Table Of Contents
Release Notes for Cisco 2600 Series for
Cisco IOS Release 12.0(5)XK2Determining Your Software Release
New Features in Cisco IOS Release 12.0(5)XK2
New Features in Cisco IOS Release 12.0(5)XK1
New Features in Cisco IOS Release 12.0(5)XK
Digital T1 Packet Voice Trunk Network Modules on Cisco 2600 Series Routers
Multiport T1/E1ATM Network Modules with Inverse Multiplexing over ATM on Cisco 2600 Series Routers
Open Caveats for Release12.0(5)XK2
Resolved Caveats for Release12.0(5)XK2
Open Caveats for Release12.0(5)XK1
Resolved Caveats for Release12.0(5)XK1
Novell IPX, XNS, and Apollo Domain
Cisco IOS Software Documentation Set
Cisco IOS Release 12.0 Documentation Set
Software Configuration Tips on Cisco's Technical Assistance Center Home Page
Release Notes for Cisco 2600 Series for
Cisco IOS Release 12.0(5)XK2
February 10, 2002
These release notes for Cisco 2600 series support Cisco IOS Release 12.0(5)XK2 and are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, microcode or modem code changes, and related document changes.
For a list of the software caveats that apply to Cisco IOS Release 12.0(5)XK2, see "Caveats" section.
Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.0 on Cisco Connection Online (CCO) and the Documentation CD-ROM.
Contents
These release notes describe the following topics:
Introduction
Cisco Systems extends enterprise-class versatility, integration, and power to branch offices with the Cisco 2600 series modular access router family. The Cisco 2600 series routers are modular access routers designed to enable customers to easily adopt future technologies and scale to accommodate network expansion. The Cisco 2600 series shares modular interfaces with the Cisco 1600, Cisco 1700, and Cisco 3600 series, providing a solution to meet today's branch office needs for applications such as:
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Secure Internet/intranet access
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The Cisco 2600 series modular architecture provides the versatility needed to adapt to changes in network technology as new services and applications become available. Driven by a powerful RISC processor, the Cisco 2600 series supports the advanced Quality of Service (QoS), security, and network integration features required in today's evolving enterprise networks.
System Requirements
This section describes the system requirements for Cisco IOS Release 12.0(5)XK2:
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Memory Requirements
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Hardware Supported
Cisco IOS Release 12.0(5)XK2 supports the Cisco 2600 series routers:
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Table 2 Supported Interfaces on the Cisco 2600 Series
1- or 2-port Ethernet (10BaseT)
Cisco 2610, Cisco 2611, Cisco 2612
1-port Token Ring (RJ-45)
Cisco 2612, Cisco 2613
1-port Ethernet
All Cisco 2600 series platforms
4-port Ethernet
All Cisco 2600 series platforms
1-port ATM-25 RJ-45 interface
All Cisco 2600 series platforms
16- or 32-port Asynchronous
All Cisco 2600 series platforms
4- or 8-port Asynchronous/ Synchronous Serial low speed
(128 kbps max)All Cisco 2600 series platforms
4-port T1 ATM network module with IMA (NM-4T1-IMA (=))
All Cisco 2600 series platforms
4-port E1 ATM network module with IMA (NM-4E1-IMA (=)
All Cisco 2600 series platforms
8-port T1 ATM network module with IMA (NM-8T1-IMA (=))
All Cisco 2600 series platforms
8-port E1 ATM network module with IMA (NM-8E1-IMA (=)
All Cisco 2600 series platforms
1-port, 24-channel T1 voice/fax module, supports 24 channels of medium-complexity codecs: G.729a/b, G.726, G.711 and fax or 12 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax. Consists of one NM-HDV, two PVDM-12s, and one VWIC-1MFT-T14 . Part number: NM-HDV-1T1-24(=)
