Table Of Contents
Cisco 826, Cisco 827, and Cisco 827-4V Routers
Determining the Software Version
Upgrading to a New Software Release
New Features in Release 12.2(4)XM
Class-Based Traffic Shaping to Support Low Latency Queueing
Dial-On-Demand Routing for PPPoE Client
New Software Features in Release 12.2 T
Configuring the DDR for PPPoE Client Feature
Configuring PPPoE on a Cisco 806 Router
dsl enable-training-log Command
Resolved Caveats - Release 12.2(4)XM4
Resolved Caveats - Release 12.2(4)XM3
Open Caveats - Release 12.2(4)XM3
Resolved Caveats - Release 12.2(4)XM2
Resolved Caveats - Release 12.2(4)XM1
Open Caveats - Release 12.2(4)XM
Cisco 800 Series and SOHO 77 Routers
Cisco IOS Software Documentation Set
Release 12.2 Documentation Set
Obtaining Technical Assistance
Contacting TAC by Using the Cisco TAC Website
Release Notes for the SOHO 70 Series Routers and the Cisco 800 Series Routers for Cisco IOS Release 12.2(4)XM
June 25, 2002
These release notes for the SOHO 70 Series Routers and Cisco 800 Series Routers describe the enhancements provided in Cisco IOS Release 12.2(4)XM4. These release notes are updated as needed. Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.2 T located on Cisco.com and the Documentation CD.
For a list of the software caveats that apply to Cisco IOS Release 12.2(4)XM4, see the Caveats for
Cisco IOS Release 12.2 T. The caveats document is updated for every maintenance release and is located on Cisco.com and the Documentation CD.Contents
These release notes discuss the following topics:
•Obtaining Technical Assistance
System Requirements
This section describes the system requirements for Release 12.2(4)XM4 and includes the following sections:
•Determining the Software Version
Memory Requirements
Table 1 and Table 2 provide the memory requirements for the Cisco IOS feature sets supported by Cisco IOS Release 12.2(4)XM4 on the SOHO 70 Series Routers and Cisco 800 Series Routers.
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Hardware Supported
Cisco IOS Release 12.2(4)XM4 supports the following Cisco routers:
•SOHO 70 series routers:
•Cisco 820 series routers:
–Cisco 826 Routers
–Cisco 827 Routers
–Cisco 827-V Routers
For detailed descriptions of new hardware features and which features are supported on each router, see the "New and Changed Information" section.
SOHO 77 Routers
The SOHO 77 router provides the following key hardware features:
•Connection to an ADSL network through an asymmetric digital subscriber line (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.
Table 3 summarizes Cisco SOHO 77 router ports.
Table 3 Supported Interfaces for the SOHO 77 Routers
Router Ethernet Ports ADSL Ports Console PortsSOHO 77
One 10BaseT (RJ-45)
RJ-11
RJ-45
SOHO 78 Routers
The SOHO 78 router provides the following key hardware features:
•Connection to a G.SHDSL network through a G.SHDSL 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.
Table 4 summarizes Cisco SOHO 78 router ports.
Table 4 Supported Interfaces for the SOHO 78 Routers
Router Ethernet Ports G.SHDSL Ports Console PortsSOHO 78
One 10BaseT (RJ-45)
RJ-11
RJ-45
Cisco 806 Routers
Cisco 806 routers provide the following key hardware features:
•Provide connection to 10BaseT (10-Mbps) Ethernet networks and is compatible with 10/100-Mbps devices.
•Flash memory: The Cisco IOS uses the current default of 8 MB for loading Cisco IOS images.
•Webflash: 2 MB of Flash memory reserved for use by the Cisco Router Web Setup software.
•Cisco 806 Router Dynamic RAM: Default is 12 MB of DRAM and is expandable to 32 MB, using 4-MB, 8-MB, and 16-MB DIMM cards.
•The central processing unit is a 50 MHz MPC 855T RISC processor.
