Cisco SOHO Series - Release 12.1(5)YB
Cisco SOHO Series - Release Notes for Release 12.1(5)YB
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Table Of Contents

Release Notes for the Cisco SOHO 70 Series for Cisco IOS Release 12.1(5)YB

Contents

System Requirements

Memory Requirements

Hardware Supported

Determining Your Software Release

Upgrading to a New Software Release

Feature Set Tables

New and Changed Information

New Software Features in Release 12.1(5)YB

PPPoE MTU Adjustment

Caveats

Resolved Caveats - Release 12.1(5)YB5

Management

Caveats for Release 12.1(5)YB3

Resolved Caveats - Release 12.1(5)YB3

Unresolved Caveats - Release 12.1(5)YB3

CSCdu21252

Resolved Caveats - Release 12.1(5)YB1

CSCdt19816

Related Documentation

Release-Specific Documents

Platform-Specific Documents

Feature Modules

Feature Navigator

Cisco IOS Software Documentation Set

Documentation Modules

Release 12.1 Documentation Set

Obtaining Documentation

World Wide Web

Documentation CD-ROM

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco.com

Technical Assistance Center

Contacting TAC by Using the Cisco TAC Website

Contacting TAC by Telephone


Release Notes for the Cisco SOHO 70 Series for Cisco IOS Release 12.1(5)YB

February 20, 2002

These release notes for the Cisco SOHO 70 series routers describe the enhancements provided in Cisco IOS Release 12.1(5)YB, up to and including Release 12.1(5)YB5. These release notes are updated as needed. Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.1 located on Cisco.com and the Documentation CD-ROM.

For a list of the software caveats that apply to Cisco IOS Release 12.1(5)YB5, see the "Caveats" section and Caveats for Cisco IOS Release 12.1 T. The caveats document is updated for every maintenance release and is located on Cisco.com and the Documentation CD-ROM.

Contents

These release notes discuss the following topics:

•System Requirements

•New and Changed Information

•Caveats

•Related Documentation

•Obtaining Documentation

•Obtaining Technical Assistance

System Requirements

This section describes the system requirements for Release 12.1(5)YB5 and includes the following sections:

•Memory Requirements

•Hardware Supported

•Determining Your Software Release

•Upgrading to a New Software Release

•Feature Set Tables

Memory Requirements

Table 1 Memory Requirements for the Cisco SOHO Series 

Platform Name
Software Image
Flash Memory
DRAM Memory
Runs from

SOHO 76 and SOHO 77

soho70-y1-mz

8 MB

16 MB

RAM


Hardware Supported

Cisco IOS Release 12.1(5)YB5 supports the Cisco SOHO series routers:

•SOHO 76

•SOHO 77

The SOHO 76 and SOHO 77 are small office and home office (SOHO) asymmetric digital subscriber line (ADSL) routers each with one Ethernet interface for connection to a service provider networks.

The SOHO routers also provide the following key hardware features:

•Connection to an ADSL network through an ADSL port.

•A central processing unit: 50 MHz MPC 855T RISC processor.

•Ability to be stacked or mounted on a wall.

•Locking power connectors and a Kensington-compatible locking slot.

For detailed descriptions of the new hardware features, see the "New and Changed Information" section.

Table 2 Supported Interfaces for the Cisco SOHO 70 Series 

Router
Ethernet Ports
ADSL Ports
Console Ports

SOHO 76 and SOHO 77

One 10BaseT (RJ-45)

RJ-45

RJ-45


Determining Your Software Release

To determine the version of Cisco IOS software running on your Cisco SOHO 70 series, log in to the router and enter the show version EXEC command: 

router> show version

Cisco Internetwork Operating System Software 

IOS (tm) Software (soho70-y1-mz), Version 12.1(5)YB5, RELEASE SOFTWARE

Upgrading to a New Software Release

For general information about upgrading to a new software release, see Upgrading the Cisco IOS Software Release in Cisco Routers and Modems located at:

http://www.cisco.com/warp/public/620/6.html

Note This resource contains general upgrade information only. Currently, there is no information pertaining to the Cisco SOHO series specifically.

Feature Set Tables

The 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. Release 12.1(5)YB5 supports the same feature sets as Releases 12.1 and 12.1 T, but Release 12.1(5)YB5 can include new features supported by the Cisco SOHO series routers.

