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Table Of Contents
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.0(17)SLUpgrading to a New Software Release
Upgrading Cisco IOS Software from Earlier Cisco IOS Releases
Cisco 10000 Series ESR Software Features
Automatic Protection Switching Support
Testing Performance of High-Speed Interfaces
Resolved Problems in Cisco IOS Release 12.0(17)SL
Obtaining Technical Assistance
Contacting TAC by Using the Cisco TAC Website
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.0(17)SL
June 25, 2001
These release notes provide information about Cisco IOS Release 12.0(17)SL running on the Cisco 10000 series edge services router (ESR).
These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode and related documents.
Cisco IOS Release 12.0(17)SL is based on these previous releases:
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Cisco IOS Release 12.0(15)SL
•
For a list of the software caveats that apply to Cisco IOS Release 12.0(17)SL, see the "Caveats" section and the Release Notes for Cisco IOS Release 12.0(S).
To review the release notes for Cisco IOS Release 12.0S, go to www.cisco.com and click Technical Documents > Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Release Notes > Cisco 12000 Series Router > Cisco 7000 Family and 12000 Series - Release Notes for Release 12.0(S).
Use these release notes in conjunction with the cross-platform Release Notes for Cisco IOS Release 12.0.
Contents
This document contains the following sections:
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Upgrading to a New Software Release
For specific information about upgrading your Cisco 10000 series ESR to a new software release, see the Cisco 10000 Series ESR Software Configuration Guide.
For general information about upgrading to a new software release, see the product bulletin Cisco IOS Upgrade Ordering Instructions located at:
http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/957_pp.htm
For additional information about ordering Cisco IOS software, refer to the Cisco IOS Software Releases URL:
http://www.cisco.com/warp/public/cc/pd/iosw/iore/index.shtml
Upgrading Cisco IOS Software from Earlier Cisco IOS Releases
Caution
Save your current configuration file before upgrading to Cisco IOS Release 12.0(17)SL. If you decide to reinstall Release 12.0(14)SL, or an earlier release, you must also reinstall the configuration file associated with that release. This is because some BGP configuration-file entries in 12.0(17)SL are not compatible with 12.0(14)SL or earlier releases.
System Requirements
We recommend that you use 512 MB of memory on the Performance Routing Engine (PRE). New PREs are shipped with 512 MB of memory. In a redundant setup, both PREs should have the same amount of memory.
New Features
The following new features and improvements are supported in Cisco IOS Release 12.0(17)SL:
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Cisco 10000 Series ESR Software Features
Table 1 lists the features supported in the Cisco 10000 Series ESR.
Limitations and Restrictions
This section describes any limitations and restrictions that you should review before you use the Cisco 10000 series ESR.
Automatic Protection Switching Support
Automatic protection switching is supported on the OC-12 Packet Over SONET (POS) and Channelized OC-12 (ChOC-12) line cards, with the following limitation.
For APS to work properly, you must ensure that the OC-12 POS or ChOC-12 line card is installed in the lower-numbered (odd) slot.
The system receives clocking information from the line card in the odd slot. If you remove the odd-numbered card (or if the clocking mechanism on that card fails), the clocking is lost and the data path is shut down. (Caveat CSCdr81416)
To manage this APS behavior, we recommend the following:
1.
2.
Router(config)# redundancyRouter(config-r)# no associate 3 4Router(config-r-a-sl)# exitRouter(config)# interface pos 3/0/0Router(config-if)# shutdownYou can now remove the card in slot 3.
3.
Testing Performance of High-Speed Interfaces
Cisco IOS Release 12.0(17)SL is enhanced with multiple queues for all classes of traffic over high-speed interfaces. The software selects a queue based on the source and destination address for the packet. This ensures that a traffic flow always uses the same queue and the packets are transmitted in order.
When the Cisco 10000 series ESR is installed in a real network, the high-speed interfaces work efficiently to spread traffic flows equally over the queues. However, using single traffic streams in a laboratory environment may result in less-than-expected performance.
Therefore, to ensure accurate test results, you should test the throughput of the gigabit Ethernet, POS, or ATM uplink with multiple source or destination addresses.
