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Table of Contents

Release Notes for Cisco 4000 Series for Cisco IOS Release 12.1 T

Release Notes for Cisco 4000 Series for Cisco IOS Release 12.1 T

July 24, 2000

Note   You can find the most current Cisco IOS documentation on Cisco Connection Online (CCO ). These electronic documents may contain updates and modifications made after the hardcopy documents were printed.

These release notes for the Cisco 4000 series describe the enhancements provided in Cisco IOS Release 12.1(3) T. These release notes are updated as needed.

For a list of the software caveats that apply to Cisco IOS Release 12.1 T, see Caveats for Cisco IOS Release 12.1 T  that accompanies these release notes. The caveats document is updated for every maintenance release and is located on CCO  and the Documentation CD-ROM.

Use these release notes with the Cross-Platform Release Notes for Cisco IOS Release 12.1  located on CCO  and the Documentation CD-ROM.

Contents

These release notes describe the following topics:

System Requirements

This section describes the system requirements for Release 12.1(3) T:

Memory Recommendations


Table 1: Memory Requirements for the Cisco 4000 Series
Feature Set by Platform Image Name Recommended
Flash Memory 		Recommended
DRAM Memory 		Runs From

Cisco 4500/
4500-M,
Cisco 4700/
4700-M

IP

c4500-i-mz

8 MB

32 MB

RAM

IP Plus

c4500-is-mz

8 MB

32 MB

RAM

IP Plus IPsec 56

c4500-is56i-mz

8 MB

32 MB

RAM

IP Plus IPsec 3DES

c4500-ik2s-mz

8 MB

32 MB

RAM

IP/IPX/AT/DEC

c4500-d-mz

8 MB

32 MB

RAM

IP/IPX/AT/DEC Plus

c4500-ds-mz

8 MB

32 MB

RAM

Enterprise Plus

c4500-js-mz

16 MB

32 MB

RAM

Enterprise Plus IPsec 56

c4500-js56i-mz

16 MB

32 MB

RAM

Enterprise Plus IPsec 3DES

c4500-jk2s-mz

16 MB

32 MB

RAM

Enterprise/SNASw Plus

c4500-a3js-mz

16 MB

32 MB

RAM

Enterprise/SNASw Plus IPsec 56

c4500-a3js56i-mz

16 MB

32 MB

RAM

Enterprise/SNASw Plus IPsec 3DES

c4500-a3jk2s-mz

16 MB

32 MB

RAM

Cisco 4700-M

DistributedDirector

c4500-w3-mz

16 MB

32 MB

RAM

Hardware Supported

Cisco IOS Release 12.1(3) T supports the Cisco 4000 series routers:

Note   Because of memory limitations, Cisco 4000 and 4000-M routers are not supported by Cisco IOS Release 12.1 T. These platforms will continue to be supported by Cisco IOS Release 12.1 and earlier releases.

Table 2 lists the interfaces supported by the Cisco 4000 series.


Table 2: Supported Interfaces
Interface, Network Module, or Data Rate Platforms Supported

LAN Interfaces

ATM Interface

Cisco 4500 and Cisco 4700

Ethernet

Cisco 4500 and Cisco 4700

Fast Ethernet

Cisco 4500 and Cisco 4700

Token Ring

Cisco 4500 and Cisco 4700

FDDI

Cisco 4500 and Cisco 4700

Serial

Cisco 4500 and Cisco 4700

HSSI

Cisco 4500 and Cisco 4700

ISDN BRI

Cisco 4500 and Cisco 4700

Channelized E1/T1 ISDN PRI

Cisco 4500 and Cisco 4700

ATM OC-3c

Cisco 4500 and Cisco 4700

ATM DS-3

Cisco 4500 and Cisco 4700

ATM E3

Cisco 4500 and Cisco 4700

WAN Data Rates

48/56/64 kbps

Cisco 4500 and Cisco 4700

1.544/2.048 Mbps

Cisco 4500 and Cisco 4700

WAN Interfaces and Network Modules

56K/64K DSU/CSU

Cisco 4500 and Cisco 4700

Channelized E1

Cisco 4500 and Cisco 4700

Channelized T1

Cisco 4500 and Cisco 4700

E1-G.703/G.704

Cisco 4500 and Cisco 4700

EIA/TIA-232

Cisco 4500 and Cisco 4700

EIA/TIA-449

Cisco 4500 and Cisco 4700

EIA/TIA-613 (HSSI)

Cisco 4500 and Cisco 4700

EIA-530

Cisco 4500 and Cisco 4700

ISDN BRI

Cisco 4500 and Cisco 4700

ISDN PRI

Cisco 4500 and Cisco 4700

MultiChannel Interface (Channelized E1/T1)