Table 3 lists the features and feature sets supported by the Cisco SOHO series routers in Cisco IOS Release 12.1(5)YB5, and uses the following conventions:

•Yes—The feature is supported in the software image.

•No—The feature is not supported in the software image.

Note This table might not be cumulative or list all the features in each image. You can find the most current Cisco IOS documentation on Cisco.com. These electronic documents may contain updates and modifications made after the hardcopy documents were printed.

Table 3 Feature List by Feature Set for the Cisco SOHO Series 

 
Feature Set
Features
soho70-y1-mz
   
Address Conservation
 

DHCP Client Address Negotiation

Yes

IPCP Address Negotiation

Yes

NAT

Yes

Bandwidth Optimization
 

NetBIOS Name Caching

No

STAC Compression

Yes

Business-Class Quality of Service
 

CBR, VBRnrt, UBR Traffic Classes

Yes

Class-Based Weighted Fair Queuing

No

IP Policy Routing

No

Per-Virtual Circuit Queuing

No

Per-Virtual Circuit Shaping

No

Weighted Random Early Detection

No

Business-Class Security
 

GRE Tunneling

No

IP Basic and Extended Access Lists

Yes

NetBIOS Access Lists

No

PAP, CHAP, Local Password

Yes

Route and Router Authentication

Yes

Ease of Use and Deployment
 

Cisco Fast Step Software

No

Easy IP Phase I and II

Yes

PPPoE MTU Adjustment

Yes

Enhanced Security
 

Cisco IOS Firewall

No

Context-Based Access Control Lists

No

Denial-of-Service Detection

No

IPSec Encryption with 3DES and L2TP

No

Java Blocking

No

Real-Time Alerts

No

LAN
 

IP

Yes

IPX

No

Transparent Bridging

Yes

Management
 

CiscoView

No

SNTP

Yes

SNMP, Telnet, Console Port

Yes

Syslog

Yes

TACACS+ (also a security feature)

No

TFTP Client and Server

Yes

Routing
 

IP Enhanced IGRP

No

IP Multicast (relay only)

No

IP-Policy Routing

No

IPX RIP/SAP IPX WAN

No

RIP, RIPv2

Yes


New and Changed Information

The following section lists the new software features supported by the Cisco SOHO series for Release 12.1(5)YB5 and above.

New Software Features in Release 12.1(5)YB

The following new software features are supported by the Cisco SOHO 70 series for Cisco IOS Release 12.1(5)YB and above:

PPPoE MTU Adjustment

If a SOHO70 series router terminates the PPPoE traffic, a computer connected to the Ethernet interface may have problems accessing Web sites because the default Maximum Transmission Unit (MTU) configured on the PCs may be too high. The default MTU is 1460. The solution is to let the router automatically reduce the value of the Maximum Segment Size (MSS) inside the TCP SYN packets transmitted by the PCs by entering the following command on the router's Ethernet interface:

ip adjust-mss mss

where mss must be 1452 or less to fix the PPPoE MTU problem.

This command works only if NAT is configured.

Configuration Example

The following example shows a configuration of a PPPoE client. 

vpdn enable

no vpdn logging

!

vpdn-group 1

 request-dialin

  protocol pppoe

!

interface Ethernet0

 ip address 192.168.100.1 255.255.255.0

 ip adjust-mss 1452

 ip nat inside

interface ATM0

 no ip address

 no atm ilmi-keepalive

 pvc 8/35

  pppoe client dial-pool-number 1

!

dsl operating-mode auto

hold-queue 224 in

!

interface Dialer1

ip address negotiated

ip mtu 1492

ip nat outside

encapsulation ppp

dialer pool 1

dialer-group 1

ppp authentication pap callin

ppp pap sent-username sohodyn password 7 141B1309000528

!

ip nat inside source list 101 interface Dialer1 overload

ip route 0.0.0.0.0.0.0.0 Dialer1

access-list 101 permit ip 192.168.100.0.0.0.0.255 any

Caveats

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels.

All caveats in Cisco IOS Release 12.1 and Cisco IOS Release 12.1 T are also in Release 12.1(5)YB5. For information on caveats in Cisco IOS Release 12.1, see Caveats for Cisco IOS Release 12.1. For information on caveats in Cisco IOS Release 12.1 T, see Caveats for Cisco IOS Release 12.1 T, which lists severity 1 and 2 caveats and is located on CCO and the Documentation CD-ROM.