•Support Cisco IOS software.
•Color-coded ports and cable reduce the chance of cabling errors.
•Ability to be stacked or mounted on a wall.
•Accept a cable lock for physically securing the router.
•The routers provide locking power connectors and a Kensington-compatible locking slot.
Table 5 summarizes Cisco 806 router ports.
Cisco 826, Cisco 827, and Cisco 827-4V Routers
The Cisco 826, Cisco 827, and Cisco 827-4V Series Routers provide the following key hardware features:
•The routers provide connection to an ADSL network or telephones and fax machines through an ADSL port.
•Flash memory: Default is 12 MB and is expandable to 20 MB. If 12 MB is Flash is installed, 8 MB is used for the Cisco IOS images and 4 MB hosts the ROMMON and NVRAM. Additional memory can be added using Flash cards.
•Cisco 826 and Cisco 827 routers Dynamic RAM: Default is 16 MB of DRAM and is expandable to 32 MB.
•Cisco 827-4V router Dynamic RAM: Default is 24 MB and is expandable to 32 MB. The Cisco 827-4V router also contains an 8-MB DIMM card.
•The central processing unit is a 50 MHz MPC 855T RISC processor.
•Color-coded ports and cable reduce the chance of cabling errors.
•Ability to be stacked or mounted on a wall.
•The routers provide locking power connectors and a Kensington-compatible locking slot.
Table 6 lists the supported interfaces for the Cisco 826, Cisco 827, and Cisco 827-4V routers.
Cisco 828 Routers
Cisco 828 routers provide the following key hardware features:
•Provide connection to 10BaseT (10-Mbps) Ethernet networks and is compatible with 10/100-Mbps devices.
•Provide connection to G.991.2 (digital-encoding standard) symmetrical high-speed digital subscriber line (G.SHDSL) networks.
•Flash memory: The Cisco IOS uses the current default of 8 MB for loading Cisco IOS images, upgradable to 16 MB.
•Webflash: 2 MB of Flash memory reserved for use by the Cisco Router Web Setup software.
•Dynamic RAM: Default is 16 MB of DRAM and is expandable to 32 MB, using 4-MB, 8-MB, and 16-MB DIMM cards.
•The central processing unit is a 50 MHz MPC 855T RISC processor.
•Support Cisco IOS software.
•Color-coded ports and cables, which reduce the chance of cabling errors.
•Ability to be stacked or mounted on a wall.
•Accept a cable lock for physically securing the routers.
•Provide locking power connectors.
Table 7 summarizes Cisco 828 router ports.
Determining the Software Version
To determine the version of Cisco IOS software running on your Cisco router, log in to the router and enter the show version EXEC command. The following sample displays command output from a Cisco 806 router running Release 12.2(4)XM4:
Router> show versionCisco Internetwork Operating System SoftwareIOS (tm) 12.2 Software (c806-y6-mz), Version 12.2(4)XM4, RELEASE SOFTWAREUpgrading to a New Software Release
For general information about upgrading to a new software release, see
Technical Support for 800 Series Routers.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 12.2(4)XM4 supports the same feature sets as Releases 12.2 T, but Release 12.2(4)XM4 can include new features supported by the SOHO 70 Series Routers and Cisco 800 Series Routers.
Table 8 through Table 11 list the features and feature sets supported in Cisco IOS Release 12.2(4)XM4:
•Table 8—SOHO 77 and SOHO 78 routers
•Table 9—Cisco 806 routers
•Table 10—Cisco 826 and 827 routers
•Table 11—Cisco 828 routers
The tables use the following conventions:
•Yes—The feature is supported in the software image.
•No—The feature is not supported in the software image.
•In—The number in the "In" column indicates the Cisco IOS release in which the feature was introduced. For example, "Release 12.2(4)XM4" means the feature was introduced in Release 12.2(4)XM4. If a cell in this column is empty, the feature was included in a previous release or the initial base release.
