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Release Notes for Cisco 2600 Series for
Cisco IOS Release 12.0 T

Release Notes for Cisco 2600 Series for
Cisco IOS Release 12.0 T

December 14, 1998

These release notes describe new features for the Cisco 2600 series routers that support Cisco  IOS Release  12.0, up to and including Release 12.0(2)T. Cisco IOS Release 12.0(2)T is based on Cisco  IOS Release  12.0. These release notes are updated with each maintenance release of the Cisco  IOS software, which is typically every 6 weeks.

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

For a list of software caveats that apply to Release 12.0(2)T, refer to the "Caveats" section of this document. Also, you may refer to the Caveats for Cisco IOS Release 12.0 T   document accompanying these release notes, also located on CCO  and the Documentation CD-ROM.

Contents

These release notes discuss the following topics:

Introduction

This section provides information about the Cisco 2600 series routers and Early Deployment Releases (ED) for the Cisco 2600 series routers.

Cisco 2600 Series Routers

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 cost-effective, modular access routers designed to enable customers to easily adopt future technologies and scale to accommodate network expansion, thereby protecting the customer's investment. The Cisco 2600 series shares modular interfaces with the Cisco 1600, Cisco 1700, and Cisco 3600 series, providing a cost-effective solution to meet today's branch office needs for applications such as:

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.

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 fixes to software caveats and support for new Cisco hardware. Use the information in this section to determine which early deployment release you require.

The following table briefly describes some of the ED releases now and soon to be available for the Cisco 2600 series.


Table 1: Early Deployment Releases for the Cisco 2600 Series
ED Release Maintenance Release Additional Software Features Additional Hardware Features Additional Feature Sets Availability

Release 12.0 T

2

-3DES Network Security

--

  • IP Plus IPSec 3DES

  • IP/FW Plus IPSec 3DES

  • Enterprise Plus IPSec 3DES

  • Enterprise F/W Plus IPSec 3DES

  • Enterprise/APPN Plus IPSec 3DES

Now

Release 12.0 XC

2

--

  • Cisco 2620 and Cisco  2621 with Fast Ethernet

  • 1- or 2-port 10/100 Ethernet for the Cisco  2620 and Cisco  2621

  • IP Plus IPSec 3DES

  • IP/FW Plus IPSec 3DES

  • Enterprise Plus IPSec 3DES

  • Enterprise F/W Plus IPSec 3DES

  • Enterprise/APPN Plus IPSec 3DES

  • IP/FW

  • IP/FW Plus IPSec 56

  • IP/IPX/AT/DEC/FW Plus

  • Enterprise F/W IPSec 56

Soon

Release 12.0 XD

2

--

  • ISDN BRI Voice over IP Voice Interface Card

  • IP/FW Plus IPSec 56

  • IP/IPX/AT/DEC/FW Plus

  • Enterprise F/W IPSec 56

Now

Release 11.3 T

7

--

--

--

Now

System Requirements

This section describes the system requirements for Release 12.0 T and includes the following subsections:

Memory Requirements

Table 2 describes the memory requirements of the Cisco IOS feature sets for the Cisco 2600 series for Release 12.0 T. 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

