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Release Notes for Cisco 6400 Universal Access Concentrator (UAC) for NRP Cisco IOS Release 11.3(8)DB1

Release Notes for Cisco 6400 Universal Access Concentrator (UAC) for NRP Cisco IOS Release 11.3(8)DB1

March 15, 1999

These release notes describe new features and caveats for the Cisco 6400 universal access concentrator (UAC) node route processor (NRP) supported in Cisco IOS Release11.3(8)DB1.

Use this release note in conjunction with the cross-platform Release Notes for Cisco IOS Release 11.3 located on Cisco Connection Online (CCO) and the Documentation CD-ROM.

For a list of software caveats that apply to this release, refer to the "Caveats" section later in this document.

Contents

These release notes discuss the following:

Introduction

The Cisco 6400 UAC is a broadband concentrator that supports Cisco Systems' end-to-end ATM transmission services, PPP termination services, and tunneling services. The NRP is the routing processor for the Cisco 6400 UAC. It receives traffic from interfaces connected to one or more node switch processor (NSP) switch ports, reassembles the ATM cells into packets, routes packets, segments routed packets, and sends them back to the ATM switch for output to the network.

Detailed software configuration information on the new features and Cisco IOS commands supported by Release 11.3 are available on the Documentation CD-ROM and on the Web at http://www.cisco.com. For more information, refer to the "Related Documentation" section later in this document.

This release note does not describe features that are available in IOS Release 11.3. For more information about features in IOS Release 11.3, refer to Release Notes for Cisco IOS Release 11.3.

System Requirements

This section describes the system requirements for the Cisco 6400 UAC NRP and includes the following sections:

Memory Requirements

Table 1 describes the memory requirements for the Cisco 6400 NRP.


Table 1: Cisco 6400 NRP Memory Requirements
Platforms Image Name Minimum Required Flash Disk Required Main Memory Runs from

Cisco 6400 NRP

c6400-p5-mz

8 MB Flash

64 MB DRAM

RAM

Supported Hardware

Cisco IOS Release 11.3(8)DB1 supports the Cisco 6400 NRP.

Caution NRPs with a part number of 800-03655-03 or higher will only work with Cisco IOS Release 11.3(8)DB1. To upgrade to Release 11.3(8)DB1 software, see the "Cisco Connection Online" section.

The following interfaces are supported by the Cisco 6400 NRP:

Feature Set Table

The 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 Cisco 6400 NRP can only use a single image called c6400-p5-mz. Table 2 lists the features supported by the Cisco 6400 NRP image.

Note This feature set table contains only a selected list of features. This table is not a cumulative or complete list of all the features in this image.


Table 2: Feature List for the Cisco 6400 NRP
Layer 2 and Layer 3 Protocols

ARP

IPCP

IP forwarding

IP host

IP multicast

PPP/ATM

TCP

Telnet

TFTP

UDP

Transparent bridging

VLAN

Layer 3 Routing Protocols

EIGRP

IS-IS

OSPF

PIM

RIP

Network Management, Security

AAA

CHAP

FTP

RADIUS

SNMP

TACACS

LAN Interfaces

ATM

Ethernet (10BaseT)

Fast Ethernet (100BaseTX)

Determining Your Cisco IOS Software Release

To determine the version of Cisco IOS software currently running on your router, log on to the Cisco 6400 NRP and enter the show version EXEC command:

router> show version

An output appears similar to the following. The Cisco IOS version appears in the second line. 

Cisco Internetwork Operating System Software 
IOS (tm) 6400 Software (c6400-p5-mz), Version 11.3(8)DB1.......

The output includes additional information including processor revision numbers, memory amounts, hardware IDs, and partition information. To upgrade to a new software release, see the "Cisco Connection Online" section.

New and Changed Information

The following sections list the new features supported by the Cisco 6400 NRP in Cisco IOS Release 11.3(8)DB1.

New Software Features in Cisco IOS Release 11.3(8)DB1

The following new software enhancements are supported by the Cisco 6400 NRP for Release 11.3(8)DB1.

Layer 2 Forwarding

The Cisco 6400 NRP now supports the Layer 2 Forwarding (L2F) protocol with up to 500 PPP sessions at a given time. Layer 2 Tunneling Protocol (L2TP) is not supported.