Note These feature set tables only contain a selected list of features. These tables are not cumulative—nor do they list all the features in each image.
New and Changed Information
The following sections list the new software features supported by routers for Release 12.2(4)XM4 and above:
New Features in Release 12.2(4)XM
The following sections list the new software features supported by Cisco IOS Release 12.2(4)XM4 on the SOHO 70 Series Routers and the Cisco 800 Series Routers.
Committed Access Rate
Release 12.2(4)XM4 adds support for committed access rate (CAR) to limit bandwidth transmission rates to traffic sources and destinations. The CAR feature also specifies policies for handling traffic that breaches the specified bandwidth allocations. To enable CAR, enter the command rate-limit in ATM-interface-configuration mode. Additional feature configuration instructions and examples are available in the Software Enhancements for the Cisco 800 Routers and SOHO Routers publication.
Class-Based Traffic Shaping to Support Low Latency Queueing
Class-Based Traffic Shaping (CBTS) is a feature for controlling traffic that is exiting the Ethernet 1 (WAN) interface, to match the interface-transmission speed to the speed of the attached broadband modem or to the remote target interface. CBTS ensures that traffic conforms to proper policies, to eliminate bottlenecks in topologies with data-rate mismatches.
Dial-On-Demand Routing for PPPoE Client
The dial-on-demand routing (DDR) for PPPoE client feature provides flexibility for those subscribers whose ISP charges based on the amount of time they are connected to the network (non-flat rate services). With this feature, you can designate a type of traffic as interesting traffic, and configure the router to bring up the PPPoE connection when interesting traffic arrives from the LAN interface and to bring down the connection when the dialer idle timer expires.
Low Latency Queueing
Low Latency Queueing (LLQ) provides a low-latency, strict-priority transmit queue for voice over IP (VoIP) traffic. Strict priority queueing allows delay-sensitive data such as voice to be dequeued and sent first (before packets in other queues are dequeued), giving delay-sensitive data preferential treatment over other traffic. Refer to Software Enhancements for the Cisco 800 Routers and SOHO Routers for more information on this feature.
Weighted Fair Queuing
Weighted Fair Queuing (WFQ) enables slow-speed links, such as serial links, to provide fair treatment for all types of traffic. The WFQ feature classifies traffic into different flows (also called conversations), based on layer-three and layer-four information, such as IP addresses and TCP ports. The WFQ feature does not require you to define access lists; this means low-bandwith traffic has priority over high-bandwith traffic because high-bandwidth traffic shares the transmission media in proportion to its assigned weight.
The WFQ feature has certain limitations: it is not scalable if the flow amount increases considerably and native WFQ is not available on high-speed interfaces, such as ATM interfaces. The feature Class-Based WFQ, available on Plus images, overcomes these limitations.
New Software Features in Release 12.2 T
For information regarding the features supported in Cisco IOS Release 12.2 T, refer to the Cross-Platform Release Notes and New Feature Documentation links at the following location on Cisco.com and the Documentation CD-ROM:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/index.htm
This URL is subject to change without notice. If it changes, point your web browser to Cisco.com, and click on the following path:
Service & Support: Technical Documents: Release 12.2 (from the Cisco IOS Software drop-down list)
Important Notes
The following sections contain important notes about Cisco IOS Release 12.2(4)XM4 that can apply to SOHO 70 and Cisco 800 series routers. (Also, see the "Caveats" section.)