c2600-i-mz

4 MB

20 MB

RAM

IP Plus

c2600-is-mz

8 MB

24 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 3DES

c2600-ik2s-mz

8 MB

24 MB

RAM

IP Plus IPsec 56

c2600-is56i-mz

8 MB

24 MB

RAM

IP/FW

c2600-io-mz

4 MB

20 MB

RAM

IP/FW Plus IPSec 3DES

c2600-ik2os-mz

8 MB

24 MB

RAM

IP/FW Plus IPSec 56

c2600-ios56i-mz

8 MB

24 MB

RAM

IP/IPX/AT/DEC

c2600-d-mz

8 MB

20 MB

RAM

IP/IPX/AT/DEC Plus

c2600-ds-mz

8 MB

24 MB

RAM

IP/IPX/AT/DEC/FW Plus

c2600-dos-mz

8 MB

24 MB

RAM

Enterprise Plus

c2600-js-mz

8 MB

32 MB

RAM

Enterprise Plus IPSec 3DES

c2600-jk2s-mz

8 MB

32 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 IPSec 3DES

c2600-ajk2s-mz

8 MB

32 MB

RAM

Enterprise/APPN Plus IPsec 56

c2600-ajs56i-mz

8 MB

32 MB

RAM

Enterprise/FW Plus IPSec 3DES

c2600-jk2os-mz

8 MB

32 MB

RAM

Enterprise/FW Plus IPSec 56

c2600-jos56i-mz

8 MB

32 MB

RAM

Remote Access Server

c2600-c-mz

4 MB

16 MB

RAM

Hardware Supported

Cisco IOS Release 12.0 T supports the Cisco 2600 series routers:


Note The Cisco 2620 and Cisco 2621 series routers are only available with Cisco IOS Release  12.0  XC and later. For more information, refer to the "Early Deployment Releases" section.

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 Interfaces2

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

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

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

1- or 2- Voice interface card slots

All Cisco  2600 series platforms

2-port FXS Voice/Fax interface card3

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; Asynchronous/ Synchronous support)

All Cisco  2600 series platforms

2-port Asynchronous/ Synchronous (up to 128 kbps)

All Cisco  2600 series platforms

Advanced Integration Modules

Data Compression AIM (up to 8.192 Mbps)

All Cisco  2600 series platforms

1The Voice/Fax and ATM-25 network modules require Cisco IOS Plus feature sets.
2The 1- or 2-port 10/100 Ethernet LAN interface for the Cisco 2621 and Cisco 2621 series routers is only available in Release 12.0 XC and later. For more information, refer to the "Early Deployment Releases" section.
3This interface card requires the NM-1V or NM-2V network module.


Note The 1- or 2-port 10/100 Ethernet LAN interface for the Cisco 2621 and Cisco 2621 series routers is available in Release 12.0 XC and later. The ISDN BRI Voice over IP Voice Interface Card is available in Release 12.0 XD and later. For more information, refer to the "Early Deployment Releases" section.

Determining Your Software Release

To determine the version of Cisco IOS software currently running on a Cisco 2600 series 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-i-mz), Version 12.0(2)T, 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

At the time of printing, no product bulletins were available for upgrading to Cisco IOS Release  12.0  T. For general 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 11.3, click the Upgrade Paths bulletin.

This bulletin does not contain information specific to Release 12.0 T, but it does provide updating information that might apply to Release 12.0 T.

Other 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 Release 11.3(5)T and later.

To access Cisco 2600 firmware documentation on CCO, follow this path:

Products and Ordering: Cisco Documentation: Access Servers and Access Routers: Access Servers or Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware

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

Access Servers and Access Routers: Access Servers or Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware

Feature Set Tables

Cisco IOS software is packaged in feature sets (also called software images) depending on the platform. Each feature set contains a specific set of Cisco IOS features. The following section lists the feature set matrix and the features supported by each feature set.

The feature set matrix shows the feature set organization and lists which feature sets are available on the Cisco 2600 series for Release 12.0 T. Table 4 lists the Cisco IOS software feature sets available for the Cisco 2600 series in Cisco IOS Release 12.0 T. Table 4 lists the feature set name, the feature set matrix term, the software image name, and the supported platforms.


Table 4: Feature Sets Supported by the Cisco  2600 Series
Feature Sets Feature Set Matrix Term Software Image Platforms
IP Standard
Feature Sets

