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

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

December 7, 1998

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

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:

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

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:

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.

Updating to a New Release

For information on updating 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 and 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:


Note These feature set tables contain only selected lists of features. These tables are not cumulative or complete lists of all the features in each image.


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


Table 5: Feature List by Feature Set for the Cisco 2600 Series --- Part 2 of 2
Feature Sets
Features Enter-
prise
Plus
Enter-
Prise
Plus
40
Enter-
prise
Plus
56
Enter-
prise
Plus
IPSec
56
Enter-
prise/
APPN
Plus
Enter-
prise/
APPN
Plus
40
Enter-
prise/
APPN
Plus
56
Enter-
prise/
APPN
Plus
IPSec
56
Enter-
prise/
FW
Plus
56
IBM Support
Bridging Code Rework

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

RIF Passthru in DLSw+

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

IP Routing
Data Compression Advanced Interface Module (AIM

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IP Type of Service Precedence for GRE Tunnels
(GRE VPN)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Protocol-
Independent Multicast (PIM) Version 2

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Management
SNMP Inform Request

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

VPDN MIB and Syslog Facility

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Quality of Service
CLI String Search

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Scalability
Airline Product Set (ALPS)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Cisco IOS File System

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Entity MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Expression MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

OSPF Point to Multipoint

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Per Port Debugging (Cond Triggered Debugging)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

SNMP Manager

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Security
Additional
Vendor-Proprietary RADIUS Attributes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Authenticating ACLs

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Certificate Authority Interoperability

No

No

No

Yes

No

No

No

Yes

No

Internet Key Exchange Security Protocol

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

IPSec Network Security

No

No

No

Yes

No

No

No

Yes

No

IOS Firewall Feature Set

No

No

No

No

No

No

No

No

Yes

MS-CHAP Support

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Named Method Lists for AAA Authentication & Accounting

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Subblock Phase 1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Switching
Multiple ISDN Switch Types

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

National ISDN Switch Types

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Voice/Multimedia
Voice over IP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

WAN Optimization
ATM PVC Management

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

DRP Server Agent

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

WAN Services
Always On/
Dynamic ISDN (AO/DI)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Dialer Watch

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Interface Name Modularity

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Microsoft Point-to-Point Compression (MPPC)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Mobile IP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

MS Callback

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

New and Changed Show Commands for the Cisco 2600 Series Routers

No

No

No

No

Yes

Yes

Yes

Yes

No

Stackable Home Gateway

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Time-based Access List

Yes

Yes

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:

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.


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 is at http://www.cisco.com/support/bugtools, or from CCO, select Software & Support: Technical Tools: Bug Toolkit II

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

The [no] atm rmon collect group-num does not properly take effect when invoked. The ATM-RMON feature (available only on the LS-1010 platform) is fully functional, except the assignment of ATM interfaces to ATM-RMON collection groups must be done by setting the associated MIB objects with SNMP. See the portSelTable definitions in the ATM-RMON-MIB.my MIB document for more information.
There might be an issue with a second call being placed to a station that is currently in call_setup or connected. This only appears where the call is being forwarded via an intermediate router.

IP Routing Protocols

When using sparse-mode PIM multicast, it might take up to five minutes from boot up of the routers until the multicast tree stabilizes. During this period, PATH messages sent to multicast addresses will not be delivered, and hence RSVP path and reservation sessions will not be established. This is a transient phenomenon which occurs only when the routers are being booted. Once the multicast tree stabilizes, paths/reservations are established quickly.
This problem does not occur in unicast or dense-mode multicast networks.

Miscellaneous

The Token-Ring Inter-Switch Link (TR-ISL) feature is currently not supported on either the Cisco 3620 or Cisco 3640. There is no workaround.
If flow-acceleration is enabled and subsequently disabled and if encryption is also subsequently enabled, the router might unexpectedly reload.
Under rare circumstances, if an incoming call is terminated by the caller, the IP portion of the call might not be terminated correctly. This only occurs under very specific timing conditions.
ALPS UTS serial encapsulation could not be configured.
Cisco 800 routers can experience a page leak after prolonged usage. This condition is rare (roughly 1 in 50 units experience it) and might take several days to manifest, depending on the number of calls.
When this problem occurs, performance degrades until the unit thrashes (for example, runs so slow that no useful work is accomplished). This is accompanied by continuous and heavy blinking of the OK LED.
Disabling multilink and STAC compression might reduce or eliminate the leak. A soft or hard reset (for example, using the reload or power-cycle command) is the only way to clear the problem when it occurs.
To cause a leak, the router must allocate a large block of memory, read from that memory, deallocate the block, allocate another large block, and write to it without reading from it. The alloc/read/free case (without any intervening writes) is very rare and typically only occurs during call setup failure with multilink (MLPPP) and/or compression configured.

Novell IPX, XNS, and Apollo Domain

IPX allows the primary interface and multiple ISL subinterfaces to have the same IPX network number and encapsulation.
Workaround: Don't configure interfaces with the same IPX network number.

Wide-Area Networking

ARP replies out a bridged PPP over ATM with IRB interface will fail to be sent. To intall the ARP entries, initiate traffic from the router and force an incoming ARP reply.
Removing a dialer interface while a call is up can result in the loss of use of one B channel. A reload of the router will bring it back.

Resolved Caveats - Release 12.0 T

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

IP Routing Protocols

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

Miscellaneous

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

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

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:

To access the cross-platform Release Notes for Cisco IOS Release 12.0 T on CCO, follow this path:
Software and 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 access 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
To access these documents, refer to the Software Center at this path on CCO:
Software & Support: Software Center: Cisco IOS Software
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 access the caveat document on CCO, follow this path:
Products and Ordering: Cisco Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Caveats: Caveats for Cisco IOS Release 12.0 T
To access 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

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 access Cisco 2600 documentation on CCO, follow this path:

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

To access 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

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 access the feature modules on CCO, follow this path:

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

To access 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

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 access these indexes on CCO, follow this path:

Products and 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 access 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 access 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.


Note The most current Cisco IOS documentation can be found on the latest Documentation CD-ROM and on the Web. These electronic documents might contain updates and modifications made after the paper documents were printed.

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

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

To access 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.


Note If you purchased your product from a reseller, you can access CCO as a guest. CCO is Cisco  Systems' primary real-time support channel. Your reseller offers programs that include direct access to CCO services.

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 access 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:

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:

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


Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800  553-2447, 408  526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800  553-6387, 408  526-7208, or cs-rep@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 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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