Tip
Important Notes
This section contains issues that you should be aware of with Cisco IOS Release 12.0(17)SL.
Frame Relay and PPP Sessions
You can run up to 4200 Frame Relay sessions or 1300 PPP sessions, and you can configure up to 800 BGP peers on the Cisco 10000 series ESR. The router also supports up to 512 Multilink Point-to-Point (MLP) protocol sessions.
Note
Cisco Discovery Protocol
Starting with Cisco IOS Release 12.0(15)SL, the Cisco Discovery Protocol (CDP) is disabled by default. You can enable CDP on an interface using the cdp enable command.
Caveats
Table 2 describes the caveats for the Cisco 10000 series ESR running Cisco IOS Release 12.0(17)SL.
Table 2 Cisco IOS Release 12.0(17)SL Caveats
CSCdp96265
If you configure a DS3 BERT pattern 2^20-O153 on any unchannelized DS3 (by using the bert pattern 2^20-O153 interval 1-14400 command), and you then connect the line card to T-Bird 310 test set, the pattern does not synchronize with T-Bird 310.
Workaround: Use a different BERT pattern.
CSCdr19206
If you preconfigure a line card using the card command, this significantly degrades PRE performance.
Workaround: Do not use the card command to preconfigure line cards. Instead, use the no card command to remove references to cards that are not in the chassis.
CSCdr25441
The router sends out DHCP INFORM and DISCOVER messages containing an incorrect Ethernet address.
Workaround: No workaround is necessary. This caveat is harmless because these DHCP messages are not used to acquire IP addresses. They are used to gather environmental data such as the domain name server address.
CSCdr36564
When you use the Frame Relay autosense feature, the Cisco 10000 Series ESR sends all three LMI status message types immediately after the interface starts responding. However, sometimes the switch at the other end is not ready to receive messages and as a result, misses one or two messages that were sent. LMI autosense waits until the next scheduled interval (default is 1 minute) to send the messages again.
This problem primarily affects clear channel CT3 interfaces.
Workaround: There is currently no workaround.
CSCdr37991
If you configure an STS-1 on a ChOC-12 line card as unchannelized and then configure the remote side to send idle-character marks (namely, 0xFF), the T3 line stops responding and transmits a Remote Alarm Indication (RAI).
Workaround: When you use unchannelized T3 mode, configure the remote side to send idle-character flags (0x7E). To set this value, use the interface configuration mode idle-character command.
CSCdr43835
When you send large numbers of packets from the Gigabit Ethernet line card to the PRE in the Cisco 10000 Series ESR, you may lose a small number of packets. This only occurs for some packet sizes at very high bandwidths, with loss rates of a few parts per million.
Workaround: There is currently no workaround.
CSCdr62013
If large MLP configurations are in use, and you attempt to copy the configuration from a TFTP server directly into the running config, the copy may fail. Failures may include interfaces not appearing, or IPCP or LCP states not opening correctly.
Workaround: These failures are far less likely to occur if the configuration is copied to bootflash, and then from bootflash to the running config. Copy the configuration file to the startup config and then reload the router.
CSCdr81416
Limited support exists for APS. For detailed information, refer to the "Automatic Protection Switching Support" section.
CSCdr81671
On rare occasions, the system cannot retrieve remote performance data if you are using a ChOC-12 line card that has its T1s configured with ANSI FDL enabled.
Workaround: There is currently no workaround.
CSCdr84775
WRED does not drop outbound packets correctly on the Channelized T3 line card (CT3) in the default WRED configuration.
Workaround: Change the WRED policy to a non-default value.
CSCdr98341
The Flash disk can fall into the chassis when you insert the disk into the empty space to the right of the slot B in the PRE flash assembly.
Workaround: Pay extra attention when inserting a flash disk into the PRE flash assembly. Do not insert the disk in the empty space to the right of the slot B—if you insert a card in that space, it will fall into the chassis.
CSCds06423
Some MPLS packets are CEF switched when they should be label switched. This condition occurs if the Cisco 10000 ESR has two interfaces configured for label switching.
