Table Of Contents
Release Notes for Cisco 2600 Series for
Cisco IOS Release 12.0(4)XHDetermining the Version of Your Software Release
Upgrading to a New Software Release
Debit Card for Packet Telephony on Cisco Access Platforms
Interactive Voice Response for Cisco Access
Caveat CSCdr91706 and IOS HTTP Vulnerability
Open Caveats—Release 12.0(4)XH
Resolved Caveats—Release 12.0(4)XH
Cisco IOS Software Documentation Set
Cisco IOS Release 12.0 Documentation Set
Software Configuration Tips on Cisco's Technical Assistance Center Home Page
Release Notes for Cisco 2600 Series for
Cisco IOS Release 12.0(4)XH
December 1, 2000
These release notes for Cisco 2600 series routers support Cisco IOS Release 12.0(4)XH4. These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode or modem code changes and related documents.
Use these release notes with cross-platform Release Notes for Cisco IOS Release 12.0 located on Cisco Connection Online (CCO) and the Documentation CD-ROM.
For a list of software caveats that apply to Release 12.0(4)XH4, refer to the "Caveats" section.
Contents
These release notes describe the following topics:
Introduction
The Cisco 2600 series modular access router is part of a family of modular routers which includes the Cisco 1600, Cisco 1700, and Cisco 3600 series. This modular architecture provides the versatility needed to adapt to changes in network technology as new services and applications become available. Driven by a powerful RISC (Reduced Instruction Set Computing) processor, the Cisco 2600 series supports the advanced Quality of Service (QoS), security, and network integration features required in today's evolving enterprise networks.
System Requirements
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Determining the Version of Your Software Release
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Memory Recommendations
Hardware Supported
Cisco IOS Release 12.0(4)XH4 supports the Cisco 2600 series routers:
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For detailed descriptions of the new hardware features for Cisco IOS Release 12.0, refer to the cross-platform Release Notes for Cisco IOS Release 12.0.
Table 2 Supported Interfaces on the Cisco 2600 Series
1- or 2-port Ethernet (10BaseT)
Cisco 2610, Cisco 2611, Cisco 2612
1-port Token Ring (RJ-45)
Cisco 2612 and Cisco 2613
10/100 Ethernet, 1 or 2 ports
Cisco 2620 and Cisco 2621
1-port Ethernet
All Cisco 2600 series platforms
4-port Ethernet
All Cisco 2600 series platforms
1-port ATM-25 RJ-45 interface
All Cisco 2600 series platforms
16- or 32-port Asynchronous
All Cisco 2600 series platforms
4- or 8-port Asynchronous/ Synchronous Serial low speed
(128 kbps max)All Cisco 2600 series platforms
1- or 2-port Channelized T1/ISDN PRI
All Cisco 2600 series platforms
1- or 2-port Channelized T1/ISDN PRI with CSU
All Cisco 2600 series platforms
1- or 2-port Channelized E1/ISDN PRI balanced
All Cisco 2600 series platforms
1- or 2-port Channelized E1/ISDN PRI unbalanced
All Cisco 2600 series platforms
4-or 8-port ISDN BRI S/T interface
All Cisco 2600 series platforms
4- or 8-port ISDN BRI U (NT1) interface
All Cisco 2600 series platforms
8- or 16-port Analog modems
All Cisco 2600 series platforms
1- or 2- Voice interface card slots
All Cisco 2600 series platforms
2-port FXS Voice/Fax interface card2
All Cisco 2600 series platforms with Voice/Fax network modules
2-port E&M Voice/Fax interface card2
All Cisco 2600 series platforms with Voice/Fax network modules
2-port FXO Voice/Fax interface card2
All Cisco 2600 series platforms Voice/Fax network modules
2-port ISDN BRI S/T-TE Voice/Fax interface card
All Cisco 2600 series platforms with 2-slot Voice/Fax network modules
1-port ISDN BRI S/T interface (requires external NT1)
All Cisco 2600 series platforms
1-port ISDN BRI (NT1) U
All Cisco 2600 series platforms
1-port 56/64-kbps DSU/CSU
All Cisco 2600 series platforms
1-port T1/Fractional T1 with DSU/CSU
All Cisco 2600 series platforms
1-port High-Speed Serial (up to 2.048 Mbps)
All Cisco 2600 series platforms
2-port Dual High-speed Serial (up to 2.048 Mbps; Asynchronous/ Synchronous support)
All Cisco 2600 series platforms
2-port Asynchronous/ Synchronous (up to 128 kbps)
All Cisco 2600 series platforms
Data Compression AIM (up to 8.192 Mbps)