IP

  • Basic

c2600-i-mz

All Cisco 2600 series platforms

IP Plus

  • Basic

  • Plus

c2600-is-mz

All Cisco 2600 series platforms

IP Plus 40

  • Plus

  • Plus 40

c2600-is40-mz

All Cisco 2600 series platforms

IP Plus 56

  • Plus

  • Plus 56

c2600-is56-mz

All Cisco 2600 series platforms

IP Plus IPSec 3DES

  • Plus

  • Plus IPSec 3DES

c2600-ik2s-mz

All Cisco 2600 series platforms

IP Plus IPsec 56

  • Plus

  • Plus IPsec 56

c2600-is56i-mz

All Cisco 2600 series platforms

IP/FW

  • Basic

  • FW

c2600-io-mz

All Cisco 2600 series platforms

IP/FW Plus IPSec 3DES

  • Basic

  • FW Plus

  • Plus IPSec 3DES

c2600-ik2os-mz

All Cisco 2600 series platforms

IP/FW Plus IPSec 56

  • Basic

  • FW Plus

  • Plus IPSec 56

c2600-ios-mz

All Cisco 2600 series platforms

IP/IPX/AppleTalk/
DEC Standard
Feature Sets

IP/IPX/AppleTalk/
DEC

  • Basic

c2600-d-mz

All Cisco 2600 series platforms

IP/IPX/AppleTalk/
DEC Plus

  • Basic

  • Plus

c2600-ds-mz

All Cisco 2600 series platforms

IP/IPX/AT/DEC/FW Plus

  • Basic

  • FW Plus

c2600-dos-mz

All Cisco 2600 series platforms

Enterprise Standard
Feature Sets

Enterprise Plus

  • Plus

c2600-js-mz

All Cisco 2600 series platforms

Enterprise Plus IPSec 3DES

  • Plus

  • Plus IPSec 3DES

c2600-jk2s-mz

All Cisco 2600 series platforms

Enterprise Plus IPsec 56

  • Plus

  • Plus IPsec 56

c2600-j56i-mz

All Cisco 2600 series platforms

Enterprise/FW Plus IPSec 56

  • FW Plus

  • Plus 56

c2600-jos56i-mz

All Cisco 2600 series platforms

Enterprise/FW Plus IPSec 3DES

  • FW Plus

  • Plus IPSec 3DES

c2600-jk2os-mz

All Cisco 2600 series platforms

Enterprise/APPN Standard
Feature Sets

Enterprise/APPN Plus

  • Plus

c2600-ajs-mz

All Cisco 2600 series platforms

Enterprise/APPN Plus IPSec 3DES

  • Plus

  • Plus IPSec 3DES

c2600-ajk2s-mz

All Cisco 2600 series platforms

Enterprise/APPN Plus IPsec 56

  • Plus

  • Plus IPSec 56

c2600-ajs56i-mz

All Cisco 2600 series platforms

Remote Access Server Feature Set

Remote Access Server

  • Basic

c2600-c-mz

All Cisco 2600 series platforms

Caution Cisco IOS images with strong encryption (including, but not limited to, 56-bit data encryption feature sets) are subject to U.S. government export controls, and have a limited distribution. Images to be installed outside the U.S. require an export license. Customer orders might be denied or subject to delay due to U.S. government regulations. Contact your sales representative or distributor for more information, or send e-mail to export@cisco.com.

Table 5 through Table 6 list the features and feature sets supported by the Cisco IOS Release 12.0 T for the Cisco  2600 series.

The following 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 5: Feature List by Feature Set for the Cisco 2600 Series---Part 1 of 2
Features Feature Sets
In IP IP
Plus
IP
Plus
40
IP
Plus
56
IP
Plus
IPSec
56
IP
Plus
IPSec
3DES
IP/
FW
IP/
FW
Plus
IPSec
56
IP/
FW
Plus
IPSec
3DES
IP/
IPX/
AT/
DEC
IP/
IPX/
AT/
DEC
Plus
IP/
IPX/
AT/
DEC/
FW Plus
IBM Support
Bridging Code Rework

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

RIF Passthru in DLSw+

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IP Routing
Data Compression Advanced Interface Module (AIM)

(1)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IP Precedence for GRE Tunnels (GRE VPN)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Protocol-Independent Multicast (PIM) Version 2

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Management
SNMP Inform Request

No

No

No

No

No

No

No

No

No

No

No

No

VPDN MIB and Syslog Facility

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Quality of Service
CLI String Search

(1)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Scalability
Airline Product Set (ALPS)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Cisco IOS File System

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Entity MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Expression MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OSPF Point to Multipoint

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Per Port Debugging (Conditionally Triggered Debugging)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

SNMP Manager

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Security
Additional
Vendor-Proprietary RADIUS Attributes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Authenticating ACLs

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Automated Double Authentication