Workaround: Configure only one interface for label switching.
CSCds25069
The default logging parameter (logging rate-limit console all 10 except critical) sets console logging to disabled.
Workaround: Enter the logging console critical command to view the most important events such as card up/down and toaster failure events.
CSCds36324
Mass configuration (which occurs during boot/reload and can occur during link state changes) takes a long period of time (for example, more than 40 minutes for 2000 VCs associated with a main interface) with large numbers of PVCs (100s to 1000s). This problem occurs when you attempt to configure large numbers of PVCs on the main interface (or multipoint subinterfaces) with static maps on each PVC.
Workaround: Do not configure more than 500 PVCs on a single OC-12 ATM line card or more than 900 PVCs on a Cisco 10000 Series ESR.
CSCds40839
After you enter the show controller command, occasionally an alarm LED appears as active even though no alarms are indicated
Workaround: Perform a shut/no shut configuration on the SONET controller. For example:
conf tcontroller sonet 7/0/0shutno shutendCSCds41791
If you reload a Cisco 10000, some initialization messages are logged to the console before the startup-config is loaded. These initialization messages are transitional and may report an incorrect state, especially for the FastEthernet interface.
00:00:15: Downloading Microcode: file=system:pxf/ucode_file, version=2.0(21.4), description=Nightly Build Software created Wed 13-Sep-00 00:3800:00:21: %LINK-3-UPDOWN: Interface Ethernet0/0/0, changed state to up00:00:21: %LINK-5-CHANGED: Interface FastEthernet0/0/0, changed state to reset00:00:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0/0, changed state to up0:00:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0/0, changed state to downThese messages do not appear in the buffered log.
Workaround: Ignore these messages.
CSCds43837
The show atm pvc command displays "Unexpected QoS type" for its traffic parameters. This occurs when a PVC was previously configured with only an ATM vc-class, and then the vc-class was subsequently deleted.
For example:
sw-apollo-3(config)#vc-class atm testsw-apollo-3(config-vc-class)#vbr-nrt 1000 1000 10sw-apollo-3(config-vc-class)#exitsw-apollo-3(config)#int atm 3/0/0sw-apollo-3(config-if)#pvc 200sw-apollo-3(config-if-atm-vc)#class-vc testsw-apollo-3(config-if-atm-vc)#endsw-apollo-3#sh atm vcVCD / Peak Avg/Min BurstInterface Name VPI VCI Type Encaps Kbps Kbps Cells Sts3/0/0 1 0 200 PVC SNAP 1000 1000 10 UPsw-apollo-3#Now delete the vc-class :sw-apollo-3#conf tsw-apollo-3(config)#no vc-class atm testsw-apollo-3(config)#endsw-apollo-3#sh atm vcVCD / Peak Avg/Min BurstInterface Name VPI VCI Type Encaps Kbps Kbps Cells Sts3/0/0 1 0 200 PVC SNAP %Unexpected qos type UPWorkaround: Configure the vc directly using conventional means (non ATM vc-classes), or remove the vc and re-create it with a new ATM vc-class.
CSCds48362
The show interface output occasionally displays an extremely large number of configured VCs which do not really exist.
Workaround: There is currently no workaround.
CSCds49222
When a segment on a MPLS traffic engineered path is disabled, the PXF engine reloads, temporarily causing all forwarding to stop.
Workaround: There is currently no workaround.
CSCds49948
With multiple PVP tunnels, if the aggregate traffic received by one or more of the PVPs is heavily oversubscribed (starting at about 110% of the tunnel's PCR rate), the traffic on companion PVP tunnels on that interface may experience throughput that is lower than expected.
Workaround: There is currently no workaround.
CSCds49957
When you boot the Cisco 10000, the system may display the following messages:
*Oct 17 12:32:48.287: %SNMP-3-TRAPBLOCK: Attempt to generate SNMP trap from a process with blocking disabled-Traceback= 60565064 606A6B34 60678238 60678438 6067AD88 6067AF30 602FCBDC 6024817C 60248168Workaround: Ignore the messages.