All Cisco 2600 series platforms
1 The Voice/Fax and ATM-25 network modules require Cisco IOS Plus feature sets.
2 This interface card requires the NM-1V or NM-2V network module.
Determining the Version of Your Software Release
To determine the version of Cisco IOS software running on a Cisco 2600 series router, log in to the router and enter the show version EXEC command:
router>show versionCisco Internetwork Operating System SoftwareIOS (tm) 2600 Software (c2600-i-mz), Version 12.0(4)XH4, RELEASE SOFTWAREUpgrading to a New Software Release
For information on upgrading to a new software release, refer to the Cisco IOS Software Release 12.0XH Upgrade Paths and Packaging Simplification product bulletin located on CCO at:
Service & Support: Product Bulletins: Software.
Under Cisco IOS 12.0, click Cisco IOS Software Release 12.0(4)XH Upgrade (#948: 7/99).
Other Firmware Code
The latest version of analog modem firmware for the Cisco 2600 series allows support of the internal analog modems in a wide range of countries. Firmware version 1.2.1 extends support internationally starting with Cisco IOS Release 11.3(5)T and later releases.
You can reach Cisco 2600 firmware documentation on CCO at:
Service & Support: Documentation Home Page: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware
You can reach Cisco 2600 firmware documentation on the Documentation CD-ROM at:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers: Analog Modem Firmware
Feature Set Tables
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. All "Plus" feature sets include voice network support.
CautionCisco IOS images with strong encryption (including, but not limited to, 56-bit data encryption feature sets) are subject to United States government export controls and have a limited distribution. Images to be installed outside the United States require an export license. Customer orders may be denied or subject to delay due to United States government regulations. Contact your sales representative or distributor for more information, or send e-mail to export@cisco.com.
list the features and feature sets supported by the Cisco IOS Release 12.0(4)XH4 for the Cisco 2600 series and uses the following conventions:
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New and Changed Information
The following sections list the new hardware and software features supported by the Cisco 2600 series for Release 12.0(4)XH4.
Settlements for Packet Voice
Internet voice telephony is often used for toll bypass by using an existing data network or the Internet instead of PSTN trunking. Calls of this nature require an originating and terminating gateway to be completed. When the originating and terminating voice gateways are owned by two different carriers, settlement between these carriers is required. The Settlements for Packet Voice project implements a standardized settlement protocol, which can be implemented between different vendors, gateways, and voice settlement servers.
Debit Card for Packet Telephony on Cisco Access Platforms
The Debit Card feature provides the ability to offer calling service with the use of debit accounting to service providers. The Debit Card for Packet Telephony on Cisco Access Platforms is one application supported by the Cisco Interactive Voice Response (IVR) feature. The IVR voice scripts have been modified to use Tool Command Language (TCL) scripts.
TCLWare
The Debit Card for Packet Telephony on Cisco Access Platforms feature requires the use of both Audio Files and TCL Scripts. Unzip and download the files to your TFTP server.
In addition, download the audio files and TCL scripts from the Access Products Service and Support site on CCO at the following "TCLWare" location:
http://www.cisco.com/kobayashi/sw-center/sw-access.shtml
Interactive Voice Response for Cisco Access
Cisco is building voice gateways to connect more traditional telephone networks to voice over IP (VoIP) networks. Customers who are installing VoIP networks often need a mechanism at the gateway to present a customized interface to the caller. The Interactive Voice Response (IVR) feature was first made available to customers with Cisco IOS Release 11.(3)NA2 with the Service Provider VoIP feature set. IVR, with the addition of scripts using Tool Command Language (TCL), is being introduced with Cisco IOS Release 12.0(4)XH. These TCL IVR scripts are the default scripts that must be used with the IVR application in Cisco IOS Release 12.0(4)XH and future releases.
