Table of Contents

Contents
Introduction

Early Deployment Releases

System Requirements

Memory Requirements
Hardware Supported
Determining Your Software Release
Upgrading to a New Release
Feature Set Table

New and Changed Information

New Features in Release 12.0(2)XD

ISDN BRI VIC

New Features in Release 12.0(1)T

CLI String Search
Cisco IOS Firewall Feature Set Platform Support
Data Compression Advanced Interface Module
Mobile IP
Time-Based Access Lists

Important Notes

Deprecated MIBs

Caveats

Open Caveats - Release 12.0(2)XD

Basic System Services
DECnet
IBM Connectivity
Interfaces and Bridging
IP Routing Protocols
ISO CLNS
Miscellaneous
Wide-Area Networking

Resolved Caveats - Release 12.0 T

IP Routing Protocols
Miscellaneous
Novell IPX, XNS, and Apollo Domain

Related Documentation

Release-Specific Documents
Feature Modules
Platform-Specific Documents
Cisco IOS Software Document Set

Documentation Modules and Indexes
Release 12.0 Documentation Set

Service and Support

Software Configuration Tips on the Cisco TAC Home Page

Cisco Connection Online
Documentation CD-ROM

Release Notes for Cisco 2600 Series for
Cisco IOS Release 12.0(2)XD

December 7, 1999

These release notes describe new features for the Cisco 2600 series routers that support Cisco  IOS Release  12.0(2)XD. Cisco IOS Release 12.0(2)XD is based on Cisco  IOS Release 12.0(2)T.

Use these release notes in conjunction with the cross-platform Release Notes for Cisco IOS Release  12.0 T  located on Cisco Connection Online (CCO) and the Documentation CD-ROM.

For a list of software caveats that apply to Release 12.0(2)XD, refer to the "Caveats" section.

Contents

These release notes discuss the following topics:

• Introduction

• System Requirements

• New and Changed Information

• Important Notes

• Caveats

• Related Documentation

• Service and Support

• Cisco Connection Online

• Documentation CD-ROM

Introduction

Cisco 2600 series routers are cost-effective, modular access routers designed to enable customers to easily adopt future technologies and scale to accommodate network expansion, thereby protecting technology investments. The Cisco 2600 series offers network managers and service providers an attractively-priced solution for extending the versatility, integration, and power of the Cisco 3600 series to smaller branch offices. The Cisco 2600 shares modular interfaces with the popular Cisco  1600 and Cisco 3600 series, offering a solution both for today's branch office needs and increasing demands for applications such as:

• Multiservice data/voice/video integration

• Departmental dial services

• Extranet/VPN access

• Serial device concentration

Early Deployment Releases

This release notes is based on the Cisco 2600 for Cisco IOS Release 12.0(2)T. Release 12.0 T is an Early Deployment (ED) release, delivering both fixes to software caveats and support for new Cisco hardware. The following table briefly describes some of the ED releases currently available for the Cisco 2600 series.

Table 1: Early Deployment Releases for the Cisco 2600 Series

ED Release	Maintenance Release	Availability	Additional Software Features	Additional Hardware Features
Release 12.0 XD	2	Now	ISDN BRI Voice over IP	N/A
Release 12.0 XC	2	Now	N/A	Cisco 2620, Cisco 2621 - Fast Ethernet
Release 12.0 T	2	Now	N/A	N/A
Release 11.3 T	7	Now	N/A	N/A

System Requirements

This section describes the system requirements for Release 12.0(2)XD and includes the following sections:

• Memory Requirements

• Hardware Supported

• Determining Your Software Release

• Upgrading to a New Release

• Feature Set Table

Memory Requirements

Table 2 describes the memory requirements of the Cisco IOS feature sets for the Cisco 2600 series for Release 12.0(2)XD. All "Plus" feature sets include voice network support.