CSCds50249
If incoming multicast packets match an input access list that has the log option enabled, the output of the show log command and show access-list commands display double the number of matches.
Workaround: There is currently no workaround.
CSCds63025
Line Protocol on one or two T1s may not come up when you perform a reload with a large configuration (for example, 1008 T1s with PPP encap or 504 MLPPPs).
Workaround: Reload the line card using the command hw slot slot_number reset.
CSCds63387
When a redundant power supply is removed or a line card is OIRed, SNMP traps are generated by the syslog mib. There is a request to generate these traps using the env, mon, and entity mibs respectively.
Workaround: Filter the SNMP traps using the syslog mib.
CSCds67459
When a serial interface is configured to be part of a MPLS/VPN, if you enter the no channelized command on the T3 controller, this clears the interface. However, the sh ip vrf vrf_name continues to show the interface as part of the vrf.
Workaround: The only way to eliminate unwanted interfaces in the vrf table is to reload the box.
CSCds68294
In the unlikely event of a total failure of the cooling fan tray, or any other scenario resulting in high-temperature operation, the Cisco 10000 continues running, and does not power off.
Workaround: If you observe fan failure or over-temperature alarms or log messages, immediately power off the chassis until the problem is corrected.
CSCds69465
Ping traffic does not resume after switching from an explicit path to a dynamic path.
Workaround: There is currently no workaround.
CSCds74846
When MPLS TE is configured and the logging console is turned on, the following error message appears repeatedly on the window:
"00:58:10: %TFIB-7-SCANSABORTED: TFIB scan not completing. MAC string updated."Workaround: Leave the logging console turned off.
CSCds86646
ISIS adjacencies recalculated with 65-85MB of tcp traffic to rtr.
Workaround: Because this problem is caused by hackers, we recommend that you use access lists to block out hackers. Access lists prevent packets from punting to the RP and taking down the router.
CSCds86767
A Cisco 10000 router running Release 12.0(10)SL may experience a buffer leak when interfaces are down but not administratively down.
Workaround: Administratively shut down the interfaces.
CSCdt00312
The flash file delete function may choose the wrong default device when you request deletion of a file from flash storage. The incorrect default used is slot0:.
Workaround: Prefix the filename with disk0: when specifying the filename.
CSCdt04686
During the reloading process, the match input-interface Serial3/0/0/1:0 configuration statement is not recognized and disappears from the configuration files after the Cisco 10000 is reloaded.
Workaround: Reenter the match input-interface Serial3/0/0/1:0 command.
CSCdt08501
PVCs in the down state can still pass traffic. When a PVP is created with associated F4 OAM VCs and those F4 OAM VCs do not come up (for instance, because there is no VP at the far end or the VP at the far end did not create F4 OAM VCs), traffic can still be passed on the PVCs associated with the PVP in question. When the F4 OAM loopback cells are not returned, Cisco IOS declares all PVP associated PVCs to be down. IOS does not, however, notify the forwarding engine or the line card. This allows traffic routed over the PVCs in question to pass.
Workaround: There is currently no workaround.
CSCdt21254
When the ACL is downloaded from the tftp server, the CPU advances to 100% utilization and several line cards lost IPC with the PRE and are reset.
Workaround: Do not configure all 8000 lines of ACL. Split the ACL into several smaller ACLs and download them separately.
CSCdt28444
In a chassis using TACACS security and running redundant PREs, you can access the console while the secondary PRE is cutting over to primary PRE. If no action is taken on the console for the length of the session timeout period, TACACS engages on the console. If the user does access the console during the cutover, the user enters exec mode (not enable mode).
Workaround: To help control security, set a short session timeout on the console port, and keep tight control of the enable password.
CSCdt38819
MALLOCFAIL with multicast traffic if a high rate of multicast traffic is sent out before multicast routing entries are updated.
Workaround: None. After the routing entries are updated, this problem disappears.
CSCdt47342
TFIB table failure.
Workaround: Currently none, but if you wait long enough the table updates.