All Cisco 2600 series platforms
1-port, enhanced 24-channel T1 voice/fax module, supports 24 channels of high- and medium-complexity codecs: G.729a/b, G.726, G.729, G.728, G.723.1, G.711, and fax. Consists of one NM-HDV, four PVDM-12s, and one VWIC-1MFT-T14. Part number: NM-HDV-1T1-24E(=)
All Cisco 2600 series platforms
2-port, 48-channel T1 voice/fax module, supports add/drop multiplexing (drop and insert); 48 channels of medium-complexity codecs: G.729a/b, G.726,G.711, and fax; or 24 channels of G726, G729, G723.1, G.728, G729a/b, G711, and fax. Consists of one NM-HDV, four PVDM-12, and one VWIC-2MFT-T1-DI4. Part number: NM-HDV-2T1-48(=)
All Cisco 2600 series platforms
High-density voice/fax network module spare (NM-HDV=)
Digital T1/E1 Packet Voice Trunk Network Modules spare component
12-channel packet voice DSP module upgrade spare (PVDM-12=)
Digital T1/E1 Packet Voice Trunk Network Modules spare component
1-port RJ-48 MultiFlex Trunk - T1 (VWIC-1MFT-T1(=))4
Digital T1/E1 Packet Voice Trunk Network Modules spare component
2-port RJ-48 MultiFlex Trunk - T1 (VWIC-2MFT-T1(=))4
Digital T1/E1 Packet Voice Trunk Network Modules spare component
2-port RJ-48 MultiFlex Trunk with drop and insert - T1 (VWIC-2MFT-T1-DI(=))4
Digital T1/E1 Packet Voice Trunk Network Modules spare component
1- or 2-port Channelized T1/ISDN PRI
All Cisco 2600 series platforms
1- or 2-port Channelized T1/ISDN PRI with CSU
All Cisco 2600 series platforms
1- or 2-port Channelized E1/ISDN PRI balanced
All Cisco 2600 series platforms
1- or 2-port Channelized E1/ISDN PRI unbalanced
All Cisco 2600 series platforms
4-or 8-port ISDN BRI S/T interface
All Cisco 2600 series platforms
4- or 8-port ISDN BRI U (NT1) interface
All Cisco 2600 series platforms
8- or 16-port Analog modems
All Cisco 2600 series platforms
1-Port T1 multiflex trunk interface (VWIC-1MFT-T1)
All Cisco 2600 series platforms
1-Port E1 multiflex trunk interface (VWIC-1MFT-E1)
All Cisco 2600 series platforms
2-Port T1 multiflex trunk interface (VWIC-2MFT-T1)
All Cisco 2600 series platforms
2-Port E1 multiflex trunk interface (VWIC-2MFT-E1)
All Cisco 2600 series platforms
2-Port T1 multiflex trunk interface with Drop and Insert (VWIC-2MFT-T1-DI)
All Cisco 2600 series platforms
2-Port E1 multiflex trunk interface with Drop and Insert (VWIC-2MFT-E1-DI)
All Cisco 2600 series platforms
1- or 2- Voice interface card slots
All Cisco 2600 series platforms
2-port FXS Voice/Fax interface card5
All Cisco 2600 series platforms with Voice/Fax network modules
2-port E&M Voice/Fax interface card3
All Cisco 2600 series platforms with Voice/Fax network modules
2-port FXO Voice/Fax interface card3
All Cisco 2600 series platforms Voice/Fax network modules
1-port ISDN BRI S/T interface (requires external NT1)
All Cisco 2600 series platforms
1-port ISDN BRI (NT1) U
All Cisco 2600 series platforms
1-port 56/64-kbps DSU/CSU
All Cisco 2600 series platforms
1-port T1/Fractional T1 with DSU/CSU
All Cisco 2600 series platforms
1-port High-Speed Serial (up to 2.048 Mbps)
All Cisco 2600 series platforms
2-port Dual High-speed Serial (up to 2.048 Mbps; Asynchronous/ Synchronous support)
All Cisco 2600 series platforms
2-port Asynchronous/ Synchronous (up to 128 kbps)
All Cisco 2600 series platforms
Data Compression AIM (up to 8.192 Mbps)
All Cisco 2600 series platforms
1 The Voice/Fax and ATM-25 network modules require Cisco IOS Plus feature sets.
2 The 1- or 2-port 10/100 Ethernet LAN interface for the Cisco 2621 and Cisco 2621 series routers is only available in Cisco IOS Release 12.0 XC and later.