Table 2: Memory Requirements for the Cisco  2600 Series

Feature Set by Platform	Image Name	Required Flash Memory	Required DRAM Memory	Runs From
IP Plus	c2600-is-mz	8 MB	20 MB	RAM
IP Plus 40	c2600-is40-mz	8 MB	24 MB	RAM
IP Plus 56	c2600-is56-mz	8 MB	24 MB	RAM
IP Plus IPsec 56	c2600-is56i-mz	8 MB	24 MB	RAM
IP/FW Plus IPSec 56	c2600-ios56i-mz	8 MB	24 MB	RAM
IP/IPX/AT/DEC Plus	c2600-ds-mz	8 MB	20 MB	RAM
IP/IPX/AT/DEC/FW Plus	c2600-dos-mz	8 MB	24 MB	RAM
Enterprise Plus	c2600-js-mz	8 MB	24 MB	RAM
Enterprise Plus 40	c2600-js40-mz	8 MB	24 MB	RAM
Enterprise Plus 56	c2600-js56-mz	8 MB	24 MB	RAM
Enterprise Plus IPsec 56	c2600-js56i-mz	8 MB	32 MB	RAM
Enterprise/APPN Plus	c2600-ajs-mz	8 MB	32 MB	RAM
Enterprise/APPN Plus 40	c2600-ajs40-mz	8 MB	32 MB	RAM
Enterprise/APPN Plus 56	c2600-ajs56-mz	8 MB	32 MB	RAM
Enterprise/APPN Plus IPsec 56	c2600-ajs56i-mz	8 MB	32 MB	RAM
Enterprise/FW Plus 56	c2600-jos56-mz	8 MB	24 MB	RAM

Hardware Supported

Cisco IOS Release 12.0(2)XD supports the Cisco  2600 series routers:

• Cisco  2610

• Cisco  2611

• Cisco  2612

• Cisco  2613

For detailed descriptions of the new hardware features for Release 12.0, refer to the cross-platform Release Notes for Cisco IOS Release 12.0 .  Table 3 lists the interfaces supported on the Cisco 2600 series.

Table 3: Supported Interfaces on the Cisco  2600 Series

Interface, Network Module, or Data Rate1		Platforms Supported
LAN Interfaces	1- or 2-port Ethernet (10BaseT)	Cisco  2610, Cisco  2611, Cisco  2612
	1-port Token Ring (RJ-45)	Cisco  2612, Cisco  2613
LAN Network Modules	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
Serial Network Modules	6- 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
Dial, ISDN and Channelized Serial Network Modules	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
Voice/Fax Interface Cards	2-port ISDN BRI S/T TE Voice interface card	All Cisco  2600 series platforms
	1- or 2- Voice interface card slots	All Cisco  2600 series platforms
	2-port FXS Voice/Fax interface card2	All Cisco  2600 series platforms with Voice/Fax network modules
	2-port E&M Voice/Fax interface card2	All Cisco  2600 series platforms with Voice/Fax network modules
	2-port FXO Voice/Fax interface card2	All Cisco  2600 series platforms Voice/Fax network modules
WAN Interface Cards	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; Synchronous/ Synchronous support)	All Cisco  2600 series platforms
	2-port Asynchronous/ Synchronous (up to 128 kbps)	All Cisco  2600 series platforms

1The Voice/Fax and ATM-25 network modules require Cisco IOS Plus feature sets. 2This interface card requires the NM-1V or NM-2V network module.

Determining Your Software Release

To determine the version of Cisco IOS software currently running on a Cisco  2600 router, log into the router and use the show version EXEC command. The following is sample output from the show version command. The version number is indicated on the second line as shown below:

Cisco Internetwork Operating System Software 
IOS (tm) 2600 Software (c2600-is-mz), Version 12.0(2)XD, RELEASE SOFTWARE
 

Additional command output lines include more information, such as processor revision numbers, memory amounts, hardware IDs, and partition information.

Upgrading to a New Release

For information on upgrading to a new software release, refer to the Cisco IOS Software Release Upgrade Paths and Packaging Simplification product bulletin located on CCO. On CCO, follow this path: Products & Ordering: More Information: Product Bulletins. Scroll to Software. Under Cisco IOS 12.0, click the Upgrade Paths bulletin.

Feature Set Table

To determine what features are available with each feature set, see Table 4 and Table 5. The tables summarize what features you can use when running a specific feature set on a Cisco 2600 series router for Cisco IOS Release 12.0(2)XD. Both tables use the following conventions to identify features:

• Yes---The feature is supported in the feature set.

• No---The feature is not supported in the feature set.