Cisco 4500 and Cisco 4700

Serial

Cisco 4500 and Cisco 4700

V.35

Cisco 4500 and Cisco 4700

X.21

Cisco 4500 and Cisco 4700

Determining the Software Version

To determine the version of Cisco IOS software running on your Cisco 4000 series router, log in to the router and use the show version EXEC command:

router>#show version
Cisco Internetwork Operating System Software
IOS (tm) 4500 Software (C4500-JS-MZ), Version 12.1(3) T, RELEASE SOFTWARE

Upgrading to a New Software Release

For general information about upgrading to a new software release, see the product bulletin Cisco IOS Upgrade Ordering Instructions  on CCO at:

Technical Documents: Product Bulletins: Software: General System Software Bulletins

Feature Set Tables

Cisco IOS software is packaged in feature sets consisting of software images--depending on the platform. Each feature set contains a specific set of Cisco IOS features.


Table 3: Feature Sets Supported by the Cisco 4000 Series
Feature Set Feature Set Matrix Term Software Image Platforms Supported

IP Standard Feature Sets

IP

Basic1

c4500-i-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

IP Plus

Plus2

c4500-is-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

IP Plus IPsec 56

Plus, Plus IPsec 563

c4500-is56i-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

IP Plus IPsec 3DES

Plus, Plus IPsec, 3DES4

c4500-ik2s-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

IP/IPX/Apple Talk/DEC Standard
Feature Sets

IP/IPX/AppleTalk/DEC

Basic

c4500-d-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

IP/IPX/AppleTalk/DEC Plus

Plus

c4500-ds-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

Enterprise Standard
Feature Sets

Enterprise Plus

Plus

c4500-js-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

Enterprise Plus IPsec 56

Plus, Plus IPsec 56

c4500-js56i-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

Enterprise Plus IPsec 3DES

Plus, Plus IPsec 56, 3DES

c4500-jk2s-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

Enterprise/
SNASw
Standard Feature Set

Enterprise/SNASw Plus

Plus

c4500-a3js-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

Enterprise/SNASw Plus IPsec 56

Plus,
Plus IPsec 56

c4500-a3js56i-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

Enterprise/SNASw Plus IPsec 3DES

Plus, Plus IPsec, 3DES

c4500-a3jk2s-mz

Cisco 4500/4500-M, Cisco 4700/4700-M

Distributed-
Director Standard Feature Set

DistributedDirector

Distributed-
Director

c4500-w3-mz

Cisco 4700-M

1This feature set is offered in the basic feature set.
2This feature set is offered in the Plus feature set.
3This feature set is offered in the encryption feature sets which consist of IPsec 56-bit (Plus IPsec 56) data encryption feature sets.
4This feature set is offered in the encryption feature sets which consist of Triple DES (3DES) Encryption data encryption feature sets.

Caution Cisco IOS images with strong encryption (including, but not limited to 168-bit (3DES) data encryption feature sets) are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States are likely to require an export license. Customer orders may be denied or subject to delay due to United States government regulations. When applicable, purchaser/user must obtain local import and use authorizations for all encryption strengths. Please contact your sales representative or distributor for more information, or send an e-mail to export@cisco.com.

Table 4 and Table 5 list the features and feature sets supported by Cisco IOS Release 12.1(3) T for the Cisco 4500, 4500-M, 4700, and 4700-M.

All tables use the following conventions to identify features:

Note   This feature set table only contains a selected list of features. This table is not cumulative--nor does it list all the features in each image.


Table 4: Feature List by Feature Set for the Cisco 4500/4500-M and 4700/4700-M--Part 1 of 2
Feature Sets
Features IP IP
Plus 		IP Plus
40 		IP Plus
IPsec 56 		IP Plus IPsec 3DES IP/IPX/
AT/DEC 		IP/IPX/
AT/DEC
Plus
New Features
Bridging between IEEE 802.1Q vLANs

No

No

No

No

No

No

No

CEF Support for IP Routing between IEEE 802.1Q vLANs

No

Yes

Yes

Yes

Yes

Yes

Yes

Event MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Frame Relay ELMI Address Registration

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Individual SNMP Trap Support

Yes

Yes

Yes

Yes

Yes

Yes

Yes

PPP over ATM SVC

Yes

Yes

Yes

Yes

Yes

Yes

Yes

SNMP Support for IOS vLAN Subinterfaces

No

Yes

Yes

Yes

Yes

Yes

Yes

Secure Shell Version 1 Integrated Client

No

No

No

Yes

Yes

No

No

Connectivity
Layer 2 Tunnel Protocol (L2TP)

No

Yes

Yes

Yes

Yes

No

Yes

L2TP Dial Out

No

Yes

Yes

Yes

Yes

No

Yes

Multicast Source Discovery Protocol

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OS_IFSS

Yes

Yes

Yes

Yes

Yes

Yes

Yes

PPP over Ethernet

No

Yes

Yes

Yes

Yes

No

No

RIP Enhancements

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Ease of Use
Interface MIB Implementation for ATM Subinterfaces1