Configuring the DDR for PPPoE Client Feature
To configure the DDR for PPPoE client feature, use the following command:
pppoe-client dial-pool-number number [dial-on-demand]
The feature is disabled by default. The following commands must also be configured for the dialer interface to support the DDR for PPPoE client feature:
dialer-group dialer-groupdialer idle-timeout dialer idle-timeoutdialer hold-queue dialer hold-queueAdditionally, the following command must be configured in global command mode:
dialer-list dialer-list protocol ip [deny | list | permit]Here is a PPPoE client configuration example:
!vpdn enableno vpdn logging!vpdn-group 1request-dialinprotocol pppoe!interface Ethernet1pppoe enablepppoe-client dial-pool-number 1!interface Dialer1ip address negotiatedip mtu 1492encapsulation pppdialer pool 1dialer idle-timeout 180 eitherdialer hold-queue 100dialer-group 1!dialer-list 1 protocol ip permit!ip route 0.0.0.0 0.0.0.0 Dialer1Configuring PPPoE on a Cisco 806 Router
When specifying the method of authentication while configuring PPPoE and connecting to a Service Provider, the argument optional might be required to successfully authenticate the connection. For example:
interface Dialer0ppp authentication pap optionalor
interface Dialer0ppp authentication chap optionaldsl enable-training-log Command
In previous releases, a DSL training log was retrieved by default each time a Cisco router established contact with a DSLAM. The training log is a record of the events that occur when the router trains or negotiates communication parameters with the DSLAM at the central office.
Retrieving this log adds time to the training process and is not always necessary after a router has successfully trained. Therefore, the Cisco IOS 12.2(4)XM images now disable the retrieval of the training log by default.
To retrieve the log, enter the command dsl enable-training-log. The no form of this command disables the retrieval of the DSL training log. The caveat number associated with this modification is CSCdw18903. For instructions on how to use the command dsl enable-training-log, refer to the online document Software Enhancements for the Cisco 800 Routers and SOHO Routers.
Globespan R1.5 Firmware
When using Release 12.2(4)XM4, you must use firmware version R1.5 for G.SHDSL chip sets. Firmware version R1.5 is an upgrade from R1.0, with better performance and a more reliable rate adaptation training capability. The R1.5 firmware release is compliant with the ITU-T G.991.2 standard and backward-compatible with releases R1.0 and R1.35, which were released by Cisco DSLAMs with 8xG.SHDSL cards.
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.
Caveats in Cisco IOS Releases 12.2 and 12.2 T are also in Cisco IOS Release 12.2(4)XM4. For information on caveats in Cisco IOS Release 12.2, see Caveats for Cisco IOS Release 12.2. For information on caveats in Cisco IOS Release 12.2 T, see Caveats for Cisco IOS Release 12.2 T. These two documents list severity 1 and 2 caveats and are 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/cgi-bin/Support/Bugtool/launch_bugtool.pl.
Resolved Caveats - Release 12.2(4)XM4
This section describes unexpected behavior that is fixed in Release 12.2(4)XM4.
CSCdx36052
The following Alcatel DSLAM has been tested with the c828/SOHO78 and is supported:
Alcatel 7300 with the G.SHDSL linecard. DSLAM:
Firmware: GWNAAA4.118
Software:4.1.31The supported EOC messages are:
11 - Status Request
12 - Full Status Request
140 - Performance Status SHDSL Network Side
144 - Generic Unable To Comply (UTC)
129 - Discovery Response
130 - Inventory Response
131 - Configuration Response - SHDSLCSCdx17233
A Cisco router running Simple Network Management Protocol (SNMP) might reload after a severe memory leak occurs.
CSCdv43559
If you use NAS for ASCII logins using a TACACS+ server that uses a TACACS+ status of GETDATA (3) to collect information, the login fails. The work around for this problem is to fail over to a backup authentication method.
CSCdv54349
Local AAA authentication might not function. To work around the problem, assign AAA to a remote server or install an earlier Cisco IOS software release.
CSCdv27836
If you enter Return without any other characters when you are prompted for a username, a Cisco router enters an infinite loop, repeatedly prompting for a username. If a hostile user repeatedly enters Return without any other characters, eventually the router unexpectedly resets. This problem occurs for Exec logins and includes Telnets.