IVR consists of simple voice prompting and digit collection to gather caller information for authenticating the user and identifying the destination. IVR provides the ability to:
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H.323 Version 2 Support
H.323 Version 2 Support upgrades Cisco IOS software to comply with the mandatory requirements in the Version 2 specification. This upgrade enhances the existing Voice Over IP GateWay, the Multimedia Conference Manager (GateKeeper and Proxy), and the DTMF digital relay by using H.245.
DTMF is the tone generated on a touch-tone phone when you press keypad digits. The tones are compressed into a single stream at one end of a call and decompressed at the other end by using H.245 messages. However, doing this can lead to distortion, depending upon the CODEC used. Thus, the DTMF-relay is used to configure a method to transport DTMF tones generated after the call is established out-of-band. The three methods are:
The standard H.323 out-of-band method uses H.245 to send digits as audible DTMF tones with voice; (the "h245-signal" option).
The H.245 "alphanumeric" method (the "h245-alphanumeric" option) also uses User Input Indication as part of a control channel, and is another standard H.245 transmission method.
The "cisco-rtp" method sends the voice stream but with an identifier indicating that the DTMF tones are added.
H.323 Version 2 defines a lightweight registration procedure that requires full registration for initial registration, but uses an abbreviated renewal procedure to update the gatekeeper and minimize overhead. Lightweight registration requires each endpoint to specify a TimeToLive (TTL) value in its Registration Request (RRQ) message.
The H.323 Version 2 gateway supports the registration of fully-qualified E.164 numbers with the gatekeeper for phones connected directly to the gateway. Tunneling through H.225 User-to-User Information Element (UUIE) facilitates transparent handling of supplementary services between two endpoints through a VoIP network. This eliminates the need to interpret various supplementary signaling messages in the VoIP gateways.
The H.323 Version 2 gatekeeper selects a destination gateway by choosing a gateway from among all gateways registered in a zone by allowing you to assign selection priorities to these gateways based on the dialed prefix. Gateway resource reporting allows the gateway to notify the gatekeeper when H.323 resources are getting low. The gatekeeper uses this information to determine which gateway it will use to complete a call and maintains a separate gateway list ordered by priority for each of its zone-prefixes.
Important Notes
This section contains important information about use of your Cisco IOS Release 12.0(4)XH4 software.
Caveat CSCdr91706 and IOS HTTP Vulnerability
A defect in multiple releases of Cisco IOS software will cause a Cisco router or switch to halt and reload if the IOS HTTP service is enabled, browsing to http://router-ip/anytext?/ is attempted, and the enable password is supplied when requested. This defect can be exploited to produce a denial of service (DoS) attack.
The vulnerability, identified as Cisco bug ID CSCdr91706, affects virtually all mainstream Cisco routers and switches running Cisco IOS software releases 12.0 through 12.1, inclusive. This is not the same defect as CSCdr36952.
The vulnerability has been corrected and Cisco is making fixed releases available for free to replace all affected IOS releases. Customers are urged to upgrade to releases that are not vulnerable to this defect as shown in detail below.
This vulnerability can only be exploited if the enable password is known or not set.
You are strongly encouraged to read the complete advisory, which is available at http://www.cisco.com/warp/public/707/ioshttpserverquery-pub.shtml.
Deprecated MIBs
Older Cisco Management Information Bases (MIBs) will be replaced in a future release. OLD-CISCO-* MIBS are currently migrated into more scalable MIBs without affecting existing Cisco IOS products or NMS applications. You can update from deprecated MIBs to the replacement MIBs as shown in the following table:
Limitations and Restrictions
The Settlement for Packet Voice feature is offered only in crypto images, so that Cisco can provide export controls.
Before you can download 56-bit or 56i encryption images, the image must first go through the entitlement process. This process makes sure that the image is from a registered DNS address and that the images are not coming from an encryption-restricted country (Iraq, Libya, etc.). You can entitle yourself by filling out the forms located at the following URL:
http://www.cisco.com/kobayashi/library/12.0
Once you are entitled, you can see crypto images in the upgrade planner. You do not have to entitle yourself again, unless you come from a different host. You do not have to entitle yourself for every release. Entitlement is good for all releases.
If there are any problems with your entitlement, you will either be directed to help on DNS registration (if that is your problem), or your case will be escalated to David Moore in ECRA who will review it himself.
Also, all users MUST be entitled before they can receive 56 or 56i images. Never give a 56 or 56i image to a customer if you are uncertain about their entitlement status.