3 Requires the Cisco IOS Plus feature sets.
4 See E1/T1 Multiflex Voice/WAN Interface Cards in this table.
5 Requires the NM-1V or NM-2V network module.
Determining Your Software Release
To determine the version of Cisco IOS software running on a Cisco 2600 series router, log in to the router and enter the show version EXEC command:
router>show versionCisco Internetwork Operating System SoftwareIOS (tm) 2600 Software (c2600-i-mz), Version 12.0(5)XK2, RELEASE SOFTWAREOther Firmware Code
The latest version of analog modem firmware for the Cisco 2600 series allows support of the internal analog modems in a wide range of countries. Firmware version 1.0.1 extends support internationally starting with Cisco IOS Release 11.3(5)T and later.
On CCO:
Service & Support: Documentation Home Page: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware
On the Documentation CD-ROM:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware
Feature Set Tables
Cisco IOS software is packaged in feature sets consisting of software images—depending on the platform. Each feature set contains a specific set of Cisco IOS features.
CautionCisco IOS images with strong encryption (including, but not limited to 168-bit (3DES) data encryption feature sets) are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States are likely to require an export license. Customer orders may be denied or subject to delay due to United States government regulations. When applicable, the purchaser or user must obtain local import and use authorizations for all encryption strengths. Contact your sales representative or distributor for more information, or send an e-mail to export@cisco.com.
and list the features and feature sets supported by the Cisco IOS Release 12.0(5)XK2 for the Cisco 2600 series.
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The following tables use the following conventions to identify features:
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New and Changed Information
The following sections list the new features supported by the Cisco 2600 series for Cisco IOS Release 12.0(5)XK2.
New Features in Cisco IOS Release 12.0(5)XK2
No new features are supported for the Cisco 2600 series in Cisco IOS Release 12.0(5)XK2.
New Features in Cisco IOS Release 12.0(5)XK1
No new features are supported for the Cisco 2600 series in Cisco IOS Release 12.0(5)XK1.
New Features in Cisco IOS Release 12.0(5)XK
The following features are available for the Cisco 2600 series in Cisco IOS Release 12.0(5)XK.
Digital T1 Packet Voice Trunk Network Modules on Cisco 2600 Series Routers
Digital T1 packet voice trunk network modules for Cisco 2600 series routers allow enterprises or service providers, using the equipped routers as customer premises equipment, to deploy digital voice and fax relay. These modules receive constant bit-rate telephony information over T1 interfaces and can convert that information to a compressed format, so that it can be transmitted as voice over IP.
The following high-density T1 network modules are available:
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T1 digital voice over IP includes the following functionality:
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This feature is supported on the following platforms:
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Multiport T1/E1ATM Network Modules with Inverse Multiplexing over ATM on Cisco 2600 Series Routers
Digital T1 packet voice trunk network modules allow Cisco 2600 series routers to provide T1 connectivity to PBXs or to a central office (CO). With digital T1 connectivity, Cisco 2600 series routers can provide greater voice density for enterprise and service provider VoIP networks than they could before. A digital T1 packet voice trunk network module is a complete solution, made up of a network module with installed packet voice data modules (PVDMs), and one T1 multiflex trunk voice/WAN interface card with either one or two T1 ports. The T1/E1 multiflex trunk interface cards are dual-mode T1 or E1 interfaces in a VWIC (Voice/WAN Interface Card) form for voice, data, and integrated voice/data applications. The following T1/E1 multiflex trunk interface cards are available:
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The T1/E1 VWICs support the following T1/E1 functionality:
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This feature is supported on the following platforms:
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Important Notes
This section contains important information about use of your Cisco IOS Release 12.0(5)XK2 software.
