Table Of Contents
Release Notes for Cisco IOS Release 12.2(4)YH on the Cisco ICS 7750
May 28, 2002
These release notes describe features and functionality of Cisco IOS Release 12.2(4)YH that are supported on analog station interface (ASI) cards and multiservice route processor (MRP) cards in the Cisco Integrated Communications System (ICS) 7750, including the new MRP300, MRP3-8FXS, and MRP3-16FXS cards which feature onboard flash memory.
Caution Software upgrades for the Cisco ICS 7750 are delivered in packaged system software bundles that are distributed on Cisco.com and/or on CD-ROM. Each Cisco ICS 7750 system software bundle is certified with a specific Cisco IOS release. Appropriate consideration must be given to the other software in the bundle when installing Cisco IOS software in the Cisco ICS 7750. Contact your sales representative for ordering instructions.
These release notes are updated as needed to describe new memory requirements, new features, new hardware support, software platform deferrals, microcode changes, related document changes, and any other important changes. Use these release notes with the Cross-Platform Release Notes for Cisco IOS 12.2T located on CCO and the Documentation CD-ROM.
These release notes discuss the following topics:
This section describes the system requirements for Release 12.2(4)YH on the Cisco ICS 7750. It includes the following sections:
Table 1 describes the memory requirements for the Cisco IOS feature sets supported by Cisco IOS Release 12.2(4)YH on ASIs and MRPs in a Cisco ICS 7750 chassis.
Table 1 Available Software Images and Memory Requirements for ASIs and MRPs
Platform Image Name Image Software Bundles 1 Required Flash Memory for the MRP300, MRP3-8FXS, MRP3-16FXS Required Flash Memory for the MRP200, ASI81, ASI160 2 Required DRAM Memory 3 Runs From
Cisco ICS 7750
IP/IPX/AT/IBM/ Voice, Plus
1 In addition to the Cisco IOS software listed above, each software bundle contains the following software: Cisco IOS software for the system switch processor (SSP) card, ICS System Manager, ICS Core Software, and system alarm processor (SAP) software. The x.x.x in the system software bundle name represents the release number. For example, for release 2.3.0, the name of the bundle containing the IP/Voice Plus image would be S77a-2.3.0.
2 Flash memory is not used for the Cisco IOS image on ASIs and MRP200s. Since onboard flash is not available on ASIs and MRP200s, a Cisco IOS compressed image resides on the system processing engine (SPE) and is downloaded to the RAM of each ASI or MRP200 before image decompression.
3 You can upgrade ASI or MRP card memory to 80 MB, 96 MB, or 128MB by installing a dual in-line memory module (DIMM) in the card DIMM slot. For memory upgrade instructions, refer to Installing Memory, PVDM, and VPN Modules in ASI Cards, MRP Cards, and SPE Cards in the Cisco ICS 7750.
Cisco IOS Release 12.2(4)YH supports ASIs and MRPs in a Cisco ICS 7750. See Table 2 for a description of the processor cards which are supported in the Cisco ICS 7750.
Table 2 lists the processor cards in the Cisco ICS 7750.
Table 2 Cisco ICS 7750 Processor Cards
Card Card Description Port Description
A single-board computer that runs system software applications such as ICS System Manager and Cisco CallManager.
•SPE2001 : No front-panel ports.
•SPE310: Front-panel ports for video, keyboard, and universal serial bus (USB).
A voice-and-data-capable router that can carry voice traffic over an IP network and can link remote Ethernet LANs to central offices over WAN links. The multiservice route processor has two slots that support combinations of WAN interface cards (WICs), voice WAN interface cards (VWICs), and Voice interface cards (VICs). It also has two slots to support Packet Voice Data modules (PVDMs). Five versions of PVDMs are available. The MRP 300 has onboard flash memory.
Supports the data and voice interface port types listed in Table 5.
A voice-and-data-capable router that can carry voice traffic over an IP network and can link small-to- medium-size remote Ethernet LANs to central offices over WAN links (depending on the type of card installed in its WIC/VIC/VWIC slot) and can support connections to analog telephones, fax machines, and polycoms. It also has two PVDM slots. The MRP3-8FXS has onboard flash memory.