There is no workaround for direct console access. In this case an attacker also has a physical access to the router, so other attacks are possible. If you are using Telnet to connect to the device, a workaround is to use SSH instead of Telnet, to allow Telnet access only from authorized hosts. If you are using a remote console via terminal server to access the Cisco router, a workaround is to use SSH to access the terminal server and then Telnet to the Cisco router port, to allow Telnet access from authorized hosts only.
CSCdx11089
When using Telnet and a CS UNIX TACACS+ server to access a router with TACACS+ user authentication, you cannot activate the "Change password sequence."
CSCdx19222
The RTR Timeout resets on reload.
CSCdx22635
A Cisco router can run out of memory if the command snmp get-many is entered. The bug is in the MMI code. The MMI subsystem is now removed to avoid this memory-leak problem.
CSCdw35930
The command aaa authentication attempts login n appears in a configuration if the command tacacs-server attempts n is also present in the configuration. Changes to either command are reflected in the other. The number of attempts granted is actually one less than the number configured. The workaround is to configure an additional attempt.
Resolved Caveats - Release 12.2(4)XM3
This section describes unexpected behavior that is fixed in Release 12.2(4)XM3.
CSCdw54337
A Cisco 806 router might reload with a SegV Exception at PC 0x8026D074.
CSCdw61794
A PPPoE call made through a Cisco 806 router might fail. If the command debug ppp negotiation is enabled during the time of the failure, the following error message is displayed:
Vi1 UNKNOWN(0xBADD): LCP not open, discarding packetA workaround is to enter the command no ip cef in the global configuration mode to disable cef.
Open Caveats - Release 12.2(4)XM3
This section describes possibly unexpected behavior by Release 12.2(2)XK3.
Miscellaneous
CSCin00238
The last encryption map entry cannot be removed from the dialer interface even after the command no crypto map testtag is given in the global configuration mode. A workaround is to manually shut down the dialer interface and then remove the encryption map entry.
CSCdu00267
When running a firewall audit for TFTP, the TFTP data session responder log displays the number of bytes transferred incorrectly. Only logging functionality is affected, however, and the TFTP firewall audit feature operates correctly.
CSCdv73353
Fast switching is enabled by the configuration of the command ip cef. Packets cannot be Fast switched on Cisco SOHO 77 routers because Cisco SOHO 77 routers do not support the command ip cef.
CSCdv81134
If a Cisco 827 router is configured to inspect TFTP application traffic with audit trails turned on, the audit trail for TFTP displays an incorrect number of bytes transmitted for the tftp-data session.
CSCdv85349
The use of PPTP functionality on a Cisco 806 router causes the router to unexpectedly reload. Although PPTP termination commands can be entered on a Cisco 806 router, Cisco 806 routers only supports PPTP passthrough and do not support the PPTP termination feature.
CSCdw30110
The encryption process on a Cisco 806 router remains in pending status even after an Entrust CA server grants a digital certificate.
Resolved Caveats - Release 12.2(4)XM2
This section describes unexpected behavior that is fixed in Release 12.2(4)XM2.
Management
CSCdw65903
An error can occur with management protocol processing. Please use the following URL for further information:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Resolved Caveats - Release 12.2(4)XM1
This section describes unexpected behavior that is fixed in Release 12.2(4)XM1.
Management
CSCdv65027
The command-line interface (CLI) does not prompt for the erase keyword when the copy [ /erase] source-url destination-url EXEC command is entered. This behavior does not allow a file system to be erased using the copy [ /erase] source-url destination-url EXEC command. To work around this problem, enter the erase filesystem: command before entering the copy EXEC command.CSCdu86498
When AAA Authentication is enabled and default group RADIUS is configured, you are prompted for a user-name and password. Previous Cisco IOS releases only prompted you for "enable password." To work around this problem, enter any character(s) at the user-name prompt and then enter the enable password.
Open Caveats - Release 12.2(4)XM
This section describes possibly unexpected behavior by Release 12.2(4)XM. Only severity 1 through 3 caveats are included.