No

Yes

Yes

Yes

Yes

No

Yes

IBM Support
DLSw+ Ethernet Redundancy

No

Yes

Yes

Yes

Yes

No

Yes

DLSW RSVP

No

Yes

Yes

Yes

Yes

No

Yes

IP/IPX Routing
Airline Product Set

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Bidirectional PIM

Yes

Yes

Yes

Yes

Yes

Yes

Yes

DNS for X.25

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Easy IP Phase 2-DHCP Server

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Flow WRED

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IPX Multilayer Switching

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Multilayer Switching for IP Multicast

No

Yes

Yes

Yes

Yes

Yes

Yes

Multicast Routing Monitor

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OSPF Flooding Reduction

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OSPF Packet Pacing

Yes

Yes

Yes

Yes

Yes

Yes

Yes

PGM Router Assist

Yes

Yes

Yes

Yes

Yes

Yes

Yes

WCCP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

X.25 Load Balancing

Yes

Yes

Yes

Yes

Yes

Yes

Yes

X.25 Remote Failure Detection

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Management
CNS Client for Cisco IOS Software

No

No

No

Yes

Yes

No

No

CNS Client for Cisco IOS (IPsec Policy Agent II)

No

No

No

No

No

No

No

ISDN MIB RFC 2127

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Network Director Forwarding Agent

No

Yes

Yes

Yes

Yes

No

Yes

Process MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Service Assurance Agent

Yes

Yes

Yes

Yes

Yes

Yes

Yes

SNMPv3

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Subnetwork Bandwidth Manager

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Quality of Service
CLI String Search

Yes

Yes

Yes

Yes

Yes

Yes

Yes

COPS for RSVP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

LANE Fast SSRP

No

Yes

Yes

Yes

Yes

No

Yes

MPLS VPN

No

No

No

No

No

No

No

MPLS Class of Service

No

No

No

No

No

No

No

Express Resource Transport Protocol and TCP Header Compression

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Reliability
Pragmatic General Multicast

No

No

No

No

No

No

No

Scalability
IETF-Compliant PPP over ATM Scalability

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Security
AAA Server Group Deadtimer

Yes

Yes

Yes

Yes

Yes

Yes

Yes

X.25 Closed User Groups

No

Yes

Yes

Yes

Yes

No

Yes

Switching
Cisco IOS STP Enhancements

No

Yes

Yes

Yes

Yes

No

Yes

MPLS Traffic Engineering

No

No

No

No

No

Yes

Yes

SNA Switching Services

No

No

No

No

No

No

No

X.25 Switch Local Acknowledgment

No

Yes

Yes

Yes

Yes

No

Yes

WAN Services
Annex G (X.25 over Frame Relay)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

ATM LANE FSSR Protocol

No

Yes

Yes

Yes

Yes

No

Yes

ATM PVC Trap Support

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Cisco IOS IEEE 802.1Q

No

Yes

Yes

Yes

Yes

Yes

Yes

Dynamic Multiple Encapsulation for Dial-in over ISDN

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Frame Relay End-to-End Keepalive

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Frame Relay Switching Enhancements: Shaping and Policing

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Mobile IP

No

Yes

Yes

Yes

Yes

No

Yes

Time-based Access List

Yes

Yes

Yes

Yes

Yes

Yes

Yes
1Available on the Cisco 4500 only.


Table 5: Feature List by Feature Set for the Cisco 4500/4500-M and 4700/4700-M--Part 2 of 2
Feature Sets
Features Enterprise
Plus 		Enterprise Plus IPsec 56 Enterprise Plus
IPsec 3DES 		Enterprise/
SNASw Plus 		Enterprise/
SNASw Plus
IPsec 56 		Enterprise/
SNASw Plus
IPsec 3DES 		Distributed-
Director
New Features
Bridging between IEEE 802.1Q vLANs

Yes

Yes

Yes

Yes

Yes

Yes

No

CEF Support for IP Routing between IEEE 802.1Q vLANs

Yes

Yes

Yes

Yes

Yes

Yes

No

Event MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Frame Relay ELMI Address Registration

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Individual SNMP Trap Support

Yes

Yes

Yes

Yes

Yes

Yes

Yes

PPP over ATM SVC

Yes

Yes

Yes

Yes

Yes

Yes

Yes

SNMP Support for IOS vLAN Subinterfaces

Yes

Yes

Yes

Yes

Yes

Yes

No

Secure Shell Version 1 Integrated Client

No

Yes

Yes

No

Yes

Yes

No

Connectivity
Layer 2 Tunnel Protocol (L2TP)

