|
|
These release notes for the Cisco uBR924 cable access router support Release 12.0(4)XI. 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 and related documents.
For a list of the software caveats that apply to Release 12.0(4)XI, see the "Caveats" section. See also Caveats for Cisco IOS Release 12.0 T located on Cisco Connection Online (CCO) and the Documentation CD-ROM.
Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.0 located on (CCO) and the Documentation CD-ROM.
These release notes describe the following topics:
The Cisco uBR924 cable access router is part of a new class of Cisco data-over-cable products. The Cisco uBR924 cable access router is DOCSIS-based and interoperates with any DOCSIS-compliant headend. It integrates a 4-port 10BaseT hub and 2 RJ-11 VoIP telephone jacks into a single compact design. The Cisco uBR924 cable access router can be configured to support data, voice, or a mixture of data and voice.
This section describes the system requirements for Release 12.0(4)XI and includes the following sections:
| Feature Set | Image Name | Flash Memory Required |
DRAM Memory Required |
Runs From |
Feature Status |
|---|---|---|---|---|---|
| IP Routing Standard Feature Sets | |||||
| 1These are standard Cisco factory assignments. |
To support differentiated voice services should you have Cisco uBR7200 Series headend equipment, use any Cisco IOS Release 12.0(4)XI image or higher. These headend images allow the definition of multiple Service Identifiers (SIDs) on the upstream. Voice traffic can then be designated on higher Quality of Service (QoS) secondary SIDs, while data traffic can be forwarded on a primary SID. That way, higher QoS SIDs receive preferential treatment at the headend for grants over any tiered "best effort" type data SIDs on that upstream.
To configure the Cisco uBR924 cable access router to support multiple classes of service, use the configuration file editor of your choice. DOCSIS configuration files can contain three Classes of Service (CoS) to support voice. The first CoS can be used for data (and voice if no other CoS are defined). The second and third CoS can be used for voice from each of the two telephone ports on the Cisco uBR924 cable access router.
Note The Cisco uBR924 cable access router interoperates with a DOCSIS 1.0 headend that does not support multiple CoS. Because voice and data traffic will be mixed, however, voice traffic will be transmitted on a best effort basis. This may cause poorer voice quality and lower data throughput when calls are being made from the Cisco uBR924 cable access router's telephone ports.
When configured to support voice, the Cisco uBR924 cable access router packetizes and transports voice in compliance with the H.323 protocol. Only version 2 of the H.323 protocol is tested. H.323v2 is integrated in Cisco gatekeeper/gateway products, such as the 2600 and 3600, in Cisco IOS Release 12.0(5)T or higher.
Cisco IOS Release 12.0(4)XI supports the following hardware features:
The Cisco uBR924 cable access router interacts with the Cable Modem Termination System (CMTS)—the cable system headend equipment that enables data connectivity between Internet Protocol (IP) hosts and connected subscribers over the broadband infrastructure. The Cisco uBR924 cable access router interoperates with any DOCSIS-based CMTS that supports the feature set.
The router ships from the Cisco factory with a Cisco IOS image that supports data only. Should your network support digitized voice over an IP network (VoIP) and you have a valid license, you can download the Cisco IOS image that supports voice from CCO. The router ships from the Cisco factory with the console port enabled to allow local configuration of the unit.
When configured to support voice, the Cisco uBR924 cable access router uses the H.323 protocol. Other voice protocols will be supported in later releases. The router supports compression and decompression algorithms (vocoders) such as G.729 and G.711.
The Cisco uBR924 cable access router is able to implement multiple classes of service on the cable interface. A multiple SID-per-cable access router feature enables the Cisco uBR924 cable access router to use multiple SID queues for differentiated services. The Cisco uBR924 cable access router diverts voice call traffic to the higher QoS secondary SID, while forwarding "best effort" data from the Ethernet interface and MAC messages on the primary SID.
For more information see the "New and Changed Information" section.