New Hardware Features in Cisco IOS Release 11.3(8)DB1

No new features were introduced for the Cisco 6400 NRP in Cisco IOS Release 11.3(7)DB.

New Features in Cisco IOS Release 11.3(7)DB

No new features were introduced for the Cisco 6400 NRP in Cisco IOS Release 11.3(7)DB.

New Features in Cisco IOS Release 11.3(5)DB

No new features were introduced for the Cisco 6400 NRP in Cisco IOS Release 11.3(5)DB.

Caveats

This section contains open and resolved caveats for the current Cisco 6400 NRP release only. Caveats in Cisco IOS Release 11.3(8) also apply to Release 11.3(8)DB1. For information about caveats in the Cisco IOS Release 11.3(8), refer to the "Caveats" sections in the Cross-Platform Release Notes for Cisco IOS Release 11.3 document located on CCO and the Documentation CD-ROM.

Open Caveats - Release 11.3(8)DB1

This section describes possibly unexpected behavior by Release 11.3(8)DB1. This section describes severity 1, 2, and selected severity 3 caveats.

Under certain conditions, an open shortest path first (OSPF) adjacent relationship established through an L2F tunnel configured over the NRP ATM interface may fail to properly exchange OSPF routes.
There are two methods available to work around this issue:
After receiving a multicast group prune message, the NRP will correctly refrain from forwarding multicast packets to the destination group over the interface. However, the status of the multicast group is displayed incorrectly in the output of the show ip mroute command.
Using an access list on a Web Cache Control Protocol (WCCP) enabled interface stops all WCCP cache redirection. A WCCP access list with an explicit deny statement denies all clients.
OSPF adjacency may not form over an ATM subinterface. The OSPF neighbor adjacency can be reestablished by entering the shutdown/no shutdown command on the affected interface.
Enhanced Interior Gateway Routing Protocol (EIGRP) routes may not always propagate over inter-switch link (ISL) subinterfaces on the NRP Fast Ethernet interface. To propagate EIGRP routes, enter the shutdown/no shutdown command on the interface.
In the NRP show interface atm 0/0/0 command, the number of output packets is not equal to the number of input packets less the number of output queue drops. This condition is limited to bridged virtual interfaces.
A large number of PPP sessions (approximately 1000) may display a "memory exhaustion" error message if each session is carrying heavy traffic. The memory is recovered eventually, just slowly. This is an expected and temporary result of heavy traffic with large number of PPP sessions.
Enabling integrated routing and bridging (IRB) on atm0/0/0 and the trying to ping this bridged interface results in a failure. However, when you ping from atm0/0/0 to the connected bridged interface, the ping succeeds. Pinging from the ATM interface to the bridged interface allows all subsequent pings in either direction. To work around this issue, enter the clear arp command on the atm0/0/0 router.
If you have heavy traffic in a "router-on-a-stick" configuration, the CPUHOG message on the Cisco 6400 UAC NRP with heavy bridging traffic may show the "ATM Periodic" process as the offending task.
When creating a subscriber policy with more than 10 subscribers, multicast and unknown destination options are not executed correctly. To work around this issue, create subscriber policies with less than 10 subscribers.
You cannot configure two virtual circuits on the same virtual path identifier (VPI) that differ by 1024. For example, if virtual channel identifier (VCI) 100 exists with a VPI of 10 and you add VCI 1124, the router refused to create that VC. To work around this issue, use a different VPI/VCI combination for the virtual circuit. For example, use a VPI of 11 and a VCI of 100.
Using a definitive IP address for the peer default ip address command in a virtual-template does not work. To work around this problem, enter the peer default ip address pool name command and then create a local IP pool using the ip local pool name <start_address_range> <end_address_range> command.
Occasionally, after receiving high rates of traffic over the ATM PVC between the NSP and NRP, the NRP counters may show incorrect packet counts.
The Cisco 6400 UAC NRP console might stop displaying messages when the NRP processes a large configuration file. To work around this problem, do one of the following:
With more than 500 PPP sessions running across L2F tunnels, the PPP sessions may not be able to be successfully reestablished if the ATM port is shut down and brought back up while traffic is running through it. To work around this problem, remove the PPP clients before shutting down the ATM interface, and then bring them up in groups of 100 PPP sessions at a time.
When running PPP sessions over L2F tunnels, a PPP session may occasionally drop, renegotiate an IP address, and reestablish the connection. This happens even in stable environments with little or no traffic running. This has no effect on overall PPP performance.
When configuring a pair of NRPs configured for redundancy, each NRP should possess the same amount of memory (DRAM).
If the primary NRP contains more memory than the secondary NRP, the secondary NRP will be shut down, and the primary NRP will issue a message stating that the secondary NRP has insufficient memory for a redundant configuration.
If the secondary NRP contains more memory than the primary NRP, both NRPs will boot successfully. This configuration is only recommended when upgrading the amount of memory on both NRPs. Upgrade the memory on the secondary NRP first, reconfigure it as the primary, and then upgrade memory on the original primary NRP.