Table 4: Feature List by Feature Set for the Cisco 2600 Series --- Part 1 of 2

	Feature Sets
Features	IP Plus	IP Plus 40	IP Plus 56	IP Plus IPSec 56	IP/FW Plus IPSec 56	IP/IPX/ AT/DEC PLUS	IP/IPX/ AT/DEC/ FW Plus
IBM Support
Bridging Code Rework	Yes	Yes	Yes	Yes	No	Yes	No
RIF Passthru in DLSw+	Yes	Yes	Yes	Yes	No	Yes	No
IP Routing
Data Compression Advanced Interface Module (AIM)	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP Precedence for GRE Tunnels (GRE VPN)	Yes	Yes	Yes	Yes	No	Yes	No
Protocol- Independent Multicast (PIM) Version 2	Yes	Yes	Yes	Yes	No	Yes	No
Management
SNMP Inform Request	No	No	No	No	No	No	No
VPDN MIB and Syslog Facility	Yes	Yes	Yes	Yes	No	Yes	No
Quality of Service
CLI String Search	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Scalability
Airline Product Set (ALPS)	Yes	Yes	Yes	Yes	No	Yes	No
Cisco IOS File System	Yes	Yes	Yes	Yes	No	Yes	No
Entity MIB	Yes	Yes	Yes	Yes	No	Yes	No
Expression MIB	Yes	Yes	Yes	Yes	No	Yes	No
OSPF Point to Multipoint	Yes	Yes	Yes	Yes	No	Yes	No
Per Port Debugging (Conditionally Triggered Debugging)	Yes	Yes	Yes	Yes	No	Yes	No
SNMP Manager	Yes	Yes	Yes	Yes	No	Yes	No
Security
Additional Vendor-Proprietary RADIUS Attributes	Yes	Yes	Yes	Yes	No	Yes	No
Authenticating ACLs	Yes	Yes	Yes	Yes	No	Yes	No
Automated Double Authentication	Yes	Yes	Yes	Yes	No	Yes	No
Certificate Authority Interoperability	No	No	No	Yes	No	No	No
Internet Key Exchange Security Protocol	Yes	No	No	No	No	No	No
IOS Firewall Feature Set	No	No	No	No	Yes	No	Yes
IPSec Network Security	No	No	No	Yes	No	No	No
MS-CHAP Support	No	No	No	No	No	No	No
Named Method Lists for AAA Authentication & Accounting	Yes	Yes	Yes	Yes	No	Yes	No
Subblock Phase 1	Yes	Yes	Yes	Yes	No	Yes	Yes
Switching
Enhanced ATM VC Configuration and Management	No	No	No	No	No	Yes	No
Multiple ISDN Switch Types	Yes	Yes	Yes	Yes	No	Yes	No
Voice/Multimedia
Voice over IP	Yes	Yes	Yes	Yes	Yes	Yes	Yes
WAN Optimization
ATM PVC Management	Yes	Yes	Yes	Yes	No	Yes	No
DRP Server Agent	Yes	Yes	Yes	Yes	No	Yes	No
WAN Services
Always On/ Dynamic ISDN (AO/DI)	Yes	Yes	Yes	Yes	No	Yes	No
Dialer Watch	Yes	Yes	Yes	Yes	No	Yes	No
Interface Name Modularity	Yes	Yes	Yes	Yes	No	Yes	No
Microsoft Point-to-Point Compression (MPPC)	Yes	Yes	Yes	Yes	No	Yes	No
Mobile IP	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MS Callback	Yes	Yes	Yes	Yes	No	Yes	No
National ISDN Switch Types	Yes	Yes	Yes	Yes	No	Yes	No
New and Changed Show Commands for the Cisco 2600 Series Routers	Yes	No	No	No	No	Yes	No
Stackable Home Gateway	Yes	Yes	Yes	Yes	No	Yes	No
Time-based Access List	Yes	Yes	Yes	Yes	Yes	Yes	Yes

New and Changed Information

The following sections list the new features supported by the Cisco 2600 for Cisco IOS Release  12.0(2)XD and Cisco IOS Release 12.0(1)T.

New Features in Release 12.0(2)XD

The following new features are supported by the Cisco 2600 in Cisco IOS Release 12.0(2)XD.

ISDN BRI VIC

The ISDN BRI VIC (Voice Interface Card) provides narrowband digital voice connectivity in Cisco's VoIP (and soon, VoFR) environments. It provides a client-side (TE) ISDN S/T physical interface for connection to an NT1 terminating an ISDN telephone network. Each of its two ports can carry two voice calls (one over each ISDN B channel) for a total of four calls per ISDN BRI card.

It is another VIC which supplements the current array of VICs, but is the first digital VIC available.

New Features in Release 12.0(1)T

The following new features are supported by the Cisco 2600 in Cisco IOS Release 12.0(1)T.