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Certificate Authority Interoperability

No

No

No

No

Yes

Yes

Yes

Yes

Yes

No

No

No

Internet Key Exchange Security Protocol

No

No

No

No

Yes

Yes

No

Yes

Yes

No

No

No

IOS Firewall Feature Set

(1)

No

No

No

No

No

No

Yes

Yes

Yes

No

No

Yes

3DES Network Security

(2)

No

No

No

No

Yes

Yes

No

No

Yes

No

No

No

IPSec Network Security

No

No

No

No

Yes

Yes

No

No

Yes

No

No

No

MS-CHAP Support

No

No

No

No

No

No

No

No

No

No

No

No

Named Method Lists for AAA Authentication & Accounting

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Subblock Phase 1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Switching
Enhanced ATM VC Configuration and Management

No

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Yes

Yes

Multiple ISDN Switch Types

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Voice/Multimedia
Voice over IP

No

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Yes

Yes

WAN Optimization
ATM PVC Management

No

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Yes

Yes

DRP Server Agent

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

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

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Dialer Watch

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Interface Name Modularity

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Microsoft Point-to-Point Compression (MPPC)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Mobile IP

(1)

No

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Yes

Yes

MS Callback

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

National ISDN Switch Types

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

New and Changed Show Commands for the Cisco 2600 Series Routers

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Stackable Home Gateway

No

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Yes

Yes

Time-based Access List

(1)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes


Table 6: Feature List by Feature Set for the Cisco 2600 Series---Part 2 of 2
Features Feature Sets
In Enter-
prise
Plus
Enter-
prise
Plus
IPSec
56
Enter-
prise
Plus
IPSec
3DES
Enter-prise/
FW
Plus
IPSec
56
Enter-
prise/
FW
Plus
IPSec
3DES
Enter-
prise/
APPN
Plus
Enter-
prise/
APPN
Plus
IPSec
3DES
Enter-
prise/
APPN
Plus
IPSec
56
Remote Access Server
IBM Support
Bridging Code Rework

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

RIF Passthru in DLSw+

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

IP Routing
Data Compression Advanced Interface Module (AIM)

(1)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IP Precedence for GRE Tunnels (GRE VPN)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Protocol-Independent Multicast (PIM) Version 2

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

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

Yes

Quality of Service
CLI String Search

(1)

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

Yes

Entity MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Expression MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OSPF Point to Multipoint

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Per Port Debugging (Conditionally Triggered Debugging)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

SNMP Manager

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Security
Additional Vendor-Proprietary RADIUS Attributes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Authenticating ACLs

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Automated Double Authentication

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Certificate Authority Interoperability

No

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Internet Key Exchange Security Protocol

No

Yes

Yes

Yes

Yes

No

Yes

Yes

No

IOS Firewall Feature Set

(1)

No

Yes

Yes

No

Yes

No

Yes

Yes

No

3DES Network Security

(2)

No

No

Yes

No

Yes

No

Yes

No

No

IPSec Network Security

No

No

No

Yes

Yes

No

No

No

No

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

Yes

Subblock Phase 1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Switching
Enhanced
ATM VC Configuration and Management

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Multiple ISDN Switch Types

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Voice/Multimedia
Voice over IP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

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

Yes

Dialer Watch

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Interface Name Modularity

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Microsoft Point-to-Point Compression (MPPC)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Mobile IP

(1)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

MS Callback

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

National ISDN Switch Types

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

New and Changed Show Commands for the Cisco 2600 Series Routers

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Stackable Home Gateway

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Time-based Access List

(1)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

New and Changed Information

The following sections list the new features supported by the Cisco 2600 for Cisco IOS Release  12.0  T.


Note The Cisco 2620 and Cisco 2621 series routers are only available with Cisco IOS Release  12.0  XC and later. The ISDN BRI Voice over IP Voice Interface Card is only available in Release  12.0  XD and later. For more information, refer to the "Early Deployment Releases" section.

New Features in Release 12.0(2)T

The following software enhancement is available for the Cisco 2600 in Cisco IOS Release 12.0(2)T.