Resolved Caveats-Release 11.3(8)DB1

All the caveats in this section are resolved in Release 11.3(8)DB1. This section describes severity 1, 2, and selected severity 3 caveats.

When configuring xDSL subscriber interfaces to bridge, with the bridged group virtual interface (BVI) on redundant Cisco 6400 UAC NRPs as their default gateway, a switchover between redundant Cisco 6400 UAC NRPs could result in the new primary Cisco 6400 UAC NRP having a different BVI MAC address. In this case, subscribers will use the old MAC address and will get no response.
To work around this issue, statically configure the MAC address of BVI interfaces so that both Cisco 6400 UAC NRPs use the same address.
With 1000 virtual circuits configured, a SYS-2-MALLOCFAIL message "Memory allocation problem with the pool manager process" may appear.
The Cisco 6400 primary NRP might reload with a memory allocation error when configured for redundant NRP operation. To work around this issue, turn off NRP redundancy configuration.
Resolved with the 12.0(2)DB NSP image. Integrated Local Management Interface (ILMI) PVC discovery may not operate after rebooting the NSP.
A PPP-over-ATM connection may be unstable if any PPP timeout is configured.
The NME interface on an NRP reports its status and linestat as up when there is no cable attached.
If a User Datagram Protocol (UDP) packet with an invalid length is sent to port 514 (the "syslog" port) on an IOS device, the device is likely to reload. In this situation, a stack trace might not be saved. Such packets are sent by the popular nmap port scanning program.
You can work around this vulnerability by preventing any affected Cisco IOS device from receiving or processing UDP datagrams addressed to its port 514. This can be done either using packet filtering on surrounding devices, or by using input access list filtering on the affected IOS device itself.
If you use an input access list, that list should be applied to all interfaces to which attackers may be able to send datagrams. This includes not only physical LAN and WAN interfaces, but virtual subinterfaces of those physical interfaces, as well as virtual interfaces and/or interface templates corresponding to GRE, L2TP, L2F, and other tunneling protocols.
The input access list must block traffic destined for any of the Cisco IOS device's own IP addresses, as well as for any broadcast or multicast addresses on which the Cisco IOS device may be listening. It's important to remember to block old-style "all-zeroes" broadcasts as well as new-style "all-ones" broadcasts.
There is no single input access list that will work in all configurations. It is very important that you understand the effect of your access list in your specific configuration before you activate the list.
The following example shows a possible access list for a three-interface router, along with the configuration commands needed to apply that access list. The example assumes no need for input filtering other than as a workaround for this vulnerability.
! Deny all multicasts, and all unspecified-net broadcasts, to port 514
access-list 101 deny udp any 224.0.0.0 31.255.255.255 eq 514
! Deny old-style unspecified-net broadcasts
access-list 101 deny udp any host 0.0.0.0 eq 514
! Deny network-specific broadcasts. This example assumes that all of
! the local interfaces are on the class B network 172.16.0.0, subnetted
! everywhere with mask 255.255.255.0. This will differ from network
! to network. Note that we block both new-style and old-style broadcasts.
access-list 101 deny udp any 172.16.0.255 0.0.255.0 eq 514
access-list 101 deny udp any 172.16.0.0   0.0.255.0 eq 514
! Deny packets sent to the addresses of our own network interfaces.
access-list 101 deny udp any host 172.16.1.1 eq 514
access-list 101 deny udp any host 172.16.2.1 eq 514
access-list 101 deny udp any host 172.16.3.3 eq 514
! Permit all other traffic (default would be to deny)
access-list 101 permit ip any any
 
