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Table of Contents

Release Notes for Access and Communication Servers for Cisco IOS Release 11.0

Release Notes for Access and Communication Servers for Cisco IOS Release 11.0

December 10, 1998

These release notes describe the features, modifications, and caveats for Cisco IOS Release 11.0, up to and including Release 11.0(22). They include all access server features and protocol translation features.

Cisco IOS Release 11.0(11) and all later 11.0 releases are considered to be "Generally Deployable." Cisco believes Release 11.0 is suitable for deployment anywhere in the network where the features and functionality are required.

Contents

These release notes discuss the following topics:

Determining Your Cisco IOS Software Release

To determine the version of Cisco IOS software running on your device, log in to your access server, and enter the show version User EXEC command:

router> show version

The following is sample output for a Cisco AS5100 access server. The Cisco IOS version appears in the second line:

Cisco Internetwork Operating System Software

IOS (tm) 5100 Software (C5100-JS-M), Version 11.0(22).......

The output includes more information including processor revision numbers, memory amounts, hardware IDs, and partition information.

Cisco IOS Platform Support in Release 11.0

Cisco IOS Release 11.0 supports the following access server platforms:

Table 1 summarizes the LAN interfaces supported on each platform. Table 2 summarizes the WAN data rates and interfaces supported on the Cisco 2500 series and Cisco AS5100.


Table 1: Interfaces Supported
Interface ASM-CS Cisco 2500 Series Cisco AS5100

Synchronous Serial

Yes

Yes

Yes

Ethernet (AUI)

Yes

Yes

Yes

4-Mbps Token Ring

Yes

Yes

No

16-Mbps Token Ring

Yes

Yes

No
Table 2: WAN Data Rates and Interfaces Supported
Cisco 2500 Series Cisco AS5100
Data Rate

48/56/64 kbps

Yes

Yes

1.544/2.048 Mbps

Yes

Yes

34/45/52 Mbps

No

No

Interface

EIA/TIA-232

Yes

Yes

X.21

Yes

Yes

V.35

Yes

Yes

EIA/TIA-449

Yes

Yes

EIA-530

Yes

Yes

EIA/TIA-613 (HSSI)

No

No

ISDN BRI

No

No

ISDN PRI

No

No

G.703/G.704

No

No

Related Documentation

All documents mentioned in this section are available as printed manuals or electronic documents. (See the "Online Navigation" section for more information on accessing electronic documentation.)

The following documentation is related to these release notes:

Cisco ASM-CS-Specific Documentation

The following documents are specific to the Cisco ASM-CS:

Cisco 2500 Series-Specific Documentation

The following document is specific to the Cisco 2500 series:

Cisco AS5100-Specific Documentation

The following documents are specific to the Cisco AS5100 access server:

Cisco IOS Documentation Set and Related Supporting Documents

Cisco IOS software documentation is listed in Table 3. Software documentation consists of the Cisco IOS configuration guides and command references and also includes several supporting documents. These documents are shipped with your order in electronic form on the Documentation CD-ROM, unless you specifically ordered the printed version of the documents.

The Cisco IOS configuration guides, command references, and chapter topics are as follows:


Table 3: Cisco IOS Software Documentation Set
Books Chapter Topics

  • Configuration Fundamentals Configuration Guide

  • Configuration Fundamentals Command Reference

Configuration Fundamentals Overview

Cisco IOS User Interfaces

File Management

Interface Configuration

System Management

  • 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

  • Wide-Area Networking Configuration Guide

  • Wide-Area Networking Command Reference

ATM

Frame Relay

SMDS

X.25 and LAPB

  • Security Configuration Guide

  • Security Command Reference

AAA Security Services

Security Server Protocols

Traffic Filtering

Network Data Encryption

Passwords and Privileges

Neighbor Router Authentication

IP Security Options

  • Dial Solutions Configuration Guide

  • Dial Solutions Command Reference

Dial Business Solutions and Examples

Dial-In Port Setup

DDR and Dial Backup

Remote Node and Terminal Service

Cost-Control and Large-Scale Dial Solutions

VPDN

  • Cisco IOS Switching Services Configuration Guide

  • Cisco IOS Switching Services Command Reference

Switching Paths for IP Networks

Fast Switching

Autonomous Switching

NetFlow Switching

Optimum Switching

Virtual LAN (VLAN) Switching and Routing

Inter-Switch Link Protocol Encapsulation

IEEE 802.10 Encapsulation

LAN Emulation

  • Bridging and IBM Networking Configuration Guide

  • Bridging and IBM Networking Command Reference

Transparent Bridging

Source-Route Bridging

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

IBM Channel Attach

  • Cisco IOS Software Command Summary

  • Dial Solutions Quick Configuration Guide

  • System Error Messages

  • Debug Command Reference

Note The Cisco Management Information Base (MIB) User Quick Reference publication is no longer being published. For the latest list of MIBs supported by Cisco, see the Cisco Network Management Toolkit on Cisco Connection Online (CCO). On CCO, go to Software and Support: Software Center: Network Management Products. Next, select Cisco Network Management Toolkit: Cisco MIBs.

Software Configuration Tips on the Cisco TAC Home Page

The following URL contains links to access helpful tips to configure your Cisco products:

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

This URL is subject to change without notice. If it does change, point your web browser to Cisco Connection Online (CCO) and follow this path:

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

See the "Cisco Connection Online" section for details.

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 from within the United States, call 888-50-CISCO (888-502-4726). From outside the United States, call 415-596-4408.

The following sections are provided from the Technical Tips page:

Online Navigation

You can access Cisco IOS software documentation, such as printed manuals and configuration notes, either at Cisco Connection Online (CCO) on the World Wide Web or on the Cisco Documentation CD-ROM.

Additional information about CCO and the Documentation CD-ROM can be found in the
"Cisco Connection Online" section and the "Documentation CD-ROM" section.

Platform-Specific Documentation

  Software & Support: Cisco Documentation: Access Servers and Access Routers: Modular Access Routers: Access Servers.
  Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Access Servers.

Cisco IOS Documentation Set and Related Supporting Documents

  Software & Suppor: Cisco Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.0.
  Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.0.

Cisco IOS Feature Sets

The Cisco IOS software is available in different feature sets depending on the platform. Table 4 lists the feature sets available on the Cisco 2500 series and the Cisco AS5100.

Note APPN is not supported on the Cisco AS5100.


Table 4: Cisco 2500 Series Access Servers and Cisco AS5100 Software Feature Sets
Feature IP IP/IBM
Base 		IP/IPX IP/IPX/
IBM Base 		IP/IPX/
APPN/
IBM 		Desktop Desktop/
IBM Base 		Enterprise Enterprise/APPN Remote Access Server

SNMP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Asynchronous support (SLIP)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

CSLIP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

ARA

—

—

—

—

—

Yes

Yes

Yes

Yes

Yes

Frame Relay (RFC 1490)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

SMDS

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

—

X.25

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

ISDN

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

—

PPP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

CPPP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

HDLC

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

IGRP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Enhanced IGRP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

OSPF

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

BGP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

EGP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

PIM

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

NHRP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

ES-to-IS

—

—

—

—

—

—

—

Yes

Yes

—

IS-to-IS

—

—

—

—

—

—

—

Yes

Yes

—

Snapshot routing

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

NTP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Bridging (transparent and translational)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