CSCdw21031
Due to CRC errors, when a VC bundle is enabled some packets are dropped on the output queue of a Cisco 826 router ATM interface.
CSCdw22299
Incoming packets are process switched when a generic routing encapsulation (GRE) tunnel is used over a PPPoA or PPPoE connection.
CSCdw30110
A Cisco 806 router encryption process remains in pending status after an Entrust CA server is granted a digital certificate.
Related Documentation
The following sections describe the documentation available for the SOHO 70 and Cisco 800 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 and the Cisco IOS release notes, which are available online on Cisco.com and the Documentation CD-ROM.
Use these release notes with the documents listed in the following sections:
•Cisco IOS Software Documentation Set
Release-Specific Documents
The following documents are specific to Release 12.2 and apply to Release 12.2(4)XM4. They are located on Cisco.com and the Documentation CD-ROM (under the heading Service & Support):
•To reach the Release Notes for the Cisco 800 Series Routers for Cisco IOS Release 12.2, click this path:
Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cisco IOS Release 12.2T
•To reach the Cross-Platform Release Notes for Cisco IOS Release 12.2 T, click this path:
Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cisco IOS Release 12.2 T
•To reach product bulletins, field notices, and other release-specific documents, click this path:
Technical Documents: Product Bulletins
•The Caveats for Cisco IOS Release 12.2 and Caveats for Cisco IOS Release 12.2 T documents contain caveats applicable to all platforms for all maintenance releases of Release 12.2. To reach the caveats documents, click this path:
Technical Documents: Cisco IOS Software: Release 12.2: 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/cgi-bin/Support/Bugtool/launch_bugtool.pl.
Platform-Specific Documents
Hardware installation guides, configuration and command reference guides, and additional documents are available for the SOHO 70 and Cisco 800 series routers on Cisco.com and the Documentation CD-ROM.
Cisco 800 Series and SOHO 77 Routers
Documents specific to the Cisco 800 series and SOHO 77 routers are on Cisco.com and the Documentation CD-ROM:
Technical Documents: Documentation Home Page: Access Servers and Access Routers: Fixed Configuration Access Routers: <platform_name>
Software Configuration
The document Cisco Router Web Setup User Guide is available for the Cisco 800 series and SOHO 77 routers on Cisco.com and the Documentation CD-ROM at:
Technical Documents: Router Configuration Tools: Cisco Router Web Setup
Feature Modules
Feature modules describe new features supported by Release 12.2 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.
To reach the Release 12.2 feature modules from Cisco.com Documentation CD-ROM, click this path (under the heading Service & Support):
Technical Documents: Cisco IOS Software: Release 12.2: New Feature Documentation:
New Features in 12.2-Based Limited Lifetime Releases: New Features in 12.2X ReleasesFeature 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. The Cisco IOS software documentation set is 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 one or more configuration guides and one or more corresponding command references. 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. 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 (under the heading Service & Support) at:
Technical Documents: Cisco IOS Software: Release 12.2: Configuration Guides and Command References
Release 12.2 Documentation Set
Table 12 lists the contents of the Cisco IOS Release 12.2 software documentation set, which is available in both electronic and printed form (under the heading Service & Support) on Cisco.com and on the Documentation CD-ROM:
Technical Documents: Cisco IOS Software: Release 12.2
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.
Obtaining Documentation
The following sections provide sources for obtaining documentation from Cisco Systems.
World Wide Web
The most current Cisco documentation is available on the World Wide Web at http://www.cisco.com. Translated documentation can be accessed at http://www.cisco.com/public/countries_languages.shtml.
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 might 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/cgi-bin/order/order_root.pl
•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 products 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.
For your convenience, many documents contain a response card behind the front cover for submitting your comments by mail. Otherwise, you can mail your comments to the following address:
Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
The following sections provide sources for obtaining technical assistance from Cisco Systems.
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/
Cisco.com registered users who cannot resolve a technical issue by using the TAC online resource 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.