! Apply the access list to the input side of each interface
interface ethernet 0
ip address 172.16.1.1 255.255.255.0
ip access-group 101 in
 
interface ethernet 2
ip address 172.16.2.1 255.255.255.0
ip access-group 101 in
 
interface ethernet 3
ip address 172.16.3.3 255.255.255.0
ip access-group 101 in
It can be complicated to list all possible addresses, and especially all possible broadcast addresses, to which attack packets might be sent. If you do not expect to receive any legitimate syslog traffic on an interface, you may wish to simply block all syslog traffic arriving on that interface. Remember that this will affect traffic routed through the Cisco IOS device as well as traffic destined to the device.
Input access lists have an impact on system performance, and should be installed with a degree of caution, especially on systems that are running very near their capacity limits.
A bus error can result when changing traffic shaping parameters on an ATM PVC, while traffic is being transmitted over the virtual circuit. To work around this issue, change traffic shaping parameters when no traffic is being transmitted on the selected VC.
When IP route cache is enabled on an NRP interface over which an L2F tunnel is defined, packets may be dropped. The workaround is to disable IP route cache.
When running PPP sessions over L2F tunnels, PPP sessions may drop. Once sessions drop, they will continuously try to reestablish connections and drop again. This happens even in stable environments with little or no traffic running.
When using up to 500 PPP sessions with L2F, it may not be possible to simultaneously authenticate all of the PPP sessions. This will result in the failure of some PPP sessions to be authenticated. To work around this issue, bring up and tear down PPP sessions in groups of no more than 250 at a time.

Related Documentation

This section describes the documentation related to the Cisco 6400 UAC NRP, typically including hardware installation guides, software installation guides, Cisco IOS configuration and command references, system error messages, and feature modules that are updates to the Cisco IOS documentation set. Documentation is available as printed manuals or electronic documents, except for the feature modules that are available online only.

The most up-to-date documentation can be found on the Web via Cisco Connection Online (CCO) and on the latest Documentation CD-ROM. These electronic documents might contain updates and modifications made after the paper documents were printed. For information on CCO, refer to the "Cisco Connection Online" section later in this document. For more information on the CD-ROM, refer to the "Documentation CD-ROM" section later in this document.

Release-Specific Documentation

The following documents are specific to Release 11.3. They are located on CCO and the Documentation CD-ROM:

To reach the cross-platform Release Notes for Cisco IOS Release 11.3 from the CCO home page, click on this path:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Product-Specific Release Notes for Cisco IOS Release 11.3
To reach the cross-platform Release Notes for Cisco IOS Release 11.3 on the Documentation CD-ROM, click on this path:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Product Specific Release Notes for Cisco IOS Release 11.3: Cross-Platform Release Notes for Cisco IOS Release 11.3
To reach these documents from the CCO home page, click on this path:
Service & Support: Technical Documents

Feature Modules

Feature modules describe new features supported by Release 11.3 T. Feature modules are available online only. In the next printing of the Cisco IOS documentation set, feature modules will be included as updates to the Cisco IOS Documentation set/ Each feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference.

Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Release Notes for Cisco IOS Release 11.3: New Features in Release 11.3
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Release Notes for Cisco IOS Release 11.3: New Features in Release 11.3

Release-Specific Documentation

The documents listed in Table 3 are available for the Cisco 6400 UAC. These documents are also available online at Cisco Connection Online (CCO) and on the Documentation CD-ROM.

To access Cisco 6400 documentation on CCO, follow this path:

Service and Support: Technical Documents: Documentation Home Page: DSL Products: Cisco 6400

To access Cisco 6400 documentation on the Documentation CD-ROM, follow this path:

DSL Products: Cisco 6400


Table 3: Platform Documents for the Cisco 6400 Universal Access Concentrator
Book Chapter Topics

Cisco 6400 UAC Hardware Installation Guide

About This Manual
Hardware Description
Preparing for Installation
Installing the Cisco 6400
Troubleshooting
Maintaining the Cisco 6400
System Specifications
Glossary
Configuration Worksheets
Installing the AC-Input Power Shelf and Power Supply

Cisco 6400 UAC Command Reference Guide

This guide describes all of the commands specific to the Cisco 6400, organized in alphabetic order.