CLI String Search

The Command Line Interface (CLI) String Search  feature allows you to search or filter any show or more command's output. This is useful when you need to sort though large amounts of output, or if you want to exclude output that you do not need to see. CLI String Search also allows for searching and filtering at --More-- paging prompts.

With the search function, you can begin unfiltered output at the first line that contains a regular expression you specify. You can specify a maximum of one filter per command to either include or exclude output lines that contain the specified regular expression.

A regular expression is any word, phrase, number, etc. that appears in show or more command output.

Cisco IOS Firewall Feature Set Platform Support

The Cisco IOS Firewall  feature set extends the security technology currently available in Cisco IOS software to provide firewall specific capabilities:

• Context-based Access Control (CBAC)

• Java blocking

• Denial-of-service detection and prevention

• Real-time alerts and audit trails

The Cisco IOS Firewall feature set adds advanced filtering capabilities to existing security functionality in Cisco routers. Some existing Cisco IOS security features include packet filtering via access control lists (ACLs), Network Address Translation (NAT), network-layer encryption, and TACACS+ authentication.

Data Compression Advanced Interface Module

The Data Compression Advanced Interface Module (AIM)  provides hardware-based compression and decompression of packet data transmitted and received on the serial network interfaces of Cisco 2600 Series Routers without occupying the Port Module Slot, that might otherwise be used for additional customer network ports. Supported are the industry standard LZS and MPPC compression algorithms. The Data Compression AIM requires Cisco IOS Release 12.0(1) T, or later 12.0 T releases.

Mobile IP

Mobile IP  provides users the freedom to roam beyond their home subnet while consistently maintaining their home IP address. This enables transparent routing of IP datagrams to mobile users during their movement, so that data sessions can be initiated to them while they roam; it also enables sessions to be maintained in spite of physical movement between points of attachment to the Internet or other networks. Cisco's implementation of Mobile IP is fully compliant with the Internet Engineering Task Force's (IETF's) proposed standard defined in Request for Comments (RFC)    2002.

Time-Based Access Lists

Time-based Access Lists  allow you to implement access lists based on the time of day. To do so, you create a time range that defines specific times of the day and week. The time range is identified by a name, and then referenced by a function, so that those time restrictions are imposed on the function itself.

Currently, IP and IPX extended access lists are the only functions that can use time ranges. The time range allows the network administrator to define when the permit or deny statements in the access list are in effect. Prior to this feature, access list statements were always in effect once they were applied. Both named or numbered access lists can reference a time range.

Important Notes

This section contains important information about use of your Cisco IOS Release 12.0(2)XD software.

Deprecated MIBs

Older Cisco Management Information Bases (MIBs) will be replaced in a future release. OLD-CISCO-* MIBS are currently being 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.

Table 6: Deprecated MIBs

Deprecated MIB	Replacement
OLD-CISCO-APPLETALK-MIB	RFC1243-MIB
OLD-CISCO-CHASSIS-MIB	ENTITY-MIB
OLD-CISCO-CPUK-MIB	In Development
OLD-CISCO-DECNET-MIB
OLD-CISCO-ENV-MIB	CISCO-ENVMON-MIB
OLD-CISCO-FLASH-MIB	CISCO-FLASH-MIB
OLD-CISCO-INTERFACES-MIB	IF-MIB CISCO-QUEUE-MIB
OLD-CISCO-IP-MIB
OLD-CISCO-MEMORY-MIB	CISCO-MEMORY-POOL-MIB
OLD-CISCO-NOVELL-MIB	NOVELL-IPX-MIB
OLD-CISCO-SYS-MIB	(Compilation of other OLD* MIBS)
OLD-CISCO-SYSTEM-MIB	CISCO-CONFIG-COPY-MIB
OLD-CISCO-TCP-MIB	CISCO-TCP-MIB
OLD-CISCO-TS-MIB
OLD-CISCO-VINES-MIB	CISCO-VINES-MIB
OLD-CISCO-XNS-MIB

Caveats

This section contains the open caveats for the current Cisco IOS maintenance release only. The software caveats are also located in the Caveats for Cisco IOS Release 12.0 T document that accompanies these release notes.The caveats document is located on CCO and the Documentation CD-ROM.

Open Caveats - Release 12.0(2)XD

This section describes possibly unexpected behavior by Release 12.0(2)XD. Unless otherwise noted, these caveats apply to all 12.0 releases up to and including 12.0(2)XD.

Basic System Services

• CSCdk51491

Configuring the layer3 switching with access filter in and out on the hssi interface with the Frame relay ietf encap, then try to configure the smds encap will cause the router to crash.