To determine the version of Cisco IOS software running on your Cisco uBR924 cable access router, log in to the Cisco uBR924 cable access router and enter the show version user EXEC command.
For information about updating to a new software release, see Cisco IOS Software Release 12.0 Upgrade Paths and Packaging Simplification product bulletin located at:
http://www.cisco.com/kobayashi/library/12.0/120MigrPaths.pdf
If you do not have an account on CCO and want general information about upgrading to a new software release, see Cisco IOS Software Release 11.3 Upgrade Paths and Packaging Simplification (#703:12/97) product bulletin located on CCO at:
Service & Support: Product Bulletins: Software
Under Cisco IOS 11.3, click Cisco IOS Software Release 11.3 Upgrade Paths (#703: 12/97).
This product bulletin does not contain information specific to Cisco IOS Release 12.0(4)XI, but provides generic upgrade information that may apply to Cisco IOS Release 12.0(4)XI.
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.
Table 2 lists the features and feature sets supported by Cisco IOS Release 12.0(4)XI for the Cisco uBR924 cable access router. Table 2 uses the following conventions to identify features:
| Feature Sets | |||
|---|---|---|---|
| Feature | In | Home Office | Home Office with Voice |
Network Address Translation and Port Address Translation (NAT/PAT), DHCP Server |
|||
| Network Management | |||
The following sections list hardware and software features supported by the Cisco uBR924 cable access router for Cisco IOS Release 12.0(4)XI.
The following new hardware features are supported in Cisco IOS Release 12.0(4)XI.
The Cisco uBR924 cable access router is a bidirectional cable access router that gives a residential or Small Office/Home Office (SOHO) subscriber high-speed Internet or Intranet access and packet telephone services via a shared two-way cable system and IP backbone network. The router is compatible with DOCSIS.
The Cisco uBR924 cable access router is a compact, easy-to-install device that contains:
The following software features are supported in Cisco IOS Release 12.0(4)XI.
The Cable Device MIB is for DOCSIS-compliant cable access routers and CMTS. The Cable Device MIB records statistics related to the configuration and status of the Cisco uBR924 cable access router. Statistics include an events log and device status. The following list details the components of the Cable Device MIB:
The Cable Device MIB is very similar to the RFI MIB in that both allow access to statistics; they are different in that the Cable Device MIB reports statistics on the Cisco uBR924 cable access router, and the RFI MIB reports statistics on the radio frequency transmissions over the cable television line.
The Cisco Standard MIBs consists of the following components:
Note The Cisco Management Information Base (MIB) User Quick Reference publication is no
longer published. For the latest list of MIBs supported by Cisco, see the Cisco Network Management
Toolkit on Cisco Connection Online (CCO). From the CCO home page, click on this path:
Service & Support: Software Center: Network Mgmt Products: Cisco Network Management
Toolkit: Cisco MIB
The Cisco Voice MIBs consists of the following components:
Full and DOCSIS-Compliant Bridging for the Cisco uBR924 cable access router is compatible with the DOCSIS standards for interoperable cable access routers and supports two modes of transparent bridging:
Acceptable voice quality and reduction in network bandwidth usage are achieved by using several voice processing techniques. Digital Signal Processors (DSPs), in combination with DSP firmware in the Cisco uBR924 cable access router, provide the stream-to-packet and packet-to-stream conversion, as well as voice processing capabilities. Typical voice processing services include echo cancellation, voice compression, Voice Activity Detection (VAD) or silence compression and Dual Tone Multi-Frequency (DTMF) tone detection and generation. Supported vocoders include:G.711 A Law 64000 bps, G.711 u Law 64000 bps, G.723.1 5300 bps, G.723.1 6300 bps, G.726 16000 bps, G.726 24000 bps, G.726 32000 bps, G.728 16000 bps, G.729 Annex-A 8000 bps, G.729 8000 bps.