Cisco 6400 UAC Site Planning Guide

About This Guide
Cisco 6400 Overview
Site Planning Considerations
System Specifications
Cabling Specifications
Glossary

Regulatory Compliance and Safety Information for the Cisco 6400

Overview of the Cisco 6400 Universal Access Concentrator
General Documentation Information
Agency Approvals
Translated Safety Warnings
Cisco Connection Online

Cisco 6400 UAC Software Configuration Guide

About This Manual
Understanding the Command Line Interface for the Cisco 6400 UAC
Configuring Terminal Lines and Modem Support
Using the Cisco 6400 Web Console Application for System Configuration
Initially Configuring the Cisco 6400
Configuring Redundancy and SONET APS
Configuring Interfaces
Configuring the NRP
Configuring Virtual Connections
Configuring System Management Functions
Configuring Operation, Administration, and Maintenance
Configuring Resource Management
Configuring ILMI
Configuring ATM Routing and PNNI
Using Access Control
Configuring IP-Over-ATM and LAN Emulation
Configuring ATM Accounting and ATM RMON
Configuring Tag Switching
Configuring Signaling Features
Configuring Special Features
PNNI Migration Examples
Cisco 6400 MIB Information
Resolving Error Messages
Glossary

Cisco 6400 FRU Installation and Replacement

Tools and Equipment Required
General Safety Precautions and Maintenance Guidelines
Replacing the Front Cover
Powering Down the System
Backing Up the PCMCIA Card
Maintaining the Air Filter
Replacing an NSP Module
Replacing an NRP Module
Installing or Replacing a Half-Height NLC
Replacing a PEM
Replacing the Blower Module and Fans
Verifying Plug-In Module and Component Installation

Cisco IOS Software Documentation

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

To reach these documents on the CCO home page, click on this path:

Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Cisco IOS 11.3 Configuration Guides, Command References: Configuration Guide Master Index or Command Reference Master Index

To reach these documents on the Documentation CD-ROM, click on this path:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Cisco IOS 11.3 Configuration Guides, Command References: Configuration Guide Master Index or Command Reference Master Index

Release 11.3 Documentation Set

Table 4 details the contents of the Cisco IOS Release 11.3 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 reach software documents from the CCO home page, click on this path:

Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 11.3

To reach software documentation on the Documentation CD-ROM, click on this path:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3

.
Table 4: Cisco IOS Software Release 11.3 Documentation Set
Books Chapter Topics

  • Configuration Fundamentals Configuration Guide

  • Configuration Fundamentals Command Reference

Configuration Fundamentals Overview
Cisco IOS User Interfaces
File Management
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 and Firewalls
IP Security and Encryption
Passwords and Privileges
Neighbor Router Authentication
IP Security Options

  • Cisco IOS Interface Configuration Guide

  • Cisco IOS Interface Configuration Guide

Interface Configurations

  • 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 Switching Services Configuration Guide

  • Cisco IOS Switching Services Command Reference

Switching Paths for IP Networks
Virtual LAN (VLAN) Switching and Routing

  • 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
Cisco Database Connection
NCIA Client/Server Topologies
Cisco Mainframe Channel Connection
Airline Product Set

  • 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 Guide

  • Quality of Service Solutions Command Reference

Classification
Scheduling
Packet Drop
Traffic Shaping
ATM QoS
SNA QoS
Line Protocols

  • Configuration Guide Master Index

  • Command Reference Master Index

 

  • Cisco IOS Software Command Summary

  • Cisco IOS System Error Messages

  • Debug Command Reference

  • Dial Solutions Quick Configuration Guide

 

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

Service and Support

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

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 shipped with your product.

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

Software Configuration Tips on the Cisco TAC Home Page

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

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

This URL is subject to change without notice. If it changes, point your web browser to http://www.cisco.com/, and follow this path: Software & Support, Technical Support, Technical Tips.

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 the Cisco 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: Fri Mar 10 13:23:57 PST 2000
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