—

Multiring

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

LAN extension host

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

—

IPX

—

—

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

NLSP

—

—

Yes

Yes

Yes

Yes

Yes

Yes

Yes

—

RTMP

—

—

—

—

—

Yes

Yes

Yes

Yes

Yes

IPXWAN 2.0

—

—

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

AppleTalk Versions 1 and 2

—

—

—

—

—

Yes

Yes

Yes

Yes

Yes

AURP

—

—

—

—

—

Yes

Yes

Yes

Yes

Yes

DECnet IV

—

—

—

—

—

Yes

Yes

Yes

Yes

Yes

DECnet V

—

—

—

—

—

—

—

Yes

Yes

—

Apollo Domain

—

—

—

—

—

—

—

Yes

Yes

—

Banyan VINES

—

—

—

—

—

—

—

Yes

Yes

—

ISO CLNS

—

—

—

—

—

—

—

Yes

Yes

—

XNS

—

—

—

—

—

—

—

Yes

Yes

—

SRB/RSRB

—

Yes

—

Yes

Yes

—

Yes

Yes

Yes

—

DLSw+

—

Yes

—

Yes

Yes

—

Yes

Yes

Yes

—

SDLC

—

Yes

—

Yes

Yes

—

Yes

Yes

Yes

—

SDLLC

—

Yes

—

Yes

Yes

—

Yes

Yes

Yes

—

STUN

—

Yes

—

Yes

Yes

—

Yes

Yes

Yes

—

TG/COS

—

—

—

—

—

—

—

Yes

Yes

—

DSPU

—

—

—

—

—

—

—

Yes

Yes

—

QLLC

—

Yes

—

Yes

Yes

—

Yes

Yes

Yes

—

APPN

—

—

—

—

Yes

—

—

—

Yes

—

Bisync

—

Yes

—

Yes

Yes

—

Yes

Yes

Yes

—

Protocol translation

—

—

—

—

—

—

—

Yes

Yes

Yes

TN3270

—

—

—

—

—

—

—

Yes

Yes

Yes

LAT

—

—

—

—

—

—

—

Yes

Yes

Yes

XRemote

—

—

—

—

—

—

—

Yes

Yes

Yes

Telnet

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

AutoInstall

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

DHCP

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Memory Requirements

The Cisco IOS Release 11.0 software image size might exceed 4 MB. Also, the systems now require more than 1 MB of main system memory for data structure tables.

For the Cisco access servers to take advantage of the Release 11.0 features, you must upgrade the code or main system memory as listed in Table 5. Some platforms have specific chip or architecture requirements that affect what can be upgraded and in what increments.


Table 5: Cisco IOS Release 11.0 Minimum Memory Requirements
Platform Minimum Required Code Memory Minimum Required Main Memory Release 11.0 Runs from
ASM-CS


—


16 MB RAM


RAM

Cisco 2500 Series

IP Set1

4 MB Flash

4 MB RAM

Flash

IP/IPX Set

4 MB Flash

4 MB RAM

Flash

Desktop Set

8 MB Flash

4 MB RAM

Flash

Enterprise Set

8 MB Flash

6 MB RAM

Flash

Remote Access Server

4 MB Flash

4 MB RAM

Flash

Enterprise/APPN Set

8 MB Flash

8 MB RAM

Flash

IP/IPX/APPN/IBM Base Set

8 MB Flash

8 MB RAM

Flash

Desktop/IBM Base Set

8 MB Flash

4 MB RAM

Flash

IP/IPX/IBM Base Set

8 MB Flash

4 MB RAM

Flash

IP/IBM Base Set

8 MB Flash

4 MB Flash

Flash

AS51002

IP Set

4 MB Flash

6 MB RAM per card

Flash

IP/IPX Set

4 MB Flash

6 MB RAM per card

Flash

Desktop Set

8 MB Flash

6 MB RAM per card

Flash

Enterprise Set

8 MB Flash

6 MB RAM per card

Flash

Remote Access Server

4 MB Flash

6 MB RAM per card

Flash

Desktop/IBM Base Set

8 MB Flash

6 MB RAM

Flash

IP/IPX/IBM Base Set

8 MB Flash

6 MB RAM

Flash

IP/IBM Base Set

8 MB Flash

6 MB RAM

Flash

1For Cisco 2509 through 2512 access servers, Cisco 2522, and Cisco 2523, 4 MB of DRAM is the recommended minimum amount of memory.
2Memory requirements listed are per card. Each Cisco AS5100 supports up to three cards, so the maximum memory needed for any Cisco AS5100 is three times the listed number.

New Features in Release 11.0(5) and Later Releases

The following software enhancements have been added to Cisco IOS Release 11.0(5). There are no new features in software releases later than Release 11.0(5).

Note The first few maintenance releases of each new Cisco IOS software release might deliver additional new features. As you plan to deploy a new release, consider the importance of maximizing product capability versus operational stability. An early release of software should always be tried in a test network before it is deployed in a production network.

Cisco 2520, Cisco 2521, Cisco 2522, and Cisco 2523

The Cisco 2520 through Cisco 2523 models merge router and access server features to serve access and telecommuting requirements in a single platform. WAN aggregation, telecommuting, branch office, and IBM protocol applications are well-suited to these new Cisco devices.

The interfaces available in each model are shown below:

Cisco 2520

1 Ethernet, 2 high-speed synchronous serial, 2 low-speed synchronous/asynchronous serial, 1 ISDN BRI

Cisco 2521

1 Token Ring, 2 high-speed synchronous serial, 2 low-speed synchronous/asynchronous serial, 1 ISDN BRI

Cisco 2522

1 Ethernet, 2 high-speed synchronous serial, 8 low-speed synchronous/asynchronous serial, 1 ISDN BRI

Cisco 2523

1 Token Ring, 2 high-speed synchronous serial, 8 low-speed synchronous/asynchronous serial, 1 ISDN BRI

The low-speed serial interfaces (maximum speed 115.2 kbps) are capable of supporting both synchronous and asynchronous protocols.