• CSCdk66827

When configuring a mc3810 for CCS cross-connect, it's possible that calls will stop getting connected after a period of time.

DECnet

• CSCdk65997

This problem is specific to the RSM platform and for DECnet over VLANs.

The code for DECnet support over VLANs uses a cache to store VLAN-header information, and this cache is used in the fast-switch path.

When there is a routing topology change, the fast-switching code continues to look at the stale cache entry, and as a result, packets destined via the new route end up getting black-holed.

The work-around is to disable DECnet fast-switching on the relevant interface.

IBM Connectivity

• CSCdk77166

Router running DLSw with FST/Direct/LLC2(Lite) encapsulations could crash.

Workaround for this is to use DLSw with TCP encapsulation.

Interfaces and Bridging

• CSCdj43445

FDDI PA will now have a software address filter at VIP level to filter out unwanted multicast packets. This helps performance and also unnecessary entries in netflow tables.

• CSCdk66019

If "no keepalive" (or 0 keepalive) is configured on fastethernet, the line will stay up even though the MII is removed or the cable is disconnected. If the interface is then reconfigured with "keepalive" (of non-zero value) while the physical media stayed down, the link would still indicate up. The only workaround is by doing a shut/no shut, or clear interface command.

• CSCdk74431

A large packet sent over a MLP bundle of over 2 links with VPDN on a ATM PPP tunnel on a ATM-Lite interface will be corrupted sometimes. A workaround is to disable the fastswitching on the ATM-lite interface.

IP Routing Protocols

• CSCdj88650

If ospf has both an external and a summary route to the same network and a partial spf run deletes the summary route, the external route will not be installed.

The external LSA may have the routing bit set, even if it is not installed in the routing table. This is caused by a failure to reset the external's routing bit when the summary route replaces the external route in the ip routing table. The following sequence of events illustrates the problem, given external and summary routes to network 1.0.0.0:

1. ospf installs external route to 1.0.0.0. The external LSA for 1.0.0.0 has its routing bit set 2. ospf installs summary route to 1.0.0.0, replacing the external route. The routing bit is not reset on the external LSA for 1.0.0.0. 3. ospf performs a partial spf to remove the summary route to 1.0.0.0. The external route to 1.0.0.0 is not installed. To add to the confusion, the routing bit is still set on the external LSA for 1.0.0.0.

Eclair ip route *' will force the installation of the external route. Alternatively, a'clear ip ospf redist' at the router that originates the external route will trigger installation of the external route.

• CSCdk30085

Guaranteed service flowspec in RSVP RESV messages must contain certain fields within a certain range (as indicated by RFC 2212). This fix puts these checks in the code

• CSCdk66969

With sync and certain topologies, some bgp routes may not get advertised after peer reset.

The workaround is to configure "no sync", or "clear ip bgp x.x.x.x".

ISO CLNS

• CSCdk36270

On all platforms which do not use the old mci controller, fast-switching of clns traffic with non-zero N-Selector does not work.

Miscellaneous

• CSCdi72371

When running 2523 and 2524 serial ports in asynchronous mode, modem control is only supported when using DTE style 5-in-1 cables (in order to connect to DCE devices). The DCE 5-in-1 cable (in order to connect to DTE devices) will not support modem control for the asynchronous mode. In order to support DTE devices with modem control, it is required to use the DTE style cables with a null modem adapter.

• CSCdk29115

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 using 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.

• CSCdk42816

When running Tag Switching and CEF on an Ethernet interface, it is possible for the interface to get into a state where the IP packets are not forwarded properly.

The problem occurs when a CEF entry is improperly pointing at a Tag data structure. To check whether this is the problem, do

show adjacency detail

for the next hop on the failing route. In the failure case, the packet counts on the "IP" adjacency will not be increasing, but those on the "TAG" one will.

Workaround: disable Tag switching on the interface

• CSCdk46820

When enrolling certificate with Entrust VPN, you might fail to get CA certificates. So far, this problem only happened on the Cisco 2500 platform and there is no work around. Please upgrade to the next build.

• CSCdk46853

In Release 11.2P and 11.3 when Fast Ethernet subinterfaces are configured for encryption, if the crypto map is only applied to the main interface and the IP address is configured in the subinterface, the packets could be switched in the clear. In Release 12.0, enabling CEF could cause the packets to get dropped.