Triple DES Encryption

IPSec supports the Triple DES  encryption algorithm (168-bit) in addition to 56-bit encryption. Triple DES (3DES) is a strong form of encryption that allows sensitive information to be transmitted over untrusted networks. It enables customers, particularly in the finance industry, to utilize network layer encryption.

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 T 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.

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 open and resolved caveats for the current Cisco IOS maintenance release only. For information on caveats in all maintenance releases, refer to the refer to the Caveats for Cisco  IOS Release 12.0 T   document that accompanies these release notes, and is located on CCO and the Documentation CD-ROM.

Caveats in Cisco IOS Release12.0 also apply to Release 12.0 T. For information on caveats in the Cisco IOS Release 12.0, refer to the "Caveats" section in the cross-platform Release Notes for Cisco  IOS Release 12.0  document located on CCO and the Documentation CD-ROM. This section contains caveats affecting all maintenance releases.


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.

Open Caveats---12.0(2)T

This section describes possibly unexpected behavior by Release 12.0(2)T. This section describes only severity 1 and 2 caveats.

IP Routing Protocols

When you use sparse-mode PIM multicast, the multicast tree may take a few minutes to stabilize after the routers are booted. During this period, "PATH" messages sent to multicast addresses are not delivered, and RSVP path and reservation sessions are not established. This is a transient phenomenon that occurs only when the routers are being booted. Once the multicast tree stabilizes, paths and reservations are established quickly. This problem does not occur in unicast or dense-mode multicast networks.
Workaround: Use sparse-dense or dense mode PIM multicast, if possible.

Miscellaneous

If flow-acceleration is enabled, then disabled, and encryption is subsequently enabled, the router may unexpectedly reload.
Workaround: Avoid enabling and then disabling flow-acceleration.
The IP portion of an incoming call might not terminate correctly if the caller closes the connection. This situation is the result of rare timing conditions. There is no workaround.
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.
Workaround: turn off fast switching with the no ip route-cache command on the ISDN interfaces.
Description: Cisco  800  series  routers configured for multilink and STAC compression experience a page leak after prolonged usage. This condition is rare (roughly 1 in 50 units experience it) and may take several days to manifest, depending on the number of calls.
Symptoms: Performance degrades until the unit thrashes; that is, the router runs so slowly that no useful work is accomplished. This is accompanied by continuous and heavy blinking of the OK LED.
Workaround: Disable multilink or disable STAC compression. A soft or hard reset (for example, reload command or power cycle) is the only way to clear the problem once it occurs.

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: Do not configure interfaces with the same IPX network number.

Wide-Area Networking

A Cisco router might fail to reply to an Address Resolution Protocol (ARP) incoming on the Bridged Virtual Interface (BVI) when the ARP table is clean. The following error message appears if "debug arp" is turned on: "00:50:23: IP ARP req filtered src 10.1.1.254 0000.0c32.ed77, dst 10.1.1.1 0000.0000.0000 wrong cable, interface Virtual-Access."
Workaround: To install the ARP entries, initiate traffic from the router and force an incoming ARP BVI reply.
Removing a dialer interface while a call is up can result in the loss of use of one B channel.
Workaround: A reload of the router will bring the B channel back.

Resolved Caveats---Release 12.0(2)T

All the caveats listed in this section are resolved in Release 12.0(2)T. This section describes only severity 1 and 2 caveats.

IP Routing Protocols

On some platforms, for example the Cisco  7200  series  routers, RIP does not get enabled on Token Ring interfaces. The output of the sh ip proto command will indicate "Reset all is OK."
Workaround: Configure router rip on the router before configuring the address on the interface. A shut command followed by a no shut command might also bring up RIP 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), and 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. 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 below are available for the Cisco 2600. 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: Access Servers or 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: Access Servers or Modular Access Routers: Cisco 2600 Series Routers

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

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 documents provide information for the Cisco IOS software documentation set: configuration guides and command references.

To access these documents on CCO, follow this path:

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

To access these documents on the Documentation CD-ROM, follow this path:

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

Release 12.0 Documentation Set

Table 7 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: Configuration Guides and Command References

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

Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References

.

Table 7: 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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