Table Of Contents
Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.2(2)SNH1
Determining the Software Version
New Hardware Features in Release 15.2(2)SNH1
New Software Features in Release 15.2(2)SNH1
Layer 2 Control Protocol Tunneling
Modified Software Features in Release 15.2(2)SNH1
Configuring Ethernet Virtual Connections
Release Notes for Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.2(2)SNH1
October 2012
OL-28112-01
This release notes is for the Cisco ASR 901 Series Aggregation Services Router for Cisco IOS Release 15.2(2)SNH1 and contains the following sections:
Introduction
The Cisco ASR 901 Series Aggregation Services Router is a cell-site access platform specifically designed to aggregate and transport mixed-generation radio access network (RAN) traffic. The router is used at the cell site edge as a part of a 2G, 3G, or 4G RAN.
Table 1 lists the Cisco ASR 901 router model versions.
Table 1 Cisco ASR 901 Router Models
TDM + Ethernet Version Ethernet Version•A901-12C-FT-D
•A901-4C-FT-D
•A901-6CZ-FT-D1
•A901-6CZ-FT-A2
•A901-12C-F-D
•A901-4C-F-D
•A901-6CZ-F-D1
•A901-6CZ-F-A2
1 DC power
2 AC power
Note Some of the Cisco ASR 901 models have port based licensing. For more details, see the Licensing chapter in Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide.
The Cisco ASR 901 router helps enable a variety of RAN solutions by extending IP connectivity to devices using Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Node Bs using High Speed Packet Access (HSPA) or Long Term Evolution (LTE), base transceiver stations (BTSs) using Enhanced Data Rates for GSM Evolution (EDGE), Code Division Multiple Access (CDMA), CDMA-2000, EVDO, or WiMAX, and other cell-site equipment.
It transparently and efficiently transports cell-site voice, data, and signaling traffic over IP using traditional T1 and E1 circuits, as well as alternative backhaul networks such as Carrier Ethernet and DSL, Ethernet in the First Mile (EFM), and WiMAX. It also supports standards-based Internet Engineering Task Force (IETF) Internet protocols over the RAN transport network, including those standardized at the Third-Generation Partnership Project (3GPP) for IP RAN transport. Custom designed for the cell site, the Cisco ASR 901 router features a small form factor, extended operating temperature, and cell-site DC input voltages.
System Specifications
Table 2 lists the supported system configurations for the Cisco ASR 901 router:
Memory Details
Table 2 lists the memory available for Cisco ASR 901 router.
Determining the Software Version
To determine the image and version of Cisco IOS software running on your Cisco ASR 901 router, log in to the router and enter the show version command in the EXEC mode:
Router> show versionCisco IOS Software, 901 Software (ASR901-UNIVERSALK9-M), Version 15.2(2)SNH1, RELEASE SOFTWARE (fc3)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2012 by Cisco Systems, Inc.Compiled Wed 10-Oct-12 19:48 by prod_rel_teamNew and Changed Information
•New Hardware Features in Release 15.2(2)SNH1
•New Software Features in Release 15.2(2)SNH1
•Modified Software Features in Release 15.2(2)SNH1
New Hardware Features in Release 15.2(2)SNH1
The Cisco IOS Release 15.2(2)SNH1 introduces four new variants of the Cisco ASR 901 10G Series Aggregation Services Router. The four SKUs of the router are as follows:
•A901-6CZ-FT-D (Ethernet + TDM with DC Power)
•A901-6CZ-FT-A (Ethernet + TDM with AC Power)
•A901-6CZ-F-D (Ethernet only with DC Power)
•A901-6CZ-F-A (Ethernet only with AC Power)
For more details about the Cisco ASR 901 10G router, see the Cisco ASR 901 10G Series Aggregation Services Router Hardware Installation Guide.
New Software Features in Release 15.2(2)SNH1
The following features are supported from this release:
ACL-based QoS
The access control list (ACL) based QoS feature provides classification based on source and destination IP. The current implementation of this feature supports only named ACLs.
For more information about this feature, see the Configuring QoS guide at the following URL: http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/qos.html
Inverse Multiplexing over ATM
The Inverse Multiplexing over ATM (IMA) technology is used to transport ATM traffic over a bundle of T1 or E1 cables, known as IMA group. This technology provides a scalable and cost-effective solution to expand WAN bandwidth from T1 speeds, without having to go for DS3 or OC3 circuits. With IMA, you can bundle two or more T1 circuits to effectively gain upward of 3 Mbps speed.
For more information about this feature, see Inverse Multiplexing over ATM guide at the following URL:
http://cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/ima.html
Layer 2 Control Protocol Tunneling
The Layer 2 Control Protocol Tunneling (L2PT) allows tunneling of Ethernet protocol frames across layer 2 switching domains.