• CSCdk59049

When you run TRISL to a Cisco 7000 family router, some frames larger than 1535 bytes might not be forwarded. This condition occurs when you run TRISL between two VLANs that are on switches.

Workaround: Do not use TRISL. Use an external device to router or bridge between the two different VLANs. Or modify the end devices so that they do not send packets larger than 1500 bytes.

• CSCdk59879

From enclosure: Release-note

A Cisco 1600 router or Cisco 3600 series router will reload when IPSEC is configured over the ISDN link. This condition is caused by the IP route-cache that is enabled by default on all interfaces.

The workaround is to turn off fast switching with the no ip route-cache command on the ISDN interfaces.

From enclosure: Release-note-2

This crash has also been seen on the 3600 platform.

• CSCdk77426

If a UDP packet with an invalid length is sent to port 514 (the "syslog" port) on an IOS device, the device is likely to crash, possibly without saving a stack trace. Such packets are sent by the popular "nmap" port scanning program.

Wide-Area Networking

• CSCdk70026

StatusMsg with endpointRef is not processed in multipoint state table. This could result in releasing multipoint vc.

Resolved Caveats - Release 12.0 T

All the caveats listed in this section are resolved in release 12.0(2)T.

IP Routing Protocols

• CSCdk37843

workaround:

The workaround is to configure "router rip" on the router first, before configuring the address on the interface.

Miscellaneous

• CSCdk38476

RADIUS accounting does not work if you have separate authentication and accounting servers.

• CSCdk41902

An IP client might not be able to ping the Route Switch Module (RSM). This situation might occur during Token-Ring Virtual LAN (TR VLAN) configuration on the RSM. It is most common when the IP client sends an address resolution protocol (ARP) without a routing information field (RIF), then sends an ARP with a RIF. The situation might also occur if the concentrator relay function (CRF), to which the client is connected, is configured for source-route bridging (SRB). Workaround: Change the CRF mode from SRB to source-route transparent (SRT) bridging.

Novell IPX, XNS, and Apollo Domain

• CSCdk52372

The Internetwork Packet Exchange (IPX) input process might run out of stack, causing a system reload or reduced performance. There is no workaround.

Related Documentation

The following sections describe the documentation available for the Cisco 2600. Typically, these documents consist of hardware installation guides, software installation guides, Cisco IOS configuration and command references, system error messages, and feature modules, which are updates to Cisco IOS documentation. Documentation is available as printed manuals or electronic documents, except for feature modules, which are available online only.

The most up-to-date documentation can be found on the Web via Cisco  Connection Online (CCO)  and the Documentation CD-ROM.  These electronic documents might contain updates and modifications made after the hard copy documents were printed.

These release notes should be used in conjunction with the documents listed in the following sections:

• Release-Specific Documents

• Feature Modules

• Platform-Specific Documents

• Cisco IOS Software Document Set

Release-Specific Documents

The following documents are specific to Release 12.0 T, on which Release 12.0(2)XD is based. They are located on CCO and the Documentation CD-ROM:

• Release Notes for Cisco IOS Release 12.0 T

To reach the cross-platform Release Notes for Cisco IOS Release 12.0 T on CCO, follow this path:

Software & Support: Cisco Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes for Cisco IOS Release  12.0  T

To reach the cross-platform Release Notes for Cisco IOS Release 12.0 on the Documentation CD-ROM, follow this path:

Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes for Cisco IOS Release 12.0 T

• Product bulletins, field notices, and other release-specific documents

To reach these documents, refer to the Software Center at this path on CCO:

Software & Support: Software Center: Cisco IOS Software

• Caveat documents

As a supplement to the caveats listed in the "Caveats" section in these release notes, see the Caveats for Cisco IOS Release 12.0 T document, which contains caveats applicable to all platforms for all maintenance releases of Release 12.0 T.

To reach the caveat document on CCO, follow this path:

Products & Ordering: Cisco Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Caveats: Caveats for Cisco IOS Release 12.0 T

To reach the caveat document on the Documentation CD-ROM, follow this path:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS 12.0: Caveats: Caveats for Cisco IOS Release 12.0 T

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Note If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. Bug Navigator II can be found at http://www.cisco.com/support/bugtools, or from CCO, select Software & Support: Tools: Bug  Toolkit II.

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Feature Modules

Feature modules describe new features supported by Release 12.0 T and are an update to the Cisco  IOS documentation set. They consist of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the features modules are available online only. The feature module information is included in the next printing of the Cisco IOS documentation set.