New Features in Release 11.0(4)

The following software enhancement has been added to Release 11.0(4).

Payload Compression for Frame Relay

This feature was previously unavailable in Release 11.0. It allows payload compression of data within Frame Relay packets. Compression is performed on a packet-by-packet basis, yielding a compression ratio of approximately 1.5 to 1, depending on the packet and data characteristics. The command frame-relay payload-compress packet-by-packet is included.

New Features in Release 11.0(3)

The following software enhancements have been added to Release 11.0(3).

Dynamic Address Mapping for IPX over SMDS

The smds glean interface configuration command is included in the feature set of Release 11.0(3). The smds glean command dynamically creates SMDS to higher-level protocol address mappings from incoming packets, thereby making the need for static map configuration for the IPX protocol optional rather than required. However, any static map configuration will override the dynamic maps.

IP Address Pooling Changes

IP address pooling provides a pool of IP addresses from which an incoming interface can provide an IP address to a remote node through the IP Control Protocol (IPCP) address negotiation process. In Cisco IOS Release 11.0(3), the IP address pooling feature is enhanced to allow configuration of a global default address pooling mechanism, a per-interface configuration of the mechanism to use, and a per-interface configuration of a specific address or pool name to use. Cisco IOS Release 11.0(3) also enhances the flexibility of configuration by allowing multiple types of pooling to be active simultaneously.

Multivendor Flash SIMM Support

With Release 11.0(3), you can use Flash SIMMs from multiple vendors, as long as the total size of each SIMM is equal, and the SIMMs are installed in one of the combinations shown in Table 6 (for the Cisco 2500 series).

Multivendor Flash memory support is restricted to platforms that use Rxboot Version 10.2(7a) or later, and Cisco IOS Release 10.2(8), 10.3(6), or 11.0(3) or later.

Cisco 2500 series routers have two slots for Flash SIMMs. Table 6 provides the supported SIMM configurations.
Table 6: Cisco 2500 Series Flash SIMM Support
SIMM Size Vendor Flash Bank Considerations

4 MB

Intel (1Mbx8)

single

None

4 MB/4 MB

Intel/Intel (1Mbx8)

dual

None

4 MB/4 MB

Intel/AMD (1Mbx8)

dual

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 11.0(3) or later

  • 10.3(6) or later

  • 10.2(8) or later

8 MB

Intel (2Mbx8)

single

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 11.0(1) or later

  • 10.3(1) or later

  • 10.2(2) or later

  • 10.0(6) or later

8 MB/8 MB

Intel/Intel (2Mbx8)

dual

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 11.0(1) or later

  • 10.3(1) or later

  • 10.2(2) or later

  • 10.0(6) or later

8 MB/8 MB

Intel/AMD (2Mbx8)

dual

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 11.0(3) or later

  • 10.3(6) or later

  • 10.2(8) or later

4 MB

AMD (1Mbx8)

single

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 10.0(11) or later

  • 10.2(7) or later

  • 10.3(4) or later

4 MB/4 MB

AMD/AMD (1Mbx8)

dual

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 10.0(11) or later

  • 10.2(7) or later

  • 10.3(4) or later

8 MB

AMD (2Mbx8)

single

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 10.0(11) or later

  • 10.2(7) or later

  • 10.3(4) or later

8 MB/8 MB

AMD/AMD (2Mbx8)

dual

This configuration requires rxboot Release 10.2(7a) or later. It also requires one of the following Cisco IOS Releases:

  • 10.0(11) or later

  • 10.2(7) or later

  • 10.3(4) or later

PPP Callback

Cisco IOS Release 11.0(3) supports PPP callback, which provides a client server relationship between the end points of a point-to-point serial connection. PPP callback allows a router to request that a dial-up peer router call back. The callback feature can be used to control access and toll costs between the routers. This feature is a partial implementation of the PPP Callback specifications in RFC 1570.

New Features in Release 11.0(2)

The following new software features were added to Cisco IOS Release 11.0(2).