Use of the H.323 protocol typically involves a dial plan and mapper at the headend to map IP addresses to telephone numbers. You can also set static routes. Use dial peer commands to define local and remote peers. For the backup POTS port, define port and E.164 addresses. For remote peers', define remote peers IP address and E.164 address.
Note If you have Cisco Network Registrar (CNR) version 2.5 with TCL script, you can assign E.164 addresses to local ports and use a gatekeeper to resolve the remote peers' IP addresses. CNR uses the DHCP option (merit dump file) containing an ASCII string which defines the E.164 address-to-port assignments. The Cisco uBR924 cable access router software creates dial-peers, starts H.323 RAS gateway support, and registers the E.164 addresses with the gatekeeper. Functionality is augmented in Cisco IOS Release 12.0(5)T and higher.
Network Address Translation (NAT):
Routing protocols will run on the Ethernet interface instead of the cable interface, and all packets received are translated to the correct private network IP address and routed out the Ethernet interface. This eliminates the need to run RIP on the cable interface.
To implement the Cisco uBR924 cable access router, the Ethernet interface is configured with an "inside" address and the cable interface is configured with an "outside" address. The Cisco uBR924 cable access router also supports configuration of static connections, dynamic connections, and address pools.
The Radio Frequency Interface (RFI) MIB module is for DOCSIS-compliant radio frequency interfaces in cable access routers and cable access router termination systems. On the cable access router, RFI MIB entries provide:
The RFI MIB includes tables describing both the cable access router termination system and the cable access router side of the cable interface. All cable access router tables are implemented.
A routing configuration for the Cisco uBR924 cable access router is most likely used when the cable access router is being added to an existing personal computer network or when the cable access router is being configured for five or more personal computers. The Cisco uBR924 cable access router will automatically configure the headend's IP address as its IP default gateway. When the IP host-routing is being configured, this automatic configuration of the headend's IP address as its IP default gateway will allow the Cisco uBR924 cable access router to send packets not intended for the Ethernet interface to the headend.
RIP V2 routing is useful for small internetworks in that it enables optimization of NIC-assigned IP addresses by defining VLSMs for network addresses, and it allows CIDR addressing schema.
This section describes warnings and cautions about using Cisco IOS Release 12.0(4)XI software.
This section contains important information about use of your Cisco IOS Release 12.0(4) XI software.
When configured to support voice in a bridging mode, the uBR924 cable access router must be communicating with a routing headend. This is corrected in Cisco IOS Release 12.0(5)T or higher.
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. Application developers should update from deprecated MIBs to the replacement MIBs as shown in.
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 are the most severe 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 12.0 T are also in Release 12.0(4)XI.
For information on caveats in Cisco IOS Release 12.0, see Caveats for Cisco IOS Release 12.0.
For information on caveats in Cisco IOS Release 12.0 T, see Caveats for Cisco IOS Releaser 12.0 T, which lists severity 1 and 2 caveats, and is located on CCO and the Documentation CD-ROM.
Note Note If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. You can reach Bug Navigator II on CCO at: Software & Support: Online Technical Support: Bug Toolkit. You can also find Bug Navigator II at: http://www.cisco.com/support/bugtools.
This section describes possibly unexpected behavior by Release 12.0(4)XI. Unless otherwise noted, these caveats apply to all 12.0 releases up to and including 12.0(4)XI.
Values selected for Initial Ranging backoffs are not random enough. This can cause several Cisco uBR924 cable access routers that are powered on at the same time to take a long time to get through initial ranging and bring the cable interface up.
To avoid this problem, configure the headend to specify a larger ranging backoff start value. To do this on the Cisco uBR7200 Series headend equipment, specify the ranging-backoff command on the correct upstream for the Cisco uBR924 cable access router.
Note By changing these values, you will be changing all cable modems/cable access routers-not just the uBR924-attached to that upstream.