To reach the feature modules on CCO, follow this path:

Products & Ordering: Cisco Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation: New Features in Release 12.0 T

To reach the feature modules on the Documentation CD-ROM, follow this path:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation: New Features in Release 12.0 T

Platform-Specific Documents

The documents listed in Table 7 are available for the Cisco 2600 series. These documents are also available online at Cisco  Connection Online (CCO)  and on the Documentation CD-ROM.

To reach Cisco 2600 documentation on CCO, follow this path:

Products & Ordering: Cisco Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers

To reach Cisco 2600 documentation on the Documentation CD-ROM, follow this path:

Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers

Table 7: Platform Documents for the Cisco 2600 Series

Book	Chapter Topics
Cisco 2600 Series Cabling and Setup	Take Out What You Need Installing a Network Module Installing a WAN Interface Card Connect the LAN Cable(s) Connect the Ethernet Cable(s) Connect the Console Cable Connect Power and Turn On the Router Run Setup
Cisco 2600 Series Hardware Installation Guide	About This Guide Overview of the Router Preparing to Install the Router Installing the Router Maintaining the Router Troubleshooting the Router
Network Module Hardware Installation Guide	About This Guide Overview of Cisco Network Modules Preparing to Install Network Modules Installing a Network Module Connecting Ethernet Network Modules Connecting Serial Network Modules Connecting ISDN BRI Network Modules Connecting ISDN PRI Network Modules Connecting Voice Network Modules Connecting Digital Modem Network Modules Connecting an ATM Network Module Connecting HSSI Network Modules Connecting a Compression Network Module FCC Class B Compliance
Update to Network Modules Hardware Installation Guide	Software and Hardware Requirements Safety Recommendations Required Tools and Equipment Installing a Network Module in a Chassis Slot Connecting and Configuring a 1-Port ATM-25 Network Module Connecting and Configuring a 1-Port HSSI Network Module Connecting and Configuring Analog Modem Network Modules
WAN Interface Cards Hardware Installation Guide	About This Guide Overview of Cisco WAN Interface Cards Installing a WAN Interface Card in Cisco Modular Routers Connecting Cisco WAN Interface Cards to a Network Configuring WAN Interface Cards
Update to WAN Interface Cards Hardware Installation Guide	Chapter 1 Update
Cisco 2600 Series Configuration Notes	Cisco 2600 Series Memory Upgrade Configuration Note Cisco 2600 Series NEBS Level 3 Kit Regulatory Compliance and Safety Information Cisco 2600 Series Power Supply Configuration Note Cisco 2600 Series Rack Mount Upgrade Configuration Note Installing the Cisco RPS Adapter Plate in Cisco 2600 Series
Cisco 2600 Series Cable Specifications	Console and Auxiliary Port Signals and Pinouts Ethernet 10BaseT Port Signals and Pinouts ISDN BRI Signals and Pinouts 56/64-Kbps DSU/CSU Signals and Pinouts Serial Connection Signals and Pinouts Smart Serial Connection Signals and Pinouts

Cisco IOS Software Document Set

The Cisco IOS software documentation set consists of the Cisco  IOS configuration guides, Cisco  IOS command references, and several other supporting documents. These documents are shipped with your order in electronic form on the Documentation CD-ROM, unless you specifically ordered the printed versions.

Documentation Modules and Indexes

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, and Cisco IOS software functionality and contain 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 and the Documentation CD-ROM, two master hot-linked indexes provide indexing information for the Cisco IOS software documentation set: an index for the configuration guides and an index for the command references. In addition, individual books contain a book-specific index.

To reach these indexes on CCO, follow this path:

Products & Ordering: Cisco Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Cisco IOS Release 12.0 Configuration Guides and Command References: Configuration Guide Master Index or Command Reference Master Index

To reach these indexes on the Documentation CD-ROM, follow this path:

Cisco IOS Software Configuration: Cisco IOS Release 12.0: Cisco IOS Release 12.0 Configuration Guides and Command References: Configuration Guide Master Index or Command Reference Master Index

To reach documentation related to an index entry, click on the page number following the entry.

Release 12.0 Documentation Set

Table 8 details 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.