Cisco IOS release 12.0(5)XK2 is supported on all Cisco 2600 series routers and incorporates a number of bug fixes and enhancements. These include improvements to the echo canceller located within the DSP firmware. These improvements result in better performance during off-net calls and within noisy environments.
Refer to the Caveats section for details on individual bug fixes found within this release.
Deprecated MIBs
Older Cisco Management Information Bases (MIBs) will be replaced in a future release. OLD-CISCO-* MIBS are currently migrated into more scalable MIBs, without affecting existing Cisco IOS products or NMS applications. Application developers should update from deprecated MIBs to the replacement MIBs as shown in the following table.
Caveats
Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 are less serious.
This section only contains open and resolved caveats for the current Cisco IOS maintenance release.
All caveats in Release 12.0 and Release 12.0 T are also in Release 12.0(5)XK2.
For information on caveats in Cisco IOS Release 12.0, see Caveats for Cisco IOS Release 12.0 that describes caveats affecting all maintenance releases.
For information on other caveats that also apply to this release, see Caveats for Cisco IOS Release 12.0 T which lists severity 1 and 2 caveats, and is located on CCO and the Documentation CD-ROM
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Open Caveats for Release12.0(5)XK2
There are no open caveats specific to Cisco IOS Release 12.0(5) XK2 that require documentation in the release notes.
Resolved Caveats for Release12.0(5)XK2
All the caveats listed in this section are resolved in Cisco IOS Release 12.0(5) XK2. This section describes only severity 1 and 2 caveats and select severity 3 caveats.
SNMP
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An error can occur with management protocol processing. Please use the following URL for further information:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Open Caveats for Release12.0(5)XK1
This section describes possibly unexpected behavior by Release 12.0(5)XK1. Unless otherwise noted, these caveats apply to all 12.0 releases up to and including 12.0(5)XK1.
Basic System Services
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Brings IOS up to RFC 2217 spec. Adds in extra flow control for faxing through IOS. Corrects [now ignores] software flow control issue.
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Error messages are generated by RSP routers with VIP cards in some cases. The error messages are generally benign, indicating temporarily out of memory situations, which are then recovered from.
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SegV Exception in peer_list_sum, NTP related
When utilizing ntp private mode and control type messages for remote query, it is possible to see a router crash or traceback messages.
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If sh run or wr t are issued at exactly the same time from two different VTY, one session may finish before the other and trash a variable that still need to be used by the 1st session which causes a router crash.
Workaround: Don't do sh run at the same time from 2 VTY's.
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If you have a Vip2-50 with a ESA module for hardware encryption, you might be seeing this problem. Execute show version and look for 12.0.5, if rsp-dsv56i-mz.120-5 show interface stat and look for...
Router # sh int stat FastEthernet4/0/0 Switching path Pkts In Chars In Pkts Out Chars Out Processor 169 17028 5866912 2018892867 Route cache 5866778 2019797528 0 0 ^^^notice no route cache^^ Distributed cache 0 0 0 0 Total 5866948 2019815576 5866912 2018892867Serial5/0/0 Switching path Pkts In Chars In Pkts Out Chars Out Processor 5964672 1993916338 530 37168 Route cache 0 0 5958298 1967889708 ^^^notice no route cache^^ Distributed cache 0 0 0 0 Total 5964672 1993916338 5958828 1967926876•
The use of the command backup interface bri 0 breaks the tdm-group command under the T1/E1 controllers in Cisco IOS 12.0(5)XK. Removing the command, saving the config to nvram, and reloading doesn't resolve the problem. The user must either:
write erase and reload
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boot the router ignoring vnram
Reconfigure the router without the faulty command. The work-around is to disable ISDN backup.