Yes

Yes

Yes

Yes

Yes

Yes

No

L2TP Dial Out

Yes

Yes

Yes

Yes

Yes

Yes

No

Multicast Source Discovery Protocol

Yes

Yes

Yes

Yes

Yes

Yes

No

OS_IFSS

Yes

Yes

Yes

Yes

Yes

Yes

Yes

PPP over Ethernet

Yes

Yes

Yes

Yes

Yes

Yes

No

RIP Enhancements

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Ease of Use
Interface MIB Implementation
for ATM Supinterfaces

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IBM Support
DLSw+ Ethernet Redundancy

Yes

Yes

Yes

Yes

Yes

Yes

No

DLSW RSVP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IP/IPX Routing
Airline Product Set

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Bidirectional PIM

Yes

Yes

Yes

Yes

Yes

Yes

Yes

DNS for X.25

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Easy IP Phase 2-DHCP Server

Yes

Yes

Yes

Yes

Yes

Yes

No

Flow WRED

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IPX Multilayer Switching

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Multilayer Switching for IP Multicast

Yes

Yes

Yes

Yes

Yes

Yes

No

Multicast Routing Monitor

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OSPF Flooding Reduction

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OSPF Packet Pacing

Yes

Yes

No

Yes

Yes

Yes

Yes

Policy Routing Infrastructure

Yes

Yes

Yes

Yes

Yes

Yes

Yes

PGM Router Assist

Yes

Yes

Yes

Yes

Yes

Yes

Yes

WCCPv2 Support

Yes

Yes

Yes

Yes

Yes

Yes

Yes

X.25 Load Balancing

Yes

Yes

Yes

Yes

Yes

Yes

Yes

X.25 Failure Remote Detection

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Management
CNS Client for Cisco IOS Software

Yes

Yes

Yes

Yes

Yes

Yes

No

CNS Client for Cisco IOS (IPsec Policy Agent II)

Yes

Yes

Yes

Yes

Yes

Yes

No

ISDN MIB RFC 2127

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Network Director Forwarding Agent

Yes

Yes

Yes

Yes

Yes

Yes

No

Process MIB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Service Assurance Agent

Yes

Yes

Yes

Yes

Yes

Yes

Yes

SNMPv3

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Subnetwork Bandwidth Manager

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Quality of Service
CLI String Search

Yes

Yes

Yes

Yes

Yes

Yes

Yes

COPS for RSVP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

LANE Fast SSRP

Yes

Yes

Yes

Yes

Yes

Yes

No

MPLS VPN

Yes

Yes

Yes

Yes

Yes

Yes

No

MPLS Class of Service

Yes

Yes

Yes

Yes

Yes

Yes

No

Express Resource Transport Protocol and TCP Header Compression

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Reliability
Pragmatic General Multicast

Yes

Yes

Yes

Yes

Yes

Yes

No

Scalability
IETF-Compliant PPP over ATM Scalability

Yes

Yes

Yes

Yes

Yes

No

Security
AAA Server Group Deadtimer

Yes

Yes

Yes

Yes

Yes

Yes

Yes

X.25 Closed User Groups

Yes

Yes

Yes

Yes

Yes

Yes

No

Switching
Cisco IOS STP Enhancements

Yes

Yes

Yes

Yes

Yes

Yes

No

MPLS Traffic Engineering

Yes

Yes

Yes

Yes

Yes

Yes

No

SNA Switching Services

No

No

No

Yes

Yes

Yes

No

X.25 Switch Local Acknowledgement

Yes

Yes

Yes

Yes

Yes

Yes

No

WAN Services
Annex G

Yes

Yes

Yes

Yes

Yes

Yes

Yes

ATM LANE FSSR Protocol

Yes

Yes

Yes

Yes

Yes

Yes

No

ATM PVC Trap Support

Yes

Yes

Yes

Yes

Yes

Yes

No

Cisco IOS IEEE 802.1Q

Yes

Yes

Yes

Yes

Yes

Yes

No

Dynamic Multiple Encapsulation for Dial-in over ISDN

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Frame Relay Switching Enhancements: Shaping and Policing

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Frame Relay End to End Keepalive

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Mobile IP

Yes

Yes

Yes

Yes

Yes

Yes

No

Time-Based Access List

Yes

Yes

Yes

Yes

Yes

Yes

Yes

New and Changed Information

The following sections list the new hardware and software features supported by the Cisco 4000 series for Cisco IOS Release 12.1 T.

New Hardware Features in Release 12.1(3) T

There are no new hardware features supported by the Cisco 4000 series in Cisco IOS Release 12.1(3) T.

New Hardware Features in Release 12.1(2) T

There are no new hardware features supported by the Cisco 4000 series in Cisco IOS Release 12.1(2) T.

New Software Features in Release 12.1(3) T

The following new software features are supported by the Cisco 4000 series for Cisco IOS Release 12.1(3) T.