•Eight FXS ports
•One slot that supports the data and voice interface port types listed in Table 5
An analog gateway that supports connections to telephones, fax machines, and polycoms. It also has two PVDM slots. The MRP3-16FXS has onboard flash memory.
Sixteen FXS ports
System alarm processor (SAP)
A module that monitors the status of the chassis, power supply modules, and fans, and feeds real-time data to the system processing engines. The SAP card delivers its data to the SPE running System Manager.
•Two COM ports
•One console port
System switch processor (SSP)
An Ethernet switch that passes data between all system cards and to any other Ethernet switches connected to the system.
Two Ethernet 10/100 ports
1 System software release 2.1.0 or later is supported only on SPE 310s.
Table 3 lists the number of processor cards supported by a Cisco ICS 7750.
Table 3 Number of Cards Supported in a Cisco ICS 7750 Chassis
Card Minimum Required Maximum Allowed
200W power supply module
MRP and ASI Card Upgrades
You can upgrade MRP and ASI cards as follows:
•Memory. MRP and ASI cards ship with 64 MB of dynamic RAM (DRAM). You can upgrade MRP and ASI card memory to 80 MB, 96, or 128 MB by installing a dual in-line memory module (DIMM) in the card DIMM slot.
•Voice and data processing power. VICs, VWICs, and FXS modules installed in MRP or ASI cards might require additional digital signal processors (DSPs) for processing heavier volumes of voice traffic. You can install Packet Voice/Data Modules (PVDMs) in one or both of the card PVDM slots to give MRP and ASI cards more processing power.
Table 4 provides information about the modules that you can install in ASI and MRP cards
Table 4 Cisco ASI and MRP Card Replacement DIMMs and PVDMs
Description Cisco Part Number
16-MB SDRAM DIMM
32-MB SDRAM DIMM
64-MB SDRAM DIMM
4-channel packet voice/fax data DSP module
8-channel packet voice/fax data DSP module
12-channel packet voice/fax data DSP module
16-channel packet voice/fax data DSP module
20-channel packet voice/fax data DSP module
1 The PVDM-256K-16 is the recommended DSP module for ASI cards. Refer to the "PVDM Requirements" appendix in the Cisco ICS 7750 Hardware Installation Guide.
Wide Area Network Interface Cards, Voice Interface Cards, and Voice WAN Interface Cards
Table 5 lists the WICs, VICs, and VWICs that you can order in Cisco ICS 7750 MRP and ASI 81 cards. Refer to the Cisco ICS 7750 Software Configuration Guide and the ICS System Manager online help for configuration instructions.
Table 5 Supported WICs, VICs and VWICs
Card Description Abbreviated Name
1-port serial, asynchronous and synchronous (T1/E1)
2-port serial, asynchronous and synchronous (T1/E1)
2-port serial, low speed (up to 128 kbps), asynchronous and synchronous
1-port ISDN BRI with integrated NT1 (U interface)
1-port, four-wire 56-kbps CSU/DSU3
1-port, T1/fractional T1 CSU/DSU
2-port FXS4 voice/fax interface card
2-port FXO5 voice/fax interface card
2-port FXO voice/fax interface card with battery reversal detection and caller ID support (for the United States)
2-port FXO voice/fax interface card with battery reversal detection and caller ID support (for Europe)
2-port FXO voice/fax interface card with battery reversal detection (for Australia)
2-port E&M6 voice/fax interface card
2-port analog DID7 voice/fax interface card
4-port analog FXS/DID voice/fax interface card
2-port ISDN BRI voice/fax interface card (network and terminal side)
1-port T1/fractional T1 multiflex trunk with CSU/DSU
2-port T1/fractional T1 multiflex trunk with CSU/DSU
1-port E1/fractional E1 multiflex trunk with CSU/DSU
2-port E1/fractional E1 multiflex trunk with CSU/DSU
1 ISDN = Integrated Services Digital Network
2 BRI = Basic Rate Interface
3 CSU/DSU = channel services unit/data services unit
4 FXS = Foreign Exchange Station
5 FXO = Foreign Exchange Office
6 E&M = Ear and Mouth
7 DID = Direct Inward Dial
SPE Card Support
Release 2.1.0 or later is supported only on SPE 310s. The SPE 310 offers a keyboard port, a video port, and two universal serial bus (USB) ports supporting standard USB devices such as mice, keyboards, and CD-ROM drives.