Note If you have an account with Cisco.com, you can also use the Bug Toolkit to find select caveats of any severity. To reach the Bug Toolkit, log in toCisco.com and click Service & Support: Technical Assistance Center: Tool Index: Bug Toolkit. Another option is to go to http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl. 

Resolved Caveats - Release 12.1(5)YB5

This section describes unexpected behavior that is fixed in Release 12.1(5)YB5.

Management

CSCdw65903

An error can occur with management protocol processing. Please use the following URL for further information:

http://www.cisco.com/pcgi-bin/bugtool/onebug.pl?bugid=CSCdw65903 

Caveats for Release 12.1(5)YB3

This section describes possibly unexpected behavior by software releases prior to Release 12.1(5)YB3 that have been resolved in Release 12.1(5)YB3 and above as well as possibly unexpected behavior that might occur in Release 12.1(5)YB3.

Resolved Caveats - Release 12.1(5)YB3

This section describes possibly unexpected behavior by software releases prior to Release 12.1(5)YB3 that have been resolved in Release 12.1(5)YB3 and above.

CSCds92106

A Cisco router might halt after repeated power cycling due to the TI DSP booting up incorrectly under some conditions. This problem is fixed in Cisco IOS Software Release 12.1(5)YB3.

CSCdt77246

When a router is configured for PPPoE and IP NAT, and an incoming packet does not contain an MSS field or its TCP option field is not terminated by 0, the router might stop routing packets.

CSCdu19022

A router might unexpectedly reset if you remove the IP address from an interface while the interface is still attached to the encryption map. This problem is fixed in Cisco IOS Software Release 12.1(5)YB3.

Unresolved Caveats - Release 12.1(5)YB3

This section describes possibly unexpected behavior by Release 12.1(5)YB3.

CSCdu21252

If you shut down an ATM interface in a Cisco router that is configured with VPDN enabled for the PPPoE client, the router might unexpectedly reset.

Resolved Caveats - Release 12.1(5)YB1

This section describes possibly unexpected behavior by software releases prior to Release 12.1(5)YB1 that have been resolved in Release 12.1(5)YB1 and above.

CSCdt19816

A router retrains when an LOM is detected—a critical condition message is sent out, resulting in an unnecessary reboot. A LOM alone is not sufficient to require a critical condition message or router reset. This problem is fixed in Cisco IOS Software Release 12.1(5)YB1.

Related Documentation

The following sections describe the documentation available for the Cisco SOHO series routers. Typically, 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, except for feature modules, which are available online on Cisco.com and the Documentation CD-ROM.

Use these release notes with the documents listed in the following sections:

•Release-Specific Documents

•Platform-Specific Documents

•Feature Modules

•Cisco IOS Software Documentation Set

Release-Specific Documents

The following documents are specific to Release 12.1. They are located on Cisco.com and the Documentation CD-ROM.

•Release Notes for Cisco IOS Release 12.1

On Cisco.com at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes

•Product bulletins, field notices, and other release-specific documents on Cisco.com at:

Technical Documents: Product Bulletins

•Caveats for Cisco IOS Release 12.1 and 12.1 T 

As a supplement to the caveats listed in the "Caveats" section section in these release notes, see the Caveats for Cisco IOS Release 12.1 and Caveats for Cisco IOS Release 12.1 T  documents, which contain caveats applicable to all platforms for all maintenance releases of Cisco IOS Releases 12.1 and 12.1 T.

On Cisco.com at:

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

On the Documentation CD-ROM at:

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

Note If you have an account with Cisco.com, you can also use the Bug Toolkit to find select caveats of any severity. To reach the Bug Toolkit, log in toCisco.com and click Service & Support: Technical Assistance Center: Tool Index: Bug Toolkit. Another option is to go to http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl. 

Platform-Specific Documents

These documents are available for the Cisco SOHO series routers on Cisco.com and the Documentation CD-ROM:

•Cisco SOHO Series - Release Notes for Release 12.1(5)YB

•Configuration Note for Cisco SOHO Series Routers

•Regulatory Compliance and Safety Information for Cisco SOHO 76 and 77 Routers

On Cisco.com at:

Technical Documents: Documentation Home Page: Access Servers and Access Routers: Fixed Configuration Access Routers: Cisco SOHO Series Routers

On the Documentation CD-ROM at:

Cisco Product Documentation: Access Servers and Access Routers: Fixed Configuration Access Routers: Cisco SOHO Series Routers

Feature Modules

Feature modules describe new features supported by Release 12.1(5)YB5 and are updates 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 only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set.