Bridging between IEEE 802.1Q vLANs

This feature supports integrated routing and bridging, transparent bridging, and PVST+ between vLANs (virtual LANs) with IEEE 802.1Q encapsulation features. It provides the ability to connect a network of hosts over a simple bridging-access device to a remote access concentrator. This feature supports the following IEEE 802.1Q (Dot1q) functionality:

CEF Support for IP Routing between IEEE 802.1Q vLANs

The CEF Support for IP Routing between IEEE 802.1Q vLANs feature provides the support needed for a CEF feature module.

Event MIB

The Event MIB is an asynchronous notification mechanism standardized for use by network management systems using Simple Network Management Protocol (SNMP). The Event MIB provides the ability to monitor Management Information Base (MIB) objects on a local or remote system using SNMP and initiate simple actions whenever a trigger condition is met (for example, an SNMP trap can be generated when an object is modified). By allowing notifications based on events, the Network Management System (NMS) does not need to constantly poll managed devices to find out if something has changed. When combined with the Expression MIB support introduced in Cisco IOS Release 12.0(5)T, Event MIB support in Cisco IOS software provides a flexible and efficient way to monitor complex conditions on network devices.

PPP Over ATM SVC

PPP over ATM SVC implements standards-based PPP over ATM AAL5.

Frame Relay ELMI Address Registration (CSCdp36027)

The Frame Relay ELMI Address Registration feature enables a network management system (NMS) to detect connectivity among the switches and routers in a network using the Enhanced Local Management Interface (ELMI) protocol. During ELMI version negotiation, neighboring devices exchange their management IP addresses and ifIndex. The NMS polls the devices to collect this connectivity information.

Before this feature was introduced, NMS could detect only the topology of routers or the topology of switches. This new feature enables the NMS to detect switch and router interconnection and create an end-to-end network topology map for network administrators.

The Cisco Frame Relay MIB has been enhanced to support the new ELMI information. The NMS uses the MIB to extract the IP address and ifIndex of devices neighboring the managed device.

Secure Shell Version 1 Integrated Client

Secure Shell (SSH) is a protocol that provides a secure, remote connection to another router. There are currently two versions of SSH available, SSH Version 1 and SSH Version 2. Only SSH Version 1 is implemented in Cisco IOS.

The Secure Shell Version 1 Integrated Client feature is an application that runs on a reliable transport layer, such as TCP/IP, and provides strong authentication and encryption. The SSH client enables a Cisco router to make a secure, encrypted connection to another Cisco router or device running an SSH Version 1 server. This connection provides functionality that is similar to an outbound Telnet connection, except that the connection is encrypted. With authentication and encryption, the SSH client allows for a secure communication over an insecure network.

The SSH client in Cisco IOS will work with publicly and commercially available SSH servers. The SSH client supports DES, 3DES, and password authentication.

HSRP Support for ICMP Redirect Messages (CSCdp37610)

The HSRP (Hot Standby Router Protocol) Support for ICMP Redirect Message feature enables ICMP redirects on interfaces configured with HSRP. This functionality works by filtering outgoing ICMP redirect messages through HSRP, where the next-hop IP address may be changed to an HSRP virtual IP address.

Individual SNMP Trap Support (CSCdp97172)

The Individual SNMP Trap Support feature adds the ability to enable or disable SNMP system management notifications (traps) individually. SNMP traps that can be specified are "authentication", "linkup", "linkdown", and "coldstart". This feature expands the functionality of the snmp-server enable traps snmp command.

SNMP Support for IOS vLAN Subinterfaces (CSCdk25367)

This enhancement provides sparse table support for fastethernet subinterfaces similar to what is currently provided for frame-relay subinterfaces.

New Software Features in Release 12.1(2) T

The following new software features are supported by the Cisco 4000 series for Cisco IOS Release 12.1(2) T.

AAA Server Group Deadtimer

The AAA Server Group Deadtimer  feature allows each authentication, authorization, and accounting (AAA) server to be fully configured in the server group. Thus, it allows you to direct AAA traffic to separate groups of servers that have different operational characteristics.

With the introduction of this feature, deadtime has been added as a new attribute to the server group structure. In addition, a separate timer has been attached to each server host in every server group. Therefore, when a server is found to be unresponsive after numerous retransmissions and time-outs, the server is assumed to be dead. The timers attached to each server host in all server groups are triggered. In essence, the timers are checked and subsequent requests to a server (once it is assumed dead) are directed to alternate timers, if configured. When the network access server receives a reply from the server, it checks and stops all configured timers (if running) for that server in all server groups.

If the timer has expired, only the server to which the timer is attached is assumed to be alive. This becomes the only server that can be tried for later AAA requests using the server groups to which the timer belongs.

Bidirectional PIM

Bidirectional PIM  (bidir-PIM) is a variant of the Protocol Independent Multicast (PIM) suite of routing protocols for IP multicast. Bidir-PIM is derived from the mechanisms of Protocol Independent Multicast sparse mode (PIM SM) and shares many of its protocol elements. In short, bidir-PIM is PIM SM with shared tree, but no shortest path tree operations. Bidir-PIM also has unconditional forwarding of source traffic toward the RP upstream on the shared tree, but no registering process for sources as in PIM SM. These modifications are necessary and sufficient to allow forwarding of traffic in all routers solely based on the (*, G) multicast routing entries. This feature eliminates any source-specific state and allows scaling capability to an arbitrary number of sources.