QLLC and Bisync

The QLLC and Bisync features are included in the following feature sets for the Cisco 2500 series access servers and Cisco AS5100 access server:

New Features in Release 11.0(1)

This section describes new features and enhancements in Release 11.0(1) of the access server software.

General Features

This section describes general features that are new in the initial release of Cisco IOS Release 11.0.

  Conversations are sorted into two categories—Those that are attempting to use a lot of bandwidth with respect to the interface capacity (for example, FTP) and those that need less (for example, interactive traffic). For streams that use less bandwidth, the queuing algorithm always attempts to provide access with little or no queuing and shares the remaining bandwidth among the other conversations.

Backbone Protocol Routing Features

This section describes the backbone protocol routing features that are new in the initial release of Cisco IOS Release 11.0.

TCP/IP Features

The following features have been added to the Cisco IOS TCP/IP software:

System Management

AAA/TACACS+ Phase II has been added to the Cisco system management functionality. This upgrade to Authentication, Authorization, and Accounting/Terminal Access Controller Access Control System Plus (AAA/TACACS+) adds accounting to the existing facilities in TACACS+.

Interfaces

The following features have been added to the Cisco interface configuration functionality:

Telecommuting Services

The following features have been added to the Cisco telecommuting service functionality:

Desktop Protocol Features

This section describes the desktop protocol features that are new in the initial release of Cisco IOS Release 11.0.

AppleTalk Features

The following features have been added to the Cisco IOS AppleTalk software:

  Benefits of using NBP filters include:

Novell Features

Sequence Packet Exchange (SPX) spoofing has been added to the Cisco IOS Novell software. Some SPX-based services in a Novell environment use SPX watchdog packets to verify the integrity of end-to-end communications when guaranteed and sequenced packet transmission is required. SPX spoofing enables the Cisco IOS software to receive, recognize, and successfully acknowledge watchdog packets at both the server end and the client end of the wide-area link. Requests for the transmission of legitimate information triggers the dial-up connection. SPX spoofing can drastically reduce communications costs associated with dial-on-demand circuits.

Wide-Area Networking Features

This section describes the wide-area networking features that are new in the initial release of Cisco IOS Release 11.0.

Frame Relay

The following features have been added to the Cisco IOS Frame Relay software:

New MIB Support

The following new Management Information Bases (MIBs) are available:

Important Notes

This section describes warnings and cautions about using the Cisco IOS Release 11.0 software. It discusses the following topics:

X.25 Problem in 11.0(2)

Cisco IOS Release 11.0(2) contains a software defect, affecting all platforms, that involves an unexpected router reload when X.25 is configured. This defect, CSCdi40956, is not present in Release 11.0(1) and is fixed by Release 11.0(3).

Setup Information

As of Cisco IOS Release 11.0(1), the Access and Communication Servers Getting Started Guide has been discontinued. Configuration information using the setup facility previously published in this document is now contained in the user guide that ships with each product.

Upgrading to a New Software Release

If you are upgrading to Cisco IOS Release 11.0 from an earlier Cisco IOS software release, you should save your current configuration file before configuring your access server with the Cisco IOS Release 11.0 software in the event that an unrecoverable error occurs during download or configuration.

IP Multicast and mrouted

Version 3.3 of mrouted, which was announced on August 26, 1994, has a multicast trace route facility that does not work through Cisco access servers. Cisco access servers have multicast tracing utilities that can be used to manage multicast internetworks. An interoperable solution will be provided in a maintenance release of Cisco IOS Release 11.0.

Forwarding of Locally Sourced AppleTalk Packets

Our implementation of AppleTalk does not forward packets with local source and destination network addresses. This behavior does not conform to the definition of AppleTalk in Apple Computer's Inside AppleTalk publication. However, this behavior is designed to prevent any possible corruption of the AppleTalk Address Resolution Protocol (AARP) table in any AppleTalk node that is performing MAC-address gleaning.

Caveats for Releases 11.0(1) through 11.0(22)

This section describes possibly unexpected behavior by Release 11.0(22). Unless otherwise noted, these caveats apply to all 11.0 releases, up to and including 11.0(22).

Basic System Services

  On a Cisco 7000 series router, if you replace one interface processor (for example, a TRIP or an FSIP) with a different type of interface processor online, the show ip interface brief and show interface commands display information for both the old and new controllers. Rarely, this also results in the continual reinitialization of the newly inserted controller.
  The only known workaround is to completely unconfigure the old card before replacing it with the new card. Sometimes, it might even be necessary to enter a write erase command, reboot the router, and then redefine the existing interfaces to completely remove all configuration traces of the old card. Once the information that is displayed by the show commands is self-consistent, the newly inserted card behaves normally.
  When configuration contains aaa commands, bootrom Release 11.0(10c) will show error messages and will not work.