IBM Connectivity
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A Cisco router using Advanced Peer-to-Peer Networking (APPN) may consume excessive CPU while issuing messages during a Locate storm. In particular, message: XXXTPD02_LOGMSG_01 can be issued repetitively.
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APPN Network Node router fails to allocate the conwinner session of its dual CP-CP session with an adjacent End Node. The conloser session will be setup correctly, but the conwinner sessions fails with sense 80140003 as indicated in the debug appn ss. The problem results after changing an adjacent Network Node to an End Node. The workaround is to cycle the link for this End Node.
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Router may crash when creating a circuit history for a DLSw lite circuit.
Workaround is to disable circuit history logging by configuring no dlsw history-log.
Interfaces and Bridging
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If an interface on a HSSI 1 port (PA-H or H1T+) card goes down/down and you see the following error message, you may be experiencing this problem:
%MUSELIX-1-STOPFAIL: XXXX: Stop Failed at disable port (XXXX = the interface affected) %MUSELIX-1-STARTFAIL: XXXX: Start Failed at enable port MUESLIX-1-FAILURE_CAUSE: SerialX/X:This problem is caused by several factors.
Once it falls into this state, execute the following (undocumented) test commands -- (<CR> is a carriage return):
term len 0<CR> sh cont h 1/0<CR> test tpu b<CR> 1/0<CR> g<CR> x<CR> y<CR> r<CR> s<CR> 3<CR> q<CR> test tpu b<CR> 1/1<CR> g<CR> x<CR> y<CR> r<CR> s<CR> 3<CR> q<CR> test len 24<CR>
An example of this process can be obtained by using Bug Navigator II.
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Resolved Caveats for Release12.0(5)XK1
All caveats listed in this section are resolved in Release 12.0(5)XK1. This section only describes severity 1 and severity 2 caveats.
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Crashed happened on routing_svc, switching_svc, and bridging_svc HAWK testing after the configuration is done. It is in version 12.0(5.1)PI6.
The same problem is also seen on 12.0(19990715:065145) [BLD-v120_5_xk_throttle.990714 109] where is stack trace is the same.
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Regression of BVM (qsig) failed to pass the SETUP to the PBX (i.e., making an outgoing call). Apparently, some code changes for other boxes introduced the problem. A new field called bchan_reassigned is added to the isdn_bri structure. This structure is used to make calls to routines such as process_bri_call. For the MC3810, we have an api (ccsapi.c) to translate ccs api messages to isdn host messages, the person(s) who add this field forgot to initialize the field for this api, and thus contains garbage.
This is causing the "UKNOWN BCHANNEL" problem shown by the regression.
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Clocking configuration information may be over written if the hw work-around software is running while a clocking config change is made.
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Cannot configure more than one channel-group on E1.
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In FRF8, the IWF is setting the DE bit of the FR frame only if the last cell of a AAL5 pack has the CLP bit set. According to the FRF.8 spec, the DE bit should be set if any of the cells of a fragmented AAL5 packet has the CLP bit set.
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FRF.8 ATM PVCs cannot be removed if the corresponding FR VCs are not configured on the IWF.
Caveats for Release12.0(5)XK
This section describes possibly unexpected behavior by Release 12.0(5)XK. Unless otherwise noted, these caveats apply to all 12.0 releases up to and including 12.0(5)XK.
Basic System Services
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Under noisy line conditions, a giant packet followed by a runt packet on a serial line causes a Cisco 2600 router to crash or report spurious accesses.
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The correct buffer size should be determined before zeroing out the buffer.
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When a customer repeatedly executed the command write term, a GSR shut down due to environmental alarms. The env table, which is used to compare with measured readings, was corrupted.
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An NTP-related SegV Exception occurs in peer_list_sum.
When NTP private mode is used with control type messages for remote queries, a router can crash or issue traceback messages.
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On the Cisco MC3810, comfort-noise generation cannot be disabled.