For more information about this feature, see Layer 2 Control Protocol Peering, Forwarding and Tunneling guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/l2pt.html
TDM Local Switching
The Time-Division Multiplexing (TDM) local switching in E1 mode is supported from Cisco IOS Release 15.2(2)SNH1 onwards. This feature allows switching of Layer 2 data between two circuit emulation (CEM) interfaces on the same router.
For more information about this feature, see Pseudowire guide at the following URL:
http://cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/pseudowire.html
Modified Software Features in Release 15.2(2)SNH1
This section lists the features modified for this release:
Software Licensing
The 10gigUpgrade and Gige4portflexi licenses are available from Cisco IOS Release 15.2(2)SNH1 onwards. The 10gigUpgrade license is required to enable new 10G ports in the Cisco ASR 901 10G router. This license enables the router to function in 1G mode or 10G mode. The Gige4portflexi license is a combination of copper and SFP ports. This license is not tied to any port type.
For more information about this feature, see Licensing guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/lic.html
Configuring Ethernet Virtual Connections
The restrictions section of the Ethernet Virtual Connections feature is updated.
For more information about the update, see Configuring Ethernet Virtual Connections guide at the following URL:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/swevc.html
Limitations and Restrictions
Cisco IOS Release 15.2(2)SNH1 for the Cisco ASR 901 Series Aggregation Services Router has the following general limitations and restrictions:
Note For limitations and restrictions that are specific to features, see the respective feature guide.
•QinQ configuration for Layer3 is not possible with pop1 rewrite. However pop2 configured routed QinQ is supported.
•Default xconnect MTU is 9216.
•For interoperability with other routers for an xconnect session, ensure that the MTU on both PE routers is same before the xconnect session is established.
•VLAN IDs 4093, 4094, and 4095 are reserved for internal usage.
ACL
•Loopback feature should not be enabled when L2 Control Protocol Forwarding is enabled.
•Following IOS keywords are not supported on Cisco ASR 901—match-any, ip-options, logging, icmp-type/code, igmp type, dynamic, reflective, evaluate.
•Ingress PACL and RACL supports TCP/UDP port range; Egress ACL does not support port range.
•Sharing access lists across interfaces is not supported.
•ACL is not supported on Management port (FastEthernet) and serial interfaces.
•Devices in the management network (network connected to Fast Ethernet port) cannot be accessed from any other port. If the default route is configured on Cisco ASR 901 to fast ethernet interface (Fa0/0), all the routed packets will be dropped. However, this configuration could keep CPU busy and affect overall convergence.
Clocking
•External interfaces like BITS and 1PPS have only one port—they work either as an input interface or output interface at a given time.
•The line to external option for external SSU is not supported.
•ToD is not integrated to the router system time. ToD input or output reflects only the PTP time, not the router system time.
•Revertive and non-revertive modes work well only with two clock sources.
•BITS cable length option is supported via platform timing bits line-build-out command.
•There is no automatic recovery from OOR Alarms. It has to be manually cleared using clear platform timing oor-alarms command.
•If copper Gigabit Ethernet port is selected as the input clock source, the link should be configured as a IEEE 802.3 link-slave, using synce state slave command.
•BITS reports LOS only for AIS, LOS and LOF alarms.
•Loop timing is not supported in E1/T1 controllers. (IOS Command—clock source line). However, the clock can be recovered from T1/E1 lines and used to sync system clock using the IOS command network-clock input-source <prio> controller <E1/T1> 0/x.
IEEE 1588v2 (PTP)
•Ordinary clock slave and master mode is supported.
•Unicast Direct and Unicast Negotiation modes are supported; Multicast mode is not supported.
•PTP slave supports both single and two-step modes. PTP master supports only two-step mode.
•VLAN 4093 is used for internal PTP communication; do not use 4093 in your network.
•Loopback interface is used in Cisco ASR 901 router instead of ToP interface for configuring 1588 interface/IP address.
•The output 1pps command is not supported. Alternately, you can use the no input 1pps command.
•Sync and Delay request rates should be above 32pps, the optimum value being 64pps.
•Clock-ports even when configured as slave-only, start off as master. So the initial or reset state of the clock always shows as master. This implies that the master should have higher priority (priority1, priority2) for the slave to accept the master.
