenSSL” nor may “OpenSSL” appear in their names without prior written permission of the OpenSSL Project.
6. Redistributions of any form whatsoever must retain the following acknowledgment:
“This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit ( http://www.openssl.org/ )”.
THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT “AS IS”' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This product includes cryptographic software written by Eric Young (eay@cryptsoft.com). This product includes software written by Tim Hudson (tjh@cryptsoft.com).
Copyright © 1995-1998 Eric Young (eay@cryptsoft.com). All rights reserved.
This package is an SSL implementation written by Eric Young (eay@cryptsoft.com).
The implementation was written so as to conform with Netscapes SSL.
This library is free for commercial and non-commercial use as long as the following conditions are adhered to. The following conditions apply to all code found in this distribution, be it the RC4, RSA, lhash, DES, etc., code; not just the SSL code. The SSL documentation included with this distribution is covered by the same copyright terms except that the holder is Tim Hudson (tjh@cryptsoft.com).
Copyright remains Eric Young’s, and as such any Copyright notices in the code are not to be removed. If this package is used in a product, Eric Young should be given attribution as the author of the parts of the library used. This can be in the form of a textual message at program startup or in documentation (online or textual) provided with the package.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software must display the following acknowledgement:
“This product includes cryptographic software written by Eric Young (eay@cryptsoft.com)”.
The word ‘cryptographic’ can be left out if the routines from the library being used are not cryptography-related.
4. If you include any Windows specific code (or a derivative thereof) from the apps directory (application code) you must include an acknowledgement: “This product includes software written by Tim Hudson (tjh@cryptsoft.com)”.
THIS SOFTWARE IS PROVIDED BY ERIC YOUNG “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
The license and distribution terms for any publicly available version or derivative of this code cannot be changed. i.e. this code cannot simply be copied and put under another distribution license [including the GNU Public License].
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation , which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
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