Workaround: Disable VAD, as comfort noise is only applicable when VAD is engaged.
IBM Connectivity
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Environment: DLSW direct encapsulation serial link WAN with Ethernet LAN on one side and Token Ring LAN on the other.
Observed Problem: Connections are only established from the Token Ring side.
Workaround: Raise the MTU of the serial WAN to 1800 bytes or so.
Fix: The code will be altered to allow connections from Ethernet end stations even with the WAN MTU at 1500. Network administrators must make sure that no packets of 1500 bytes (pre-encapsulation) come in off the LAN. This sets up the possibility of hung sessions with oversized packets, but it allows well-configured networks to run without modification.
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A router crashed from a bus error at PC _lnm_add_entry, probably because it received a frame on its Token Ring interface that pertains to LNM and also has its RIF length greater than 7 hops.
Workaround: Try deactivating LNM REM with the no lnm rem command.
Interfaces and Bridging
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If an interface on a HSSI 1 port (PA-H or H1T+) card goes down/down and you see the following error message, that you may be experiencing this problem:
%MUSELIX-1-STOPFAIL: XXXX: Stop Failed at disable port (XXXX = the interface affected) %MUSELIX-1-STARTFAIL: XXXX: Start Failed at enable port MUESLIX-1-FAILURE_CAUSE: SerialX/X:
This problem is caused by several factors.
Once it falls into this state, execute the following (undocumented) test commands (<CR> is a carriage return):
term len 0<CR> sh cont h 1/0<CR> test tpu b<CR> 1/0<CR> g<CR> x<CR> y<CR> r<CR> s<CR> 3<CR> q<CR> test tpu b<CR> 1/1<CR> g<CR> x<CR> y<CR> r<CR> s<CR> 3<CR> q<CR> test len 24<CR>
An example of this process can be obtained by using Bug Navigator II.
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A PA-4R-DTR port may reset under the following circumstances:
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When this problem occurs, the PA-4R-DTR port resets, and the ring experiences a beacon.
Workaround: Make sure the DTR port is not the active monitor on the ring. Ensure that the MAC address of the DTR card is not the highest MAC address on the physical ring.
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With the following input-type-list, the router doesn't respond to an ARP request. Without the list or with the addition of a line for ARP packets, it works. You can still ping the interface IP address but not the HSRP address.
interface Ethernet0/0 ip address 13.13.13.1 255.255.255.0 standby 143 priority 110 preempt standby 143 ip 13.13.13.254 bridge-group 1 bridge-group 1 input-type-list 201 !
Workaround: Delete the input access lists on the bridge interface or permit the type 0x0806 in the access list.
IP Routing Protocols
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Symptom: Lock and Key idle timer is taking too long to time out. The idle timeout, as configured by the autocommand access-enable command, is taking too long to time out. While the logging is on for access list hits, the time that it takes to idle out (with no access list hits) is up to two times the length configured.
Conditions: If the dynamic entry is created by the Lock and Key feature that requires the user Telneting into the router, then the idle timeout takes up to two times the length configured by using the autocommand access-enable host timeout minutes command.
Workaround: Suggest customers that are running 11.1 series of images with this problem to upgrade to 11.2.
Further problem description:
There are two fixes for this problem.
The first problem was that the router refreshes the last-hit timer against all the traffic coming into the interface instead of refreshing the timer only when the traffic matched the created dynamic access list.
The fix is to perform the checking of the source address of packets against the source address in the dynamic access list. If there is a match, then the last hit time stamp is refreshed.