Supported Hardware
Table 3 shows the SFP modules supported on the Cisco ASR 901 Router:
Table 3
•CWDM-SFP-1470
•CWDM-SFP-1490
•CWDM-SFP-1510
•CWDM-SFP-1530
•CWDM-SFP-1550
•CWDM-SFP-1570
•CWDM-SFP-1590
•CWDM-SFP-1610
•DWDM-SFP-XXXX1
•GLC-BX-U and GLC-BX-D2
•GLC-EX-SMD
•GLC-LH-SMD
•GLC-LX-SM-RGD
•GLC-SX-MMD
•GLC-SX-MM-RGD
•GLC-T
•GLC-ZX-SM
•GLC-ZX-SMD
•GLC-ZX-SM-RGD
•SFP-10G-ER
•SFP-10G-LR
•SFP-10G-LR-X
•SFP-10G-SR
•SFP-10G-SR-X
•SFP-10G-ZR
•SFP-GE-L
•SFP-GE-S
•SFP-GE-T
•SFP-GE-Z
1 40 wavelengths
2 These SFPs (GLC-BX-U and GLC-BX-D) should be connected back to back to bring the interface link up.
SFPs Supported on the Cisco ASR 901 Router
Note For information on how to configure SFPs, see the Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide.
Supported MIBs
The Cisco ASR 901 router supports the following MIBs:
Caveats
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels. Only select severity 3 caveats are listed.
This section contains the following topics:
Using Bug Toolkit
The Caveats section only includes the bug ID and a short description of the bug. For details on the symptoms, conditions, and workaround for a particular bug you must use the Bug ToolKit. This section explains how to use the bug toolkit and has the following topics:
•Retrieve Saved Search or Bugs
Search Bugs
This section explains how to use the Bug ToolKit to search for a specific bug.
Step 1 Go to http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl.
You are prompted to log into Cisco.com. After successful login, the Bug Toolkit page opens.
Step 2 Click Launch Bug Toolkit.
Step 3 To search for a specific bug, enter the bug ID in the Search for Bug ID field and click Go in the Search Bugs tab.
To search for bugs in a specific release, enter the following search criteria:
•Select Product Category—Select Routers.
•Select Products—Select the required product from the list. For example, to view bugs for Cisco ASR 901, choose Cisco ASR 901 Series Aggregation Services Router from the list.
•Software Version—Choose the required Cisco IOS version from the drop-down lists. For example, to view the list of outstanding and resolved bugs in Cisco IOS Release 15.2(2)SNH1, choose 15.2 from the first drop-down list, 2 from the second drop-down list, and SNH1 from the third drop-down list.
•Search for Keyword(s)—Separate search phrases with boolean expressions (AND, NOT, OR) to search within the bug title and details.
•Advanced Options—You can either perform a search using the default search criteria or define custom criteria for an advanced search. To customize the advanced search, select Use custom settings for severity, status, and others and provide the following information:
–Severity—Select the severity level.
–Status—Select Open, Fixed, or Terminated.
Select Open to view all the open bugs. To filter the open bugs, clear the Open check box and select the appropriate sub-options that appear below the Open check box. The sub-options are New, Held, More, Open, Waiting, Assigned, Forwarded, Postponed, Submitted, and Information Required. For example, if you want to view only new bugs in Cisco IOS Release 15.2(2)SNH1, select New.
Select Fixed to view fixed bugs. To filter fixed bugs, clear the Fixed check box and select the appropriate sub-options that appear below the Fixed check box. The sub-options are Resolved or Verified.
Select Terminated to view terminated bugs. To filter terminated bugs, clear the Terminated check box and select the appropriate sub-options that appear below the terminated check box. The sub-options are Closed, Junked, and Unreproducible. Select multiple options as required.
–Advanced—Select the Show only bugs containing bug details check box to view only those bugs that contain detailed information, such as symptoms and workarounds.
–Modified Date—Select this option if you want to filter bugs based on the date on which the bugs were last modified.
–Results Displayed Per Page—Select the appropriate option from the list to restrict the number of results that appear per page.
Step 4 Click Search. The Bug Toolkit displays the list of bugs based on the specified search criteria.
Save Bugs
This section explains how to use Bug ToolKit to save the bugs retrieved by your search in a specific release.
Step 1 Perform a search.
Repeat Step 1 through Step 3 in the "Search Bugs" section.Step 2 Select the check boxes next to the bug you want to save in the Search Results page and click Save Checked.
The Save Bug Settings area appears under the Search Bugs tab.
Step 3 Specify group settings in the Place in Group field.
•Existing Group—Select an existing group.
•Create New Group—Enter a group name to create a new group.
Existing groups have their group notification options already set. If you select an existing group, go to Step 5.
Step 4 Specify the following email update (group notification) options.
•No emailed updates—Select if you do not want to receive email updates.
•Yes, email updates to—Enter your email address.