COPS for RSVP

Common Open Policy Service  (COPS) is a protocol for communicating network traffic policy information to network devices. Resource ReSerVation Protocol (RSVP) is a means for reserving network resources--primarily bandwidth--to guarantee that applications transmitting end-to-end across the Internet will perform at the desired speed and quality.

Combined, COPS with RSVP gives network managers centralized monitoring and control of RSVP, including the ability to:

In so doing, COPS for RSVP supports the following crucial RSVP features:

Frame Relay Switching Enhancements

You can now configure frame relay (FR) traffic shaping  on switched PVCs. By applying traffic shaping to switched PVCs you enable a router to be used as a FR port concentrator in front of an FR switch. The FR switch will shape the concentrated traffic before sending it into the FR network.

OSPF Flooding Reduction

The explosive growth of the Internet has placed the focus on the scalability of Interior Gateway Protocols such as OSPF. Networks using OSPF are becoming larger every day and will continue to expand to accommodate the demand to connect to the Internet.

Internet Service Providers and customers with large networks have regularly complained that OSPF has a traffic overhead, even when the network topology is stable.

By design, OSPF requires link-state advertisements (LSAs) to be refreshed as they expire after 3600 sec. Some implementations have tried to improve the flooding by reducing the frequency to refresh from 30 min to around 50 min or so. This solution reduces the amount of refresh traffic but requires at least one refresh before the LSA expires.

The OSPF Flooding Reduction  feature works by reducing unnecessary refreshing and flooding of already known and unchanged information. To achieve this reduction, the LSAs are now flooded with the higher bit set, thus making them Do Not Age (DNA) LSAs.

New Hardware Features in Release 12.1(1)T

There are no new hardware features supported by the Cisco 4000 series in Cisco IOS Release 12.1(1)T.

New Software Features in Release 12.1(1)T

The following new software features are supported by the Cisco 4000 series for Cisco IOS Release 12.1(1)T.

Express RTP and TCP Header Compression

Before Cisco IOS Release 12.0(7)T, if compression of TCP or Real-Time Transport Protocol (RTP) headers was enabled, compression was performed in the process switching path. That meant that packets traversing interfaces that had TCP or RTP header compression enabled were queued and passed up to the process to be switched. This procedure slowed down transmission of the packet, and therefore some users preferred to fast switch uncompressed TCP and RTP packets.

Now, if TCP or RTP header compression is enabled, it occurs by default in the fast-switched path or the Cisco Express Forwarding-switched (CEF-switched) path, depending on which switching method is enabled on the interface. Furthermore, the number of TCP and RTP header compression connections was increased to 1000 connections each.

If neither fast switching nor CEF switching is enabled, then if TCP or RTP header compression is enabled, it will occur in the process-switched path as before.

PPP over Ethernet for ATM

The Point-to-Point Protocol over Ethernet (PPPoE) for ATM feature provides the ability to connect a network of hosts over a simple bridging-access device to a remote access concentrator. With this model, each host utilizes its own PPPoE stack and the user is presented with a familiar user interface. Access control, billing and type of service can be done on a per-user, rather than a per-site, basis. Before a point-to-point connection over Ethernet can be provided, each PPP session must learn the Ethernet address of the remote peer and establish a unique session identifier. A unique session identifier is provided by the PPPoE Discovery Stage protocol.

Pragmatic General Multicast

Pragmatic General Multicast (PGM)  is a reliable multicast transport protocol for multicast applications that require reliable, ordered, duplicate-free multicast data delivery from multiple sources to multiple receivers. PGM guarantees that a receiver in a multicast group either receives all data packets from transmissions and retransmissions, or can detect unrecoverable data packet loss. PGM is intended as a solution for multicast applications with basic reliability requirements. PGM has two main parts: a host element (also referred to as the transport layer of the PGM protocol) and a network element (also referred to as the network layer of the PGM protocol).

The transport layer of the PGM protocol consists of two main parts: a source part and a receiver part. The transport layer defines how multicast applications send and receive reliable, ordered, duplicate-free multicast data from multiple sources to multiple receivers. The PGM Host feature is the Cisco implementation of the transport layer of the PGM protocol.

The network layer of the PGM protocol defines how intermediate network devices (such as routers and switches) handle PGM transport data as the data flows through a network. The PGM Router Assist feature is the Cisco implementation of the network layer of the PGM protocol. Refer to the "IP Multicast" part of the Cisco IOS IP and IP Routing Configuration Guide for information about the PGM Router Assist feature.