The second problem is that when the last packet comes in really close to the creation time of the dynamic entry, the new delta time for the next expiration could be less than zero, due to the real timer event being processed later than the exact scheduled timeout. The timer routine figures out the next expiration time by using the total idle timer value minus the time elapsed since the last reference timestamp. But the timer routine is scheduled later than the expected expiration time due to other activities in the router.
last reference calculated expiration time (3 minutes) | (2 seconds) | v v |----------|----------|---------|----- ^ ^ | | +-- dynamic ACL is created +-- the timeout event get processed (3 minutes and 5 seconds)The elapsed time (now timestamp minus last reference timestamp) is 3 minutes and 3 seconds (3 minutes 5 seconds minus 2 seconds), which is greater than 3 minutes as shown above. We should only extend the expiration time for one minute (due to the timer unit is 1 minute), but the old implementation extended a whole idle time (3 minutes) instead of 1 minute.
The fix for the second problem is to set the next expiration time of the idle timeout to be 1 minute from now.
Miscellaneous
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When running NAT and encryption, FTP fails, but Telnet and ping work. The TCP checksum is not calculated correctly. Removing NAT or encryption resolves the problem.
For performance reasons, decryption is not done until the packets are switched to the output interface. This caused the problem with IOS NAT, because NAT may need to do the payload translation for certain protocols. The affected protocols include FTP and NetBios, for example.
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When you configure Bisync (encapsulation bstun) with the ASCII character set (bsc char-set ascii) on the first port of a serial WIC (1T, 2T, or 2A/S) in WIC slot 0 of a Cisco 2600 series router, only the first character of each frame is received, and the BSTUN tunnel is not established. This only affects Bisync mode when it is configured with the ASCII character set. Other encapsulations are not affected, and use of the EBCDIC character set with Bisync works correctly.
For the first serial port in WIC slot 0, the parity detection is not configured correctly for Bisync in ASCII mode. The first character of each frame generates a parity error that causes the receiver to discard the frame after the first character received.
Workaround: Use a different serial port, either the second serial port (port 1) on a 2T or 2A/S WIC in WIC slot 0, or any serial port in WIC slot 1. If you have only one serial WIC, moving it from WIC slot 0 to WIC slot 1 fixes this problem.
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Encryption does not work properly with following hardware combination: 7500, VIP2-40, PA-2CE1 (or PA-CE1) when the channelized E1 interface is configured for Frame Relay.
The problem is related to distributed services, and only the channelized E1 PAs on the VIP2-40 are affected.
Workaround: Use VIP2-15 instead of VIP2-40.
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In Release 11.2P and 11.3, when Fast Ethernet subinterfaces are configured for encryption and the crypto map is only applied to the main interface with the IP address configured in the subinterface, the packets can be switched in the clear. In Release 12.0, enabling CEF can cause the packets to be dropped.
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When tunneling IPX over an IP tunnel, and when using an extended inbound access list for IP on the tunnel interface, the IPX traffic is blocked by the access list.
Workaround: Add a permit gre statement in the extended access list.
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If Token Ring is the endpoint of an encrypted tunnel, extra packets are generated.
Symptoms are a high CPU load (mainly taken by the crypto engine) and bogus addresses when you enable the debug tunnel command.
Workaround: Use the interface command tunnel sequence-datagrams on both endpoints of the tunnel.
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A PA-A3 ATM Enhanced Port Adapter may cause a VIP crash. Console messages like the following one appear:
%ATMPA-3-BADPARTICLE: ATM0/0: bad rx particle 0x605C7C80 index 282 -Traceback= 6015D550 60170C50 60171B78 600A8FB4
The show diag command for that VIP displays an address error (load or instruction fetch) exception.
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The Cisco 1700 Fast Ethernet interface receives input errors when small packets (less than 200 bytes) are received while the interface is receiving 500 packets per second and running fast switching.
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A Cisco AS5300 may crash when running very high traffic (60 pps on all 96 channels) with calls are being setup and torn down continuously.
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If VAD is enabled on VoFR/VoATM calls on a Cisco MC3810, there may be significant voice quality degradation.
Workaround: Disable VAD by placing a no vad statement in all VoFR or VoATM dial peers.
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If the IDB is not defined, IPSec crashes. There is no known workaround. See CSCdm52531 for a description.