CSCdt50540
Sometimes a traceback message is generated during an RPR+ switch over to the new primary PRE. A message similar to the following appears:
00:03:07: %IPC-5-INVALID: Sequence Structure port index=0x3-Traceback= 60321EC0 60322868 60806A54 603348C8 60359924 60025B94 602828CC 602828B8Workaround: This message is harmless. Ignore the message.
CSCdt54684
On rare occasions, if a large number of ds0 interfaces are configured on a CT3 line card, spurious memory error messages may appear.
Workaround: There is currently no workaround for this problem.
CSCdt55873
On rare occasions in which relatively high rates of bursty traffic are received on the OC-12 ATM line card, some packets may be dropped but not counted by the software.
Workaround: There is currently no workaround.
CSCdt57432
If you use snmpwalk or other similar tool to display the value of the different objects associated with a Cisco 10000, you can see that when an unchannelized DS3 controller has been created in a ChOC-12 line card, the configuration values of the DS3 MIB are not correct. If subsequent configuration commands are issued, the values displayed are correct. This problem probably exists in a channelized STM-1 line card as well, when in unchannelized DS3 mode.
Workaround: Rely on the outcome of the show controller t3 and show interface serial commands.
CSCdt57555
Verilink-hibit mode does not work on the Cisco 10000 with ChOC-12 line cards whose paths are configured in unchannelized DS3 mode. When the Verilink-hibit mode is chosen by the network administrator, Verilink-lowbit mode is programmed in the hardware instead.
Workaround: There is currently no workaround for this problem. You must use Verilink-lowbit mode.
CSCdt63838
Bad file magic number - cannot load bootflash.
Workaround: Perform the following:
a.
b.
c.
CSCdt64787
At the end of the line in the show run command output, 0.0.0.0 is appended randomly.
Workaround: Make sure that 0.0.0.0 is not in the running-config when saving it and then reusing it.
CSCdt65387
ChOC-12 DS3 subrate does not work in Kentrox mode at full bandwidth.
Workaround: Set the ChOC-12 interface to Digital Link mode and full bandwidth (no dsu bandwidth). This works the same as the Kentrox CSU/DSU when set to full bandwidth, and will work with scrambling enabled or disabled (set the same value at both ends).
CSCdt70049
With 500 Frame Relay interfaces on CT3 running IP Multicast, multicast packets get punted to the RP causing IPC OIR on the CT3. This causes the line protocol on the router connected to the Cisco 10000 to go down (and remain down) on some interfaces. The interface stats show no traffic over the affected interface. On the Cisco 10000 the Frame Relay PVC corresponding to it shows as Deleted.
Workaround: Perform a shut/no shut on the affected interface, or a hw-module slot reset on the line card to bring the line protocol back up.
CSCdt76746
In some cases, ATM counters display incorrect packet input values after receiving packets from several locations (for example, the line card, IOS, and the PXF forwarding engine).
Workaround: There is currently no workaround for this problem.
CSCdu10065
If you reload microcode, and you have changed IP addresses on interfaces just before you reload, traffic may be forwarded to an incorrect interface.
Workaround: Use the shutdown command to shutdown the interface experiencing the problem, and then reactivate it by using the no shutdown command.
CSCdu22374
When the Cisco 10000 series ESR is configured for 802.1q VLANs, the ouput of the show vlans command reports values that are higher than they should be, for the following parameters:
•
•
•
Workaround: There is currently no workaround.
CSCdu22652
If you perform a reload, the values for the transmitted and received output of the show vlans command indicates, incorrectly, that those values incremented.
Workaround: There is currently no workaround.
CSCdu25589
When the destination IP address of an incoming 802.1q packet matches one of the IP addresses of the router, the output of the show vlans command for 802.1q packets increments two times. Ping request packets, however, are always counted correctly regardless of destination.
Workaround: There is currently no workaround.
CSCdu25747
If you configure fair queueing on a frame relay interface with a large number of PVCs, and the traffic exceeds the link rate, several PVCs may experience a greater number of drops than other PVCs on that interface.
Workaround: There is currently no workaround.
CSCdu28935
When the interface on the remote end is set to be administratively down, and you are attemping to bring up the PPP protocol, the status of the interface alternate between down and up until the PPP protocol is up.