The SPE 310 also features a 700-MHz Pentium III processor, a 20.4-GB hard disk drive, and 512 MB of onboard memory. You can upgrade SPE 310 memory to a maximum of 1536 MB by installing 256-MB or 512-MB dual in-line memory modules (DIMMs) in one or both of the SPE card DIMM slots.
For instructions on how to upgrade the memory on SPE 310 cards, refer to Installing Memory, PVDM, and VPN Modules in ASI Cards, MRP Cards, and SPE Cards in the Cisco ICS 7750.
Determining Your Software Release
Complete the following steps to determine the Cisco IOS software version running on Cisco ICS 7750 ASI, MRP, or SSP cards:
Step 1 On a PC, choose Start > Run.
Step 2 Enter the following command to open a Telnet session, where IP address is the IP address of the card that you wish to verify:telnet IP address
Step 3 Enter your login password.
Step 4 Enter the show version command:card> show version
The following is some of the output that is displayed after entering the command show version on an ASI or MRP card:router> show versionCisco Internetwork Operating System SoftwareIOS (tm) ICS7700 Software (ICS7700-SV3Y-M), Version 12.2(4)YH, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
Additional output lines from the show version command include information such as the processor revision numbers, amount of available memory, hardware IDs, and partition information.
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)YH supports the same feature sets as Releases 12.2 and 12.2T, but Release 12.2(4)YH can include new features supported by the Cisco ICS 7750 platform. Table 6 lists the feature sets supported by the Cisco ICS 7750.
Table 7 lists the features and feature sets supported by the Cisco ICS 7750 in Cisco IOS Release 12.2(4)YH. The table uses the following conventions:
•Yes—The feature is supported in the software image.
•No—The feature is not supported in the software image.
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. For additional information about new feature support, refer to the Release Notes for the Cisco ICS 7750 for System Software Release 2.x.x.
New and Changed Information
The following sections list the new hardware and software features supported by the Cisco ICS 7750 for Cisco IOS software Release 12.2(4)YH.
New Hardware Features in Release 12.2(4)YH
Cisco IOS Release 12.2(4)YH on the Cisco ICS 7750 supports the following flash-based router/gateway cards:
New Software Features in Release 12.2(4)YH
Cisco IOS Release 12.2(4)YH on the Cisco ICS 7750 supports the new software features described in this section.
Multicast Music-on-Hold Support
The multicast music-on-hold (MOH) feature enables you to subscribe to a music-streaming service when using an MRP or ASI as a Cisco IOS Media Gateway Control Protocol (MGCP) voice gateway. By means of a preconfigured multicast address on a gateway, the gateway can "listen for" Real-Time Transport Protocol (RTP) packets that are broadcast from a default router in the network and that can relay the packets to designated voice interfaces in the network.
RTP is the Internet-standard protocol for transporting real-time data, including audio and video information, across a network. Thus, RTP is well suited for media on demand and for interactive services such as IP telephony.
The default router in the network for handling MOH functions must have the following enabled:
•A multicast routing protocol, for example Protocol Independent Multicast (PIM) or Distance Vector Multicast Routing Protocol (DVMRP)
•An IP routing protocol, for example Routing Information Protocol (RIP) or Open Shortest Path First (OSPF)
When you configure a multicast address on a voice interface of a gateway, the gateway sends an Internet Gateway Management Protocol (IGMP) "join" message to the default router, indicating to the default router that the gateway is to receive RTP multicast packets.
Thus, the MOH feature provides the functionality to stream music from an MOH server to the voice interfaces of on-net and off-net callers that have been placed on hold.