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An ATM subinterface drops packets when distributed CEF is disabled
The problem only occurs on subinterfaces created after DCEF was on and then turned off.
Workaround: Enable and then disable DCEF after creating a new subinterface.
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PA-A2 may cause memory corruption if you are using SVCs with ARP server when you shut down the interface.
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SS-EVAL GWs running 12.0(5)T ignore or discard RAS messages that contain cleartokens other than settlement cleartokens. This can prevent the establishment of calls when interacting with vendor systems that include cleartokens where the OBject IDs in the nonStandarParameter fields are coded to be anything other than OSP cleartokens.
Novell IPX, XNS, and Apollo Domain
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Images without the IPX-EIGRP subsystem have high CPU load due to continually triggering an attempt to process EIGRP-specific service information when no information is present. There is no workaround.
Wide-Area Networking
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All platforms running MLP can encounter a transient error condition where no links are assigned to a multi-link bundle.
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A Cisco 4000 series router can crash when configuring LECS, LES/BUS, and LEC on the router. This crash occurs on 11.3(9)WA4(11.1). There is no workaround.
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In a multi-chassis MLP stack group where two stack group members cross project MLP link interfaces, one of the stack group member may crash. There is no workaround.
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It is not possible to change the status of channel 31 (the 32nd channel) in an ISDN E1.
Related Documentation
The following sections describe the documentation available for the Cisco 2600 series These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents.
Documentation is available as printed manuals or electronic documents, except for feature modules, which are available online on CCO and the Documentation CD-ROM.
Use these release notes with these documents:
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Release-Specific Documents
The following documents are specific to Cisco IOS Releases 12.0 T and 12.0, on which Release 12.0(5)XK1 is based and located on CCO and the Documentation CD-ROM:
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On CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes
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Service & Support: Technical Documents
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As a supplement to the caveats listed in the "Caveats" section in these release notes, see Caveats for Cisco IOS Release 12.0 T which contains caveats applicable to all platforms for all maintenance releases of Release 12.0 T. Caveats for Release 12.0(5)T apply to Release 12.0(5)XK1.
On CCO:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Caveats: Caveats for Cisco IOS Release 12.0 T
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS 12.0: Caveats: Caveats for Cisco IOS Release 12.0 T
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Platform-Specific Documents
These documents are available for the Cisco 2600 on CCO and on the Documentation CD-ROM.
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On CCO:
Service & Support: Documentation Home Page: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers
On the Documentation CD-ROM:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers
Feature Modules
Feature modules describe new features supported by Cisco IOS Release 12.0 T and 12.0(5)XK1, and updates to the Cisco IOS documentation set. A feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the feature modules are available online only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set.
On CCO:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation
Cisco IOS Software Documentation Set
The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents which are shipped with your order in electronic form on the Documentation CD-ROM—unless you specifically ordered the printed versions.
Documentation Modules
Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, Cisco IOS software functionality, and comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Each configuration guide can be used in conjunction with its corresponding command reference.
On CCO:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
Cisco IOS Release 12.0 Documentation Set
describes the contents of the Cisco IOS Release 12.0 software documentation set. The document set is available in electronic form and also in printed form upon request.
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On CCO:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References.
Service and Support
For service and support for a product purchased from a reseller, contact the reseller, who offers a wide variety of Cisco service and support programs described in "Service and Support" of Cisco Information Packet that shipped with your product.
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For service and support for a product purchased directly from Cisco, use CCO.
Software Configuration Tips on Cisco's Technical Assistance Center Home Page
If you have a CCO login account, you can access the following URL, which contains links and tips on configuring your Cisco products:
http://www.cisco.com/kobayashi/serv_tips.shtml
This URL is subject to change without notice. If it changes, point your Web browser to CCO and click on this path: Products & Technologies: Products: Technical Tips.
The following sections are provided from the Technical Tips page:
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Cisco Connection Online
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
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For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
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Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
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