Service Assurance Agent

The Service Assurance (SA) Agent  is an both an enhancement to and a new name for the Response Time Reporter (RTR) feature that was introduced in Cisco IOS Release 11.2. The feature allows you to monitor network performance between a Cisco router and a remote device (which can be another Cisco router, an IP host or a mainframe host by measuring key Service Level Agreement (SLA) metrics such as response time, network resources, availability, jitter, connect time, packet loss and application performance.This feature enables you to perform troubleshooting, problem analysis, and notification based on the statistics collected by the SA Agent.

The SA Agent Enhancements feature introduces new performance measurement operations and enhancements to assist in the measurement of SLAs. With Cisco IOS Release 12.1(1)T, the SA Agent provides new capabilities that enable you to:

Limitations and Restrictions

MIBs

Old Cisco Management Information Bases (MIBs) will be replaced in a future release. OLD-CISCO-* MIBs are currently migrated into more scalable MIBs--without affecting existing Cisco IOS products or NMS applications. You can update from deprecated MIBs to the replacement MIBs as shown in Table 6.


Table 6: Deprecated and Replacement 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

In Development

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

In Development

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

In Development

OLD-CISCO-VINES-MIB

CISCO-VINES-MIB

OLD-CISCO-XNS-MIB

In Development

Caveats

Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.

For information about caveats in Cisco IOS Release 12.1 T, see Caveats for Cisco IOS Release 12.1 T .

All caveats in Cisco IOS Release 12.1 are also in Release 12.1 T.

For information on caveats in Cisco IOS Release 12.1, see Caveats for Cisco IOS Release 12.1,  which lists severity 1 and 2 caveats, and 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. You can reach Bug Navigator II on CCO at: Software Center: Cisco IOS Software: Cisco Bug Toolkit: Cisco Bugtool Navigator II or at http://www.cisco.com/support/bugtools.

Related Documentation

The following sections describe the documentation available for Cisco 4000 series routers. These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents. Documentation is available as printed manuals or electronic documents.

Use these release notes with these documents:

Release-Specific Documents

The following documents are specific to Release 12.1(3) T and are located on CCO and the Documentation CD-ROM:

On CCO at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1:
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes for Cisco IOS Release 12.1
Technical Documents
See Caveats for Cisco IOS Release 12.1 , and Caveats for Cisco IOS Release 12.1 T ,  which contain caveats applicable to all platforms for all maintenance releases of Release 12.1 and Release 12.1 T.
On CCO at:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats: Caveats for Cisco IOS Release 12.1
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS 12.1: Caveats: Caveats for Cisco IOS Release 12.1
Note   If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. You can reach Bug Navigator II on CCO at: Software Center: Cisco IOS Software: Cisco Bug Toolkit: Cisco Bugtool Navigator II or at http://www.cisco.com/support/bugtools.

Platform-Specific Documents

These documents are available for the Cisco 4000 series on CCO and the Documentation CD-ROM:

On CCO at:

Technical Documents: Documentation Home Page: Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 4000 Series Routers

On the Documentation CD-ROM at:

Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 4000 Series Routers

Feature Modules

Feature modules describe new features supported by Release 12.1(3) T and are an update to the Cisco IOS documentation set. A feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the feature modules are available online on CCO or the documentation CD-ROM. The feature module information is incorporated in the next printing of the Cisco IOS documentation set.

On CCO:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation

On the Documentation CD-ROM:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation: New Features in Release 12.1

Cisco IOS Software Documentation Set

The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents that 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. You can use each configuration guide 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.

On CCO at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References

On the Documentation CD-ROM:

Cisco Products Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References

Release 12.1 Documentation Set

Table 7 describes the contents of the Cisco IOS Release 12.1 software documentation set, which is available in electronic form, and also in printed form upon request.

Note   You can find the most current Cisco IOS documentation on CCO and the Documentation CD-ROM. These electronic documents may contain updates and modifications made after the paper documents were printed.

On CCO at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1


Table 7: Cisco IOS Release 12.1 Documentation Set
Books Major Topics

  • Cisco IOS Configuration Fundamentals Configuration Guide

  • Cisco IOS Configuration Fundamentals Command Reference

Configuration Fundamentals Overview
Cisco IOS User Interfaces
Configuration Files
File Management
System Management

  • Cisco IOS Bridging and IBM Networking Configuration Guide

  • Cisco IOS Bridging and IBM Networking Command Reference, Volume I

  • Cisco IOS Bridging and IBM Networking Command Reference, Volume II

Transparent Bridging
Source-Route Bridging
Token Ring Inter-Switch Link
Remote Source-Route Bridging
DLSw+
Serial Tunnel and Block Serial Tunnel Commands
LLC2 and SDLC Commands
IBM Network Media Translation Commands
SNA Frame Relay Access Support Commands
NCIA Client/Server Commands
Airline Product Set Commands