Workaround: There is currently no workaround.
CSCdu32435
If you configure 998 VPNs over VLAN, and you configure over 146 BGP routes per VPN, the BGP neighbor may start flapping.
Workaround: There is no workaround, but the problem is less likely to occur if you configure fewer than 146 BGP routes per VPN.
CSCdu34349
If you configure more than 100 BGP routes per VPN, and there are more than 200 VPNs configured on the system, CEF may not function properly after redistributing.
Workaround: Reduce the number of BGP routes per VPN to 100 or less.
CSCdu40483
If you enable multicast replication with an MLP bundle as the source, and the MLP broadcaster may exhibit behavior that is not compliant with MLP standards, then replication may not occur for all interfaces.
Workaround: If replication does not occur on all interfaces, reload the microcode.
Resolved Problems in Cisco IOS Release 12.0(17)SL
This section lists problems that are resolved in Cisco IOS Release 12.0(17)SL. For a list of problems that were resolved in previous Cisco IOS Releases, refer to the release notes for those particular versions.
CSCdr32279
When you enter the hw-module slot_number reset command, the event sequence appears in a different order than that shown by the reload command if the logging console is configured to informational.
CSCdr52081 and CSCdj94209
The PRE may crash if you repeatedly change a port back and forth from channelized to unchannelized.
Repeated conversions of a T3 port from channelized mode to unchannelized mode and back, with intervening assignments of IP addresses to the interfaces and ping testing, may cause the PRE crash.
CSCdr92058
Large multicast groups may cause CPU hog issues with PIM.
CSCds04367
When older CT3 line cards are powered on with live DS3 signals present at the receive BNC connector, the receive line interface device on the board may lock up, preventing the controller from running.
CSCds18665
If the interface between a PE (PE1) and CE router goes down, MPLS labels disappear at the far end provider edge peer (PE2) MPLS interface.
CSCds36117
If you enter the clear ip mroute command on a system with large multicast groups, CPU hog issues may arise that cause problems of moderate severity (such as losing keepalives).
CSCds51102
If you perform an SNMP walk or view entries in the if table, cef-layer internal interfaces appear in the interface table.
CSCds55667
Kentrox DS3 subrate mode does not work when you set it to full bandwidth (45.2 Mbps on Kentrox CSU, 44210 kbps on a Cisco 10000 Series ESR).
Workaround: Set the subrate mode on the ChOC-12 board to Digital Link mode, bandwidth = 44210. This fix works with and without scrambling.
CSCds86293
If you issue the dir or show slot0: or show slot1: command, the router reports Open device slot0 failed (Device not ready).
CSCds89640
If large OIDs (1024.1 fields) are sent to the router, the Cisco 10000 stops responding.
CSCds91966
If you delete a T1/E1, IP routes associated with subinterfaces are not removed.
CSCdt11390
On a Cisco 10000 system with channelized OC-12 line cards, the output of the show controllers command is incomplete and incorrect.
CSCdt31691
When a large number of VBR-nrt VCs are configured (200 and above) and the link transitions DOWN the host software running on the OC-12 ATM line card may take a SW Watchdog timeout, forcing the line card firmware to reload.
CSCdt34428
If you perform OIR on a line card configured for 768 PPP sessions with traffic running on all interfaces, some interfaces fail to come up. The show interface command displays the IPCP state as "Listen".
CSCdt42890
On rare occasions, line cards may not be recognized when you perform an OIR of multiple cards on a new system, or in a system in which the configuration was erased (for example, using write erase).
CSCdt63446
If an access-list with logging option enabled is attached to an interface, and you send traffic through the interface, this brings down all of the interfaces.
CSCdt67315
Under circumstances where ATM VCs are created and deleted on a regular basis, the OC-12 ATM segmenter firmware can transition to a state in which it drops some packets without counting them in a data stream where packet sizes alternate from small to large. This manifests itself in lower throughput.
CSCdt74932
When a TU-AIS is received at a particular TU in TUG3#3, the next TU at the T1 or E1 level contains data corruption as well.