To reach the Cisco IOS documentation set on CCO, follow this path:

Products & Ordering: Cisco Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0

To reach the Cisco IOS documentation set on the Documentation CD-ROM, follow this path:

Cisco IOS Software Configuration: Cisco IOS Release 12.0

Table 8: Cisco IOS Software Documentation Set for Release 12.0

Books	Chapter Topics
Configuration Fundamentals Configuration Guide Configuration Fundamentals Command Reference	Configuration Fundamentals Overview Cisco IOS User Interfaces File Management System Management
Bridging and IBM Networking Configuration Guide Bridging and IBM Networking Command Reference	Transparent Bridging Source-Route Bridging Token Ring Inter-Switch Link Remote Source-Route Bridging DLSw+ STUN and BSTUN LLC2 and SDLC IBM Network Media Translation DSPU and SNA Service Point SNA Frame Relay Access Support APPN NCIA Client/Server Topologies Cisco Mainframe Channel Connection Airline Product Set
Dial Solutions Configuration Guide Dial Solutions Command Reference	Dial-In Port Setup Dial-In Terminal Services Dial-on-Demand Routing (DDR) Dial Backup Dial-Out Modem Pooling Large-Scale Dial Solutions Cost-Control Solutions ISDN X.25 over ISDN VPDN Dial Business Solutions and Examples
Cisco IOS Interface Configuration Guide Cisco IOS Interface Command Reference	Interface Configuration Overview
Network Protocols Configuration Guide, Part 1 Network Protocols Command Reference, Part 1	IP Addressing IP Services IP Routing Protocols
Network Protocols Configuration Guide, Part 2 Network Protocols Command Reference, Part 2	AppleTalk Novell IPX
Network Protocols Configuration Guide, Part 3 Network Protocols Command Reference, Part 3	Apollo Domain Banyan VINES DECnet ISO CLNS XNS
Security Configuration Guide Security Command Reference	AAA Security Services Security Server Protocols Traffic Filtering and Firewalls IP Security and Encryption Passwords and Privileges Neighbor Router Authentication IP Security Options
Cisco IOS Switching Services Configuration Guide Cisco IOS Switching Services Command Reference	Switching Paths for IP Networks Virtual LAN (VLAN) Switching and Routing
Wide-Area Networking Configuration Guide Wide-Area Networking Command Reference	ATM Frame Relay SMDS X.25 and LAPB
Voice, Video, and Home Applications Configuration Guide Voice, Video, and Home Applications Command Reference	Voice over IP Voice over Frame Relay Voice over ATM Voice over HDLC Video Support Universal Broadband Features
Quality of Service Solutions Configuration Guide1 Quality of Service Solutions Command Reference1	Classification Scheduling Packet Drop Traffic Shaping ATM QoS SNA QoS Line Protocols
Cisco IOS Software Command Summary Dial Solutions Quick Configuration Guide System Error Messages Debug Command Reference

1This book will not be available until January 1999.

Service and Support

For service and support for a product purchased from a reseller, contact the reseller. Resellers offer a wide variety of Cisco  service and support programs, which are described in the section "Service and Support" in the information packet that shipped with your product.

For service and support for a product purchased directly from Cisco, use CCO.

Software Configuration Tips on the Cisco TAC Home Page

For helpful tips on configuring Cisco products, follow this path on CCO:

Software & Support: Technical Tips (button on left margin)

"Hot Tips" are popular tips and hints gathered from Cisco's Technical Assistance Center (TAC). Most of these documents are also available from the TAC's Fax-on-Demand service. To reach Fax-on-Demand and receive documents at your fax machine, call 888-50-CISCO (888-502-4726). From international areas, call 650-596-4408.

The following sections are provided from the Technical Tips page:

• Field Notices---Designed to provide notification of critical issues regarding Cisco products. These include problem descriptions, safety or security issues, and hardware defects.

• Hardware---Technical Tips related to specific hardware platforms.

• Internetworking Features---Tips on using and deploying Cisco IOS software features and services.

• Sample Configurations---Actual configuration examples complete with topology and annotations.

• Software Products---MultiNet & Cisco Suite 100, Network Management, Cisco IOS Software Bulletins, CiscoPro Configurations.

• Special Collections---Other Helpful Documents: Frequently Asked Questions, Security Advisories, References & RFCs, Case Studies, CiscoPro Documentation CD-ROM.

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 reach CCO in the following ways:

• WWW:    http://www.cisco.com

• WWW:    http://www-europe.cisco.com

• WWW:    http://www-china.cisco.com

• Telnet:    cco.cisco.com

• Modem:    From North America, 408  526-8070; from Europe, 33  1  64  46  40  82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8  kbps.

For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.

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 reach 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.

Posted: Tue Feb 16 10:49:02 PST 1999
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