On Cisco.com at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation: New Features in 12.1-Based Limited Lifetime Releases: New Features in 12.1X Releases

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation: New Features in 12.1-Based Limited Lifetime Releases: New Features in 12.1X Releases

Feature Navigator

Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a particular set of features and which features are supported in a particular Cisco IOS image. Feature Navigator is available 24 hours a day, 7 days a week.

To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, e-mail the Contact Database Administration group at cdbadmin@cisco.com. If you do not have an account on Cisco.com, go to http://www.cisco.com/register and follow the directions to set up an account.

To use Feature Navigator, you must have a JavaScript-enabled web browser such as Netscape 3.0 or later, or Internet Explorer 4.0 or later. Internet Explorer 4.0 always has JavaScript enabled. To enable JavaScript for Netscape 3.x or Netscape 4.x, follow the instructions provided with the web browser. For JavaScript support and enabling instructions for other browsers, check with the browser vendor.

Feature Navigator is updated when major Cisco IOS software releases and technology releases occur. You can access Feature Navigator at the following URL:

http://www.cisco.com/go/fn 

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 printed versions.

Documentation Modules

Each module in the Cisco IOS documentation set consists of two types of books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, Cisco IOS software functionality, and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference.

The Cisco IOS software documentation set is available on Cisco.com and on the Documentation CD-ROM.

On Cisco.com 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 at:

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

Release 12.1 Documentation Set

Table 4 describes the contents of the Cisco IOS Release 12.1 software documentation set, which is available in both electronic and printed form.

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

On Cisco.com 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 4 Cisco IOS Software 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
Cisco IOS File Management
Cisco IOS System Management
Cisco IOS User Interfaces Commands
Cisco IOS File Management Commands
Cisco IOS System Management Commands

•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

Using Cisco IOS Software
Overview of SNA Internetworking
Bridging
IBM Networking

•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
Interworking 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 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

Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS 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
Other Security Features

•Cisco IOS Switching Services Configuration Guide

•Cisco IOS Switching Services Command Reference

Cisco IOS Switching Services Overview
Cisco IOS Switching Paths
Cisco Eress Forwarding
NetFlow Switching
Multiprotocol Label Switching
Multilayer Switching
Multicast Distributed Switching
Virtual LANs
LAN Emulation

•Cisco IOS Wide-Area Networking Configuration Guide

•Cisco IOS Wide-Area Networking Command Reference

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

•Cisco IOS Configuration Guide Master Index

•Cisco IOS Command Reference Master Index

•Cisco IOS Debug Command Reference

•Cisco IOS Dial Services Quick Configuration Guide

•Cisco IOS Software System Error Messages

•New Features in 12.1-Based Limited Lifetime Releases

•New Features in Release 12.1 T

•Release Notes (Release note and caveat documentation for 12.1-based releases and various platforms)

 


Obtaining Documentation

The following sections provide sources for obtaining documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following sites:

•http://www.cisco.com

•http://www-china.cisco.com

•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 and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

•Registered Cisco Direct Customers can order Cisco Product documentation from the Networking Products MarketPlace:

http://www.cisco.com/public/ordsum.html

•Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:

http://www.cisco.com/go/subscription

•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, in North America, by calling 800 553-NETS(6387).

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 your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.

Cisco.com

Cisco.com 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.

Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, 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 Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.

To access Cisco.com, go to the following website:

http://www.cisco.com

Technical Assistance Center

The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.

Contacting TAC by Using the Cisco TAC Website

If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:

http://www.cisco.com/tac

P3 and P4 level problems are defined as follows:

•P3—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.

•P4—You need information or assistance on Cisco product capabilities, product installation, or basic product configuration.

In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.

To register for Cisco.com, go to the following website:

http://www.cisco.com/register/

If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:

http://www.cisco.com/tac/caseopen

Contacting TAC by Telephone

If you have a priority level 1(P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

P1 and P2 level problems are defined as follows:

•P1—Your production network is down, causing a critical impact to business operations if service is not restored quickly. No workaround is available.

•P2—Your production network is severely degraded, affecting significant aspects of your business operations. No workaround is available.