  • Cisco IOS Dial Services Configuration Guide: Terminal Services

  • Cisco IOS Dial Services Configuration Guide: Network Services

  • Cisco IOS Dial Services Command Reference

Preparing for Dial Access
Modem Configuration and Management
ISDN and Signalling Configuration
PPP Configuration
Dial-on-Demand Routing Configuration
Dial-Backup Configuration
Terminal Service Configuration
Large-Scale Dial Solutions
Cost-Control Solutions
Virtual Private Networks
X.25 on ISDN Solutions
Telco Solutions
Dial-Related Addressing Services
Dial Access Scenarios

  • Cisco IOS Interface Configuration Guide

  • Cisco IOS Interface Command Reference

Interface Configuration Overview
Configuring LAN Interfaces
Configuring Serial Interfaces
Configuring Logical Interfaces

  • Cisco IOS IP and IP Routing Configuration Guide

  • Cisco IOS IP and IP Routing Command Reference

IP Overview
IP Addressing and Services
IP Routing Protocols
IP Multicast

  • Cisco IOS AppleTalk and Novell IPX Configuration Guide

  • Cisco IOS AppleTalk and Novell IPX Command Reference

AppleTalk and Novell IPX Overview
Configuring AppleTalk
Configuring Novell IPX

  • Cisco IOS Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Configuration Guide

  • Cisco IOS Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Command Reference

Overview
Configuring Apollo Domain
Configuring Banyan VINES
Configuring DECnet
Configuring ISO CLNS
Configuring XNS

  • Cisco IOS Multiservice Applications Configuration Guide

  • Cisco IOS Multiservice Applications Command Reference

Multiservice Applications Overview
Voice
Video
Broadband

  • Cisco IOS Quality of Service Solutions Configuration Guide

  • Cisco IOS Quality of Service Solutions Command Reference

Quality of Service Overview
Classification
Congestion Management
Congestion Avoidance
Policing and Shaping
Signalling
Link Efficiency Mechanisms
Quality of Service Solutions

  • Cisco IOS Security Configuration Guide

  • Cisco IOS Security Command Reference

Security Overview
Authentication, Authorization, and Accounting (AAA)
Security Server Protocols
Traffic Filtering and Firewalls
IP Security and Encryption
Configuring Passwords and Privileges
Neighbor Router Authentication:
Configuring IP Security Options

  • Cisco IOS Switching Services Configuration Guide

  • Cisco IOS Switching Services Command Reference

Cisco IOS Switching Services Overview
Cisco IOS Switching Paths
Cisco Express Forwarding
NetFlow Switching
MPLS Switching
Multilayer Switching
Multicast Distributed Switching
Virtual LANs

  • Cisco IOS Wide-Area Networking Configuration Guide

  • Cisco IOS Wide-Area Networking Command Reference

Introduction: Wide-Area Networking Overview
Configuring ATM
Configuring Frame Relay
Configuring Frame Relay-ATM Interworking
Configuring SMDS
Configuring X.25 and LAPB

  • Cisco IOS Software Command Summary

  • Cisco IOS Dial Services Quick Configuration Guide

  • Cisco IOS Configuration Guide Master Index

  • Cisco IOS Command Reference Master Index

  • Cisco IOS New Features Index

  • Cisco IOS Debug Command Reference

  • Cisco IOS System Error Messages

 

Note   Cisco Management Information Base (MIB) User Quick Reference is no longer published. For the latest list of MIBs supported by Cisco, see Cisco Network Management Toolkit on Cisco Connection Online. From CCO, click on the following path: Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIB.

Obtaining Documentation

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.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 is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/cgi-bin/subcat/kaojump.cgi.

Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).

Obtaining Technical Assistance

Cisco provides Cisco Connection Online (CCO) as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed docs, or by sending mail to Cisco.

Cisco Connection Online

Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.

You can access CCO in the following ways:

You can e-mail questions about using CCO to cco-team@cisco.com.

Technical Assistance Center

The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.

To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.

To contact by e-mail, use one of the following:

Language

E-mail Address

 English


 tac@cisco.com


 Hanzi (Chinese)


 chinese-tac@cisco.com


 Kanji (Japanese)


 japan-tac@cisco.com


 Hangul (Korean)


 korea-tac@cisco.com


 Spanish


 tac@cisco.com


 Thai


 thai-tac@cisco.com

In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.

Software Configuration Tips on the Cisco Technical Assistance Center Home Page

If you have a CCO login account, you can access the following URL, which contains links and tips on configuring your Cisco products:

http://www.cisco.com/kobayashi/technotes/serv_tips.shtml

This URL is subject to change without notice. If it changes, point your Web browser to CCO  and click on this path: Technical Assistance Center: Technical Tips. (You must have a CCO account to access this link.)

The following sections are provided from the Technical Tips page:

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:

Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate and value your comments.





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Posted: Fri Aug 4 17:19:20 PDT 2000
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