–On a schedule—Specify the frequency of email delivery.
Step 5 Click Save Bug.
The Bug ToolKit saves the selected bugs in the specified group.
Save Search
This section explains how to use Bug ToolKit to save your search after searching for the bugs in a specific release.
Step 1 Perform a search.
Repeat Step 1 through Step 3 in the "Search Bugs" section.Step 2 Click Save Search in the Search Results page to save your search with the specified criteria.
The Save Search Settings area appears under the My Notifications tab.
Step 3 Enter a name for your search in the Search Name field.
Step 4 Specify group settings in the Place in Group field.
•Existing Group—Select an existing group.
•Create New Group—Enter a group name to create a new group.
Existing groups have their group notification options already set. If you select an existing group, go to Step 6.
Step 5 Specify the following email update (group notification) options.
•No emailed updates—Select if you do not want to receive email updates.
•Yes, email updates to—Enter your email address.
–On a schedule—Specify the frequency of email delivery.
Step 6 Click Save Search.
The Bug ToolKit saves your search in the specified group.
Retrieve Saved Search or Bugs
This section explains how to use Bug ToolKit to retrieve a saved search or bugs.
Step 1 Go to http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl and click Launch Bug Toolkit.
You are prompted to log into Cisco.com.
Step 2 Click My Notifications tab.
My Notifications tab displays the Group Name, Summary, and Actions.Step 3 Click the group in the Group Name column. The group contains saved search and bugs.
Step 4 Retrieve saved search or bugs.
•Click the saved search name to display the Search Results page.
•Click the saved bug to display details or hover your mouse pointer over the Info link.
The My Notifications tab also provides option to delete bug, delete search, delete group, edit group notifications (in the Actions column), move selected saved search or bugs to different group, and to export saved bugs in all the groups to a spreadsheet.
Export to Spreadsheet
The Bug ToolKit provides the following options to export bugs to a spreadsheet:
•Click Export All to Spreadsheet link in the Search Results page under the Search Bugs tab. Specify file name and folder name to save the spreadsheet. All the bugs retrieved by the search is exported.
•Click Export All to Spreadsheet link in the My Notifications tab. Specify file name and folder name to save the spreadsheet. All the saved bugs in all the groups is exported.
If you are unable to export the spreadsheet, log into the Technical Support Website at
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC (1-800-553-2447).Open Caveats
This section provides information about the open caveats for the Cisco ASR 901 router running Cisco IOS Release 15.2(2)SNH1.
Closed Caveats
This section provides information about the closed caveats for the Cisco ASR 901 router running Cisco IOS Release 15.2(2)SNH1.
Bug ID DescriptionThe 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: 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
The counters are showing incorrect values for Layer 2 NNI and User-to-Network Interface (UNI) interfaces.
Reconfiguring EVCs of mixed type on a GigabitEthernet interface fails.
Junk values are displayed for class-default counters.
The configuration validation routine is not covering all illogical configurations.
QoS assertion fails and traceback is observed after deleting the policy-map attached to a MLPPP interface.
Traceback occurs after issuing show license status and license save commands.
Error occurs while trying to clear the Onboard Failure Logging (OBFL) information.
802.1Q Tunneling (QinQ) is not able to support multiple NNI ports.
Layer 2 traffic is failing with QinQ encapsulation between NNI interfaces over EVC.
The link connected over GigabitEthernet 0/11 is not coming up.
PTP is not working after reloading the master/slave router.
Troubleshooting
The following sections describe troubleshooting commands you can use with the Cisco ASR 901 Series Aggregation Services Router.
Collecting Data for Router Issues
To collect data for reporting router issues, issue the following command:
•show tech-support—Displays general information about the router if it reports a problem.
Collecting Data for ROMMON Issues
To collect data for ROMMON issues, issue the following command while in the EXEC mode:
•show rom-monitor—Displays currently selected ROM monitor.
Note If you contact Cisco support for assistance, we recommend that you provide any crashinfo files stored in flash memory. For more information about crashinfo files, see http://www.cisco.com/en/US/products/hw/routers/ps167/products_tech_note09186a00800a6743.shtml.
Related Documentation
Documents related to the Cisco ASR 901 Series Aggregation Services Router include the following:
•Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide
•Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
•Regulatory Compliance and Safety Information for Cisco ASR 901 Series Aggregation Services Routers
To access the related documentation on Cisco.com, go to:
http://www.cisco.com/en/US/partner/products/ps12077/tsd_products_support_series_home.html
Services and Support
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, 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
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
Release Notes for Cisco ASR 901 Aggregation Series Router for Cisco IOS Release 15.2(2)SNH1
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