The integrated multicast capability of Cisco CallManager 3.1 is implemented through the H.323 signaling plane in Cisco CallManager.
In an MOH environment, whenever caller A places caller B on hold, Cisco CallManager requests the MOH server to stream RTP packets to the "on-hold" interface through the preconfigured multicast address. In this way, RTP packets can be relayed to appropriately configured voice interfaces in a VoIP network that have been placed on hold.
Multiple MOH servers can be present in the same network, but each server must have a different Class D IP address, and the address must be preconfigured in Cisco CallManager and the Cisco IOS MGCP voice gateways.
Note For information about how to configure digital MGCP on the Cisco ICS 7750, refer to
Using Media Gateway Control Protocol with the Cisco ICS 7750.
MGCP Support for T1/E1 ISDN PRI
Cisco IOS Release 12.2(4)YH on the Cisco ICS 7750 adds support for Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) backhaul, for both T1 and E1 interfaces. PRI backhaul provides a method for transporting complete IP telephony signaling information from the ISDN PRI interface of an MRP or ASI to Cisco CallManager through a highly reliable TCP connection.
This feature works by terminating all the ISDN PRI Layer 2 (Q.921) signaling functions in the Cisco IOS code on the MGCP voice gateway (typically the MRP or ASI) while, at the same time, packaging all the ISDN PRI Layer 3 (Q.931) signaling information into packets for transmission to the Cisco CallManager through an IP tunnel over a highly reliable TCP connection. This methodology ensures the integrity of the Q.931 signaling information being passed through the network for managing IP telephony devices.
A rich set of user-side and network-side ISDN PRI calling functions is supported by the ISDN PRI backhaul feature. The gateway uses a single TCP connection for backhauling all the ISDN D channels to Cisco CallManager. The "SAP/Channel ID" parameter in the header of each message identifies individual D channels. In addition to carrying the backhaul traffic, the inherent TCP keepalive mechanism is also used to determine MGCP voice gateway connectivity to an available call agent.
The MGCP voice gateway also establishes a TCP link to the backup (secondary) Cisco CallManager server (typically an SPE). In the event of Cisco CallManager switchover, the ISDN PRI backhaul functions are assumed by the secondary Cisco CallManager server. During this switchover, all active ISDN PRI calls are preserved, and the affected MGCP gateway is registered with the new Cisco CallManager server through a Restart-in-Progress (RSIP) message to ensure continued gateway operation.
Note For information about how to configure ISDN PRI backhaul on the Cisco ICS 7750, refer to
Using Media Gateway Control Protocol with the Cisco ICS 7750.
MGCP Support for T1 CAS
Cisco IOS Release 12.2(4)YH on the Cisco ICS 7750 adds MGCP support for Channel Associated Signaling (CAS) for T1 interfaces.
Various types of CAS signaling are available for T1, including loop-start, ground-start, and recEive and transMit (E&M). CAS allows the device to provide the automatic number identification/dialed number identification service (ANI/DNIS) delimiter on incoming T1/CAS trunk lines. The digit collection logic in the call switching module (CSM) for incoming T1 CAS calls in dual tone multifrequency (DTMF) is modified to process the delimiters, the ANI digits, and the DNIS digits.
As part of the configuration, a CAS signaling class with the template to process ANI/DNIS delimiters has to be defined. This creates a signaling class structure which can be referred to by its name.
This feature is only functional in a T1 CAS configured for E&M-feature group b (wink start). E&M signaling is typically used for trunks. It is normally the only way that a central office (CO) switch can provide two-way dialing with direct inward dialing. In all the E&M protocols, off-hook is indicated by A=B=1, and on-hook is indicated by A=B=0. If dial pulse dialing is used, the A and B bits are pulsed to indicate the addressing digits.
Note For information about how to configure T1 CAS on the Cisco ICS 7750, refer to
Using Media Gateway Control Protocol with the Cisco ICS 7750.
Single Point MGCP Configuration
Cisco IOS Release 12.2(4)YH on the Cisco ICS 7750 adds single point configuration of MGCP gateways.