After receiving a UCC request, the Cisco uBR924 cable access router can complete initial ranging too soon. This can cause the router to fail in secondary ranging because the unit took too long to get through secondary ranging. In most instances, the Cisco uBR924 cable access router will get to the correct channel.
If a timeout occurs first, however, the router will do a MAC reset and come back up on the upstream that it was first able to range on. To work around this problem, put the desired upstream channel for the router in the DOCSIS configuration file. The Cisco uBR924 cable access router will come up initially on the desired upstream channel and a UCC will not be required.
The following sections describe the documentation available for the Cisco uBR924 cable access router and related documents. 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 CCO and the Documentation CD-ROM.
Use these release notes with these documents:
The following documents are specific to Release 12.0 and are located on CCO and the Documentation CD-ROM:
· Release Notes for Cisco IOS Release 12.0
You can reach Cross-Platform Release Notes for Cisco IOS Release 12.0 on CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes for Cisco IOS Release 12.0
You can reach Cross-Platform Release Notes for Cisco IOS Release 12.0 on the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Release Notes: Cross-Platform Release Notes for Cisco IOS Release 12.0
You can reach these documents on CCO at:
Service & Support: Technical Documents
As a supplement to the caveats listed in "Caveats" section in these release notes, see Caveats for Cisco IOS 12.0 T, which contains caveats applicable to all platforms for all maintenance releases of Release 12.0 XI.
You can reach the caveats document on CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Caveats for Cisco IOS Release 12.0 T
You can reach the caveats document on the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: Caveats for Cisco IOS Release 12.0 T
The following documents are available for the Cisco uBR924. These documents are also available on CCO and the Documentation CD-ROM.
· Cisco uBR924 Cable Access Router Quick Start Guide
· Bridging and Routing Features for the Cisco uBR924 Cable Access Router
· Regulatory Compliance and Safety Info. for the Cisco uBR924 Cable Access Router
You can reach Cisco uBR924 documentation on CCO at:
Software & Support: Documentation: Cisco Documentation: Cisco Product Documentation: Broadband/Cable Solutions: Cisco uBR900 Series Cable Access Routers
You can reach Cisco uBR924 documentation on the Documentation CD-ROM (projected availability June 1999) at:
Cisco Product Documentation: Broadband/Cable Solutions: Cisco uBR900 Series Cable Access Routers
Feature modules describe new features supported by Release 12.0 XI, and 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.
You can reach the feature modules on CCO at:
Service & Support: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation: New Features in 12.0-Based Limited Lifetime Releases: New Features in Release 12.0 XI
You can reach the feature modules on the Documentation CD-ROM at:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.0: New Feature Documentation: New Features in 12.0-Based Limited Lifetime Releases: New Features in Release 12.0 XI:
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.
Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference.
Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality and contain comprehensive configuration examples.
Chapters in a command reference provide complete command syntax information. 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: Cisco IOS Interface Configuration Guide or Cisco IOS Interface Command Reference
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 Interface Configuration Guide or Cisco IOS Interface Command Reference
Table 4 describes the contents of the Cisco IOS Release 12.0 software documentation set, which is available in electronic form and in printed form upon request.
Note You can find the most current Cisco IOS documentation on the latest Documentation CD-ROM and on the Web. These electronic documents may contain updates and modifications made after the paper documents were printed.
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
Note The Cisco Management Information Base (MIB) User Quick Reference publication is no longer published. For the latest list of MIBs supported by Cisco, see Cisco Network Management Toolkit on CCO at: Service & Support: Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIBs.
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.
Note If you purchased your product from a reseller, you can access CCO as a guest. CCO is Cisco Systems' primary real-time support channel. Your reseller offers programs that include direct access to CCO services.
For service and support for a product purchased directly from Cisco, use CCO.
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:
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
Posted: Fri Jan 17 15:20:28 PST 2003
All contents are Copyright © 1992--2002 Cisco Systems, Inc. All rights reserved.
Important Notices and Privacy Statement.