DECnet

  Under certain conditions, DECnet does not send triggered routing updates after an adjacency comes up. If (periodic) routing updates are sent out frequently (default frequency being 40 seconds), there is no problem because an update gets sent out in a short time, and routes are learned. However, if the routing update timer has been configured to be a large value, routes mgiht not be learned even after a long time.
  The workaround is to configure a smaller value for the routing update timer.

IBM Connectivity

  When the Native Service Point feature is configured in the router using Frame Relay media as follows, the lsap number always shows 0:
  bugs(config)#$sna host NETHOST xid-snd 05d26198 dlci 68 rsap 4 lsap 20 focalpoint
  ! sna host NETHOST xid-snd 05d26198 dlci 68 rsap 4 lsap 0 focalpoint !

Interfaces and Bridging

  If a serial interface is set to loopback via a hardware signal, the interface will remain in loopback until the hardware signal is dropped, and a no loopback interface configuration command is issued.

IP Routing Protocols

  An external spf calculation might be triggered every 35 to 40 seconds if both of the following occur:
  To work around this problem, either remove the static route, or prevent the unreachable forwarding address from being included in the external LSA. To avoid a unreachable forwarding address, make sure that any ASBRs redistributing between different ospf domains have the fix for CSCdi63983.

ISO CLNS

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

Miscellaneous

  When running Cisco 2523 and 2524 serial ports in asynchronous mode, modem control is only supported when using DTE style 5-in-1 cables (to connect to DCE devices). The DCE 5-in-1 cable (to connect to DTE devices) will not support modem control for the asynchronous mode. To support DTE deviceswith modem control, you must use the DTE style cables with a null modem adapter.
  A software forced crash occured once on a Cisco 4500 router. There is no known workaround at this time.

Wide-Area Networking

  When changing the encapsulation of an ISDN or dialer interface from Frame Relay to X.25 or LAPB, the router might reload. To work around this problem, configure HDLC before configuring X.25 on the dialer interface.
  The SSCOP layer sequence number wraparound conditions lead to memory leaks and memory fragmentation problems. The problem occurs when the the sscop's send sequence number reaches a maximum value of 16777215. The switch needs to be reset to continue normal functionality.
  The problem can also arise in routers. The ATM interface needs to be shut/no shut to defer the problem (resets the sequence counters). This reset may also be used to free buffer resources in a system that has encountered the SSCOP wrap but not yet crashed.

Caveats for Release 11.0(1) through 11.0(21)

This section describes possibly unexpected behavior by Release 11.0(21). Unless otherwise noted, these caveats apply to all 11.0 releases, up to and including 11.0(21). For additional caveats applicable to Release 11.0(21), see the previous caveats section.

All the caveats listed in this section are resolved in Release 11.0(22).

Basic System Services

  From the login prompt, it is possible to recover fragments of lines typed by the previous user of the same physical or virtual terminal line. This might represent a security exposure. A complete description and details are at http://www.cisco.com/warp/public/770/ioshist-pub.shtml.

Interfaces and Bridging

  The router might become very busy and hang up because the token ring does not filter those forwarded decnet multicast frames if permanent bridging entry and decnet are configured. There is no known workaround.

IP Routing Protocols

  The following platforms might reload with a bus error or segv after a show ip eigrp event, show ipx eigrp event, show appletalk eigrp event, or enabling eigrp event logging: Cisco 1000, 2500, 2600, 3800, 4000, 5200, and 7000 (RP/SP). Other platforms, including the Cisco 3600, 4500, 4700, 5300, 7000 (RSP), 7200, 7500, 8500, and RSM might display the record a spurious memory access.
  The eigrp event log is invalid on all platforms.
  The workaround to this problem is to not display the event log or enable eigrp event-logging. Additionally, the event-log can be disabled by performing (from within configuration mode on the router):
  IP
  router eigrp <as> eigrp event-log-size 0
  IPX
  ipx router eigrp <as> event-log-size 0
  Appletalk
  appletalk eigrp event-log-size 0

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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Posted: Thu Mar 1 18:26:18 PST 2001
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