When you use a voice gateway (such as an MRP) with MGCP and Cisco CallManager Release 3.1 or later, the gateway can use the Trivial File Transfer Protocol (TFTP) to automatically download and configure most of the configuration information it requires to operate. You configure MGCP using Cisco CallManager Administration, using the instructions provided in the on-line help and documentation provided with Cisco CallManager. On the gateway, you complete basic Cisco IOS configuration and identify the TFTP download server with the following commands:ccm config server <tftp_server>ccm config
With this feature, you do not have to manually synchronize MGCP voice gateway configuration between the gateway and Cisco CallManager. Whenever you change the gateway configuration on Cisco CallManager, restarting the gateway enables the new configuration. This feature makes it easy to ensure consistent configuration for all the voice gateways of a specific type or function.
Note This feature supports only IOS CLI commands which begin with
Note When you use MGCP with Cisco CallManager Release 3.0, you need to complete MGCP configuration using Cisco IOS command line interface (CLI) commands on the local gateway. You must still complete the Cisco CallManager configuration using Cisco CallManager Administration. The configuration on each local gateway must match the configuration on Cisco CallManager for that gateway.
For more information about using this functionality with Cisco CallManager, refer to Interworking of Cisco MGCP Voice Gateways and Cisco CallManager Version 3.1, at this URL:
The following sections contain important notes about Cisco IOS-related issues that can apply to the Cisco ICS 7750.
Software Images on MRP and ASI Cards
All of the MRP and ASI cards in a Cisco ICS 7750 must run the same Cisco IOS image.
Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels.
Caveats in Release 12.2 T are also in Release 12.2(4)YH. For information on caveats in Cisco IOS Release 12.2 T, refer to the Caveats for Cisco IOS Release 12.2 T document. For information on caveats in Cisco IOS Release 12.2, refer to the Caveats for Cisco IOS Release 12.2 document. These documents list severity 1 and 2 caveats, and are located on CCO and the Documentation CD.
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.
Open Caveats - Release 12.2(4)YH
This section describes unexpected behavior in Release 12.2(4)YH.
If an MRP is connected directly to a Cisco 3660 Series router, some time slots might be seized for T1 lines which use E&M signaling. As a result, calls on the seized time slots will not succeed. This problem has been observed intermittently, and only in this specific configuration (MRP to Cisco 3660 Series router connection). This problem will not occur if the MRP is connected to a PSTN T1 interface using E&M signaling.
There is no workaround.
In rare cases, it is possible that if an MRP FXS interface is being used, following the termination of a call (when the called party hangs up), if the caller does not hang up until after the fast busy signal ends (fast busy lasts approximately 30 seconds), a loud hissing sound will be heard.
Workaround—Hanging up the phone will solve the problem.
If an MRP FXO-M1 interface is being used, and if the connection trunk command is used to create a "virtual trunk" between the MRP FXO-M1 interface and an MRP FXS interface, the connection will fail.
Workaround—Configure the connection to use PLAR or a standard dial-peer configuration. Refer to Configuring Connection Trunk for more information about this type of configuration.
If an MRP FXO-M1 interface is being used, in rare cases calls being placed through that port will not be connected, and when the calling phone hangs up, the MRP FXO-M1 interface will change to an off-hook status.
Workaround—Enter a shut and a no shut command on the MRP FXO-M1 interface.
If you attempt to configure channel-groups and PRI-groups on the same MRP T1 or E1 controller, the configuration might fail, due to a computational error that will cause the time slot numbering to be off by one. (Configuring multiple channel-groups on the same MRP T1 or E1 controller will still succeed.)
For example, if time slots 1-8 are used for the channel-group, when a PRI-group is configured on time slots 9-31, the configuration will fail:Router#conf tEnter configuration commands, one per line. End with CNTL/Z.Router(config)#controller e1 1/1Router(config-controller)#channel-group 1 timeslots 1-8Router(config-controller)#pri-group timeslots 9-31%Channel-group 8 is already definedRouter(config-controller)#
In this example, configuring the PRI-group time slots from 10-31, instead of from 9-31, will succeed.