Caveats
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
This section only contains open and resolved caveats for the current Cisco IOS maintenance release.
All caveats in Release 12.0 and Release 12.0T are also in Release 12.0(4)XH4.
For information on caveats in Cisco IOS Release 12.0, see Caveats for Cisco IOS Release 12.0, which lists severity 1 and 2 caveats, and is located on CCO and the Documentation CD-ROM.
For information on caveats in Cisco IOS Release 12.0T, see Caveats for Cisco IOS Release 12.0T on CCO and the Documentation CD-ROM.
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Open Caveats—Release 12.0(4)XH
This section describes possibly unexpected behavior by Release 12.0(2)XH4 and describes only severity 1 and 2 caveats:
Miscellaneous
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A Cisco 3640 with PRI gets stuck on Layer 1 activating mode if the PRI D-channel is in standby or shut mode. The following error message appears:
ISDN Se2/0:23: Could not bring up interfaceWorkaround: Remove the D-channel from standby or shut mode. To do this, remove the backup interface command, reload the router, then reinsert the backup interface command.
Resolved Caveats—Release 12.0(4)XH
The following caveats have been resolved in Cisco IOS Release 12.0(4)XH.
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The following CLI command does not function: snmp-server packetsize.
The maximum snmp packetsize for Release 12.0(3)T is fixed at 484. There is no known workaround.
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When tunneling IPX over an IP tunnel and using an extended inbound access list for IP on the tunnel interface, the IPX traffic gets blocked by the access list. As a workaround, add a permit gre statement in the extended access list.
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There is no way to configure MICA modem lines on a Cisco 3640 for dialout only. The modem dtr-active command is supposed to work, but this fails with "NO DIALTONE".
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A VIP controller hangs when encryption is used. The problem is intermittent. Reloading the Cisco 7500 returned the connections. The [shut | no shut] commands do not help.
Related Documentation
The following sections describe the documentation available for the Cisco 2600 series. These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, and other documents.
Documentation is available as printed manuals or electronic documents, except for feature modules, which are only available online.
Use these release notes with these documents:
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Release-Specific Documents
The following documents are specific to Cisco IOS Release 12.0 T, and are located on CCO and the Documentation CD-ROM:
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On CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes
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Service & Support: Technical Documents
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On CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Caveats: Caveats for Cisco IOS Release 12.0 T
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS 12.0: Caveats: Caveats for Cisco IOS Release 12.0 T
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Platform-Specific Documents
The documents listed below are available for the Cisco 2600. These documents are also available online at Cisco Connection Online (CCO) and on the Documentation CD-ROM:
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On CCO at:
Service & Support: Documentation Home Page: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers
On the Documentation CD-ROM at:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers
Feature Modules
Feature modules describe new features supported by Cisco IOS Release 12.0 T 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 CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation
On the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation
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, which are shipped with your order in electronic form on the Documentation CD-ROM—unless you specifically ordered the printed versions.
Documentation Modules
Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, 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.
On CCO and the Documentation CD-ROM, two master hot-linked documents provide information for the Cisco IOS software documentation set.
You can reach these documents on CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
You can reach these documents on the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
Cisco IOS Release 12.0 Documentation Set
describes the contents of the Cisco IOS Release 12.0 software documentation set, which is available in electronic form and also in printed form upon request.
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You can reach the Cisco IOS documentation set on CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References
You can reach the Cisco IOS documentation set on the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Configuration Guides and Command References.
Service and Support
For service and support for a product purchased from a reseller, contact the reseller, who offers a wide variety of Cisco service and support programs described in "Service and Support" of Cisco Information Packet shipped with your product.
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For service and support for a product purchased directly from Cisco, use CCO.
Software Configuration Tips on Cisco's Technical Assistance Center Home Page
If you have a CCO login account, you can access the following URL, which contains links and tips on configuring your Cisco products:
http://www.cisco.com/kobayashi/serv_tips.shtml
This URL is subject to change without notice. If it changes, point your Web browser to CCO and click on this path: Products & Technologies: Products: Technical Tips.
The following sections are provided from the Technical Tips page:
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Cisco Connection Online
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
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For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
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Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com. Translated documentation can be accessed at http://www.cisco.com/public/countries_languages.shtml.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We value and appreciate your comments.
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