CSCdt76739
If you remove an APS configuration for a ChOC-12 line card, followed by the show controllers sonet <high slot number, for example 2/0/0> or the show controllers sonet command, the Cisco 10000 crashes.
Other Resolved Caveats
This section includes caveats listed in previous release notes that are regarded as resolved because they are unreproducible or do not affect the behavior of the Cisco 10000 ESR. In the event a caveat listed in this section causes problems, please contact Cisco customer service.
For a list of unreproducible caveats in previous Cisco IOS Releases, refer to the release notes for those particular releases.
CSCdr47500
During periods of heavy traffic (approaching interface line rate), some interfaces may experience inconsistent performance between interfaces of the same type.
CSCdr72007
The number of VPNs that can be created on gigabit Ethernet subinterfaces is limited to under 100.
CSCdr82363
When the encapsulation mode is changed from PPP to HDLC or vice-versa, the system drops about 3 of the next 10 packets transmitted. After that, the packets are transmitted normally.
CSCdr82579
When a ChOC-12 line card is reconfigured from a channelized T3 configuration to an unchannelized T3 configuration or vice-versa, the initial packets are not forwarded.
CSCds01233
If you send a large number of small packets in large multicast groups, this may cause the following certain debug messages to appear on the console.
CSCds64134
Occasionally, after you reload routers (with background traffic load equal to no_drop rate), the throughput is some 3 to 400 pps below the expected rate.
CSCds65431
On rare occasions, after a single reload while under load, the Gigabit Ethernet line card is up but drops nearly all packets on the output queue.
CSCdt12602
If in a Frame-Relay environment a handful of interfaces are flapping continuously, the interface statistics report input errors (overruns) on the flapping interfaces.
CSCdt19582
Following a reload of the Cisco IOS software, the Gigabit Ethernet interface does not always come back up. The interface remains in the "GigabitEthernet1/0/0 is down, line protocol is down" state.
CSCdt25901
During a reload, if the router continuously receives IP packets, CPUHOG messages may appear in the log, and the router may take longer to come up.
CSCdt28191
After you reload line cards under background traffic load, one or more interfaces may not come up.
CSCdt33623
If you issue a write erase command on the primary PRE followed by an erase sec-nvram: command, and then reload both PREs simultaneously, some line cards may not be recognized correctly on reboot.
CSCdt40511
The Cisco 10000 crashed after several hours of testing with 500 CT3 ds0 interfaces configured for Frame Relay that were receiving multicast traffic at a rate of 10 pps of 260-byte packets.
CSCdt41680
ip address negotiate sends dhcp requests out all serial line interfaces.
CSCdt50591
In some test instances, Frame Relay interfaces did not correctly join a multicast group when it should have. The result is that multicast packets destined for those interfaces will be punted to the route processor. Enough packets cause the cpu usages on the route processor to run at a high usage.
CSCdt53363
On rare occasions, when a large number of ds0 interfaces is configured on a CT3 line card, buffer with corrupt pool pointer error messages may appear.
CSCdt63854
Under rare conditions in which scripts of VC creates and VC deletes are executed in turn, some VBR-nrt VCs are not created.
Obtaining Documentation
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World Wide Web
You can access the most current Cisco documentation on the World Wide Web at the following sites:
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•
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Documentation CD-ROM
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Ordering Documentation
Cisco documentation is available in the following ways:
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http://www.cisco.com/cgi-bin/order/order_root.pl
•
http://www.cisco.com/go/subscription
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Documentation Feedback
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You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:
Attn. Document Resource Connection
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Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.
Cisco.com
Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.
Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.
To access Cisco.com, go to the following website:
http://www.cisco.com
Technical Assistance Center
The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.
Contacting TAC by Using the Cisco TAC Website
If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:
http://www.cisco.com/tac
P3 and P4 level problems are defined as follows:
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In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.
To register for Cisco.com, go to the following website:
http://www.cisco.com/register/
If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:
http://www.cisco.com/tac/caseopen
Contacting TAC by Telephone
If you have a priority level 1 (P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
P1 and P2 level problems are defined as follows:
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