Workaround—Use one of the following approaches to solve this problem:
•Do not configure channel-groups and PRI-groups on the same T1 or E1 controller. Configure channel-groups on one controller and PRI-groups on another controller.
•When configuring channel-groups and PRI-groups on the same T1 or E1 controller, do not use the time slot immediately following the last time slot on which the channel-groups are configured.
If you enter the command ip rsvp bandwidth or no ip rsvp bandwidth on an MRP serial interface, 270K of MRP memory will be lost. If you enter either of these commands multiple times, the MRP will run out of available memory.
Workaround—Do not enter the ip rsvp bandwidth or no ip rsvp bandwidth commands an the same MRP serial interface more than once.
If the primary instance of Cisco CallManager goes out of service, when the primary Cisco CallManager returns to service, any installed ASI cards might respond to a query sent by the primary Cisco CallManager with an outdated connection ID.
There is no impact on system functionality.
The following sections describe the documentation available for the Cisco ICS 7750. 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:
The following documents are specific to Release 12.2 and apply to Release 12.2(4)YH. They are located on Cisco.com and the Documentation CD-ROM:
•Caveats for Cisco IOS Release 12.2 and 12.2 T
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 to Cisco.com and click Technical Support:
Tools & Utilities: Software Bug Toolkit. Another option is to go to http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl.
Cisco ICS 7750 Documents
The documents described in this section are available on Cisco.com and on CD:
Products & Services: Voice Application Systems: Cisco ICS 7700 Series Integrated Communications Systems: Instructions and Guides
On the Documentation CD-ROM (order number DOC-CONDOCCD=) at:
Product Documentation: Voice/Telephony: Cisco ICS 7750
Printed versions of many of the platform-specific documents can be ordered as a boxed set (order number DOCS-7750=).
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 email@example.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.
Feature Navigator is updated when major Cisco IOS software releases and technology releases occur. You can access Feature Navigator at the following URL:
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.
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.
Release 12.2 Documentation Set
Table 8 describes the contents of the Cisco IOS Release 12.2 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.
Note Some aspects of the complete Cisco IOS Release 12.2 software documentation set might not apply to the Cisco ICS 7750.
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 URL:
Translated documentation is available at the following URL:
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped 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 through an annual subscription.
Cisco documentation is available in the following ways:
•Registered Cisco Direct Customers can order Cisco product documentation from the Networking Products MarketPlace:
•Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:
•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).
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 firstname.lastname@example.org.
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
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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 by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.
Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information, networking solutions, services, programs, and resources at any time, from anywhere in the world.
Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you to
•Streamline business processes and improve productivity
•Resolve technical issues with online support
•Download and test software packages
•Order Cisco learning materials and merchandise
•Register for online skill assessment, training, and certification programs
You can self-register on Cisco.com to obtain customized information and service. To access Cisco.com, go to the following URL:
Technical Assistance Center
The Cisco TAC is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two types of support are available through the Cisco TAC: the Cisco TAC Web Site and the Cisco TAC Escalation Center.
Inquiries to Cisco TAC are categorized according to the urgency of the issue:
•Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities, product installation, or basic product configuration.
•Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.
•Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available.
•Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.
Which Cisco TAC resource you choose is based on the priority of the problem and the conditions of service contracts, when applicable.
Cisco TAC Web Site
The Cisco TAC Web Site allows you to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to the following URL:
All customers, partners, and resellers who have a valid Cisco services contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to the following URL to register:
If you cannot resolve your technical issues by using the Cisco TAC Web Site, and you are a Cisco.com registered user, you can open a case online by using the TAC Case Open tool at the following URL:
If you have Internet access, it is recommended that you open P3 and P4 cases through the Cisco TAC Web Site.
Cisco TAC Escalation Center
The Cisco TAC Escalation Center addresses issues that are classified as priority level 1 or priority level 2; these classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer will automatically open a case.
To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to the following URL:
Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled; for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). In addition, please have available your service agreement number and your product serial number.
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Copyright © 2002, Cisco Systems, Inc.
All rights reserved.