Table Of Contents
Release Notes for Cisco uBR7200 Series
for Cisco IOS Release 12.1 CXCisco uBR7200 Series Universal Broadband Routers
Cisco uBR7246 VXR Universal Broadband Router
Cisco uBR7246 Universal Broadband Router
Cisco uBR7223 Universal Broadband Router
Cisco uBR7200 Series Universal Broadband Router Overview
Determining Your Software Release
Upgrading to a New Software Release
No New Hardware Features in Release 12.1(7)CX
New Software Features in Release 12.1(7)CX
Additional DOCSIS 1.1 SNMP Support
Advanced Spectrum Management Features for the Cisco uBR-MC16S Spectrum Management Card
No New Hardware Features in Release 12.1(4)CX
New Software Features in Release 12.1(4)CX
Software Features Inherited from Release 12.1(4)EC
Cable Downstream Frequency Override CLI
Cable Interface Setup Facility
"cdxCmtsCmOnOffTrapEnable" Enhancement
DOCSIS Ethernet MIB Objects Support (RFC 2665)
DOCSIS OSSI Objects Support (RFC 2233)
Enhanced Per-Modem Error Counter
Internal Modem Configuration File Editor
MPLS VPN Support for Subinterfaces and Interface Bundles
Link Up/Down Traps Support (RFC 2233)
Overlapping Subinterface IP Addresses
SNMP Objects for Clear Host, Clear Cable Modem, and Show Current CPEs
SNMP-Specific Trap CLI Enhancements
Configuring the Routing Protocol Causes a Reset of the Cable Modems
IS-IS Not Supported on Cable Interfaces
Open Caveats for Release 12.1(7)CX
Closed and Resolved Caveats for Release 12.1(7)CX
Open Caveats for Release 12.1(4)CX
Closed and Resolved Caveats for Release 12.1(4)CX
Cisco IOS Software Documentation Set
Release 12.1 Documentation Set Contents
Obtaining Technical Assistance
Contacting TAC by Using the Cisco TAC Web Site
Release Notes for Cisco uBR7200 Series
for Cisco IOS Release 12.1 CX
September 17, 2001
Note
You can find the most current Cisco IOS documentation on Cisco.com. This set of electronic documents may contain updates and modifications made after the hard-copy documents were printed.
These release notes for the Cisco uBR7200 series universal broadband routers document the new, cable-specific, leading-edge, CX train, and describe the enhancements and caveats provided in Cisco IOS Release 12.1(7)CX. These release notes are updated with each release in the train. For a list of the software caveats that apply to Release 12.1(7)CX, see the "Caveats" section.
Release 12.1 CX is based on Release 12.1 EC: in addition to the features inherited from Release 12.1(4)EC, Release 12.1 CX provides support for the new DOCSIS 1.1 standard.
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Contents
These release notes describe the following topics:
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Introduction
For information on new features and Cisco IOS commands supported by Cisco IOS Release 12.1(7)CX, see the "New and Changed Information" section and the "Related Documentation" section.
Cisco uBR7200 Series Universal Broadband Routers
The Cisco uBR7200 series universal broadband routers—the Cisco uBR7223, the Cisco uBR7246, and the Cisco uBR7246 VXR—are based on the Data-over-Cable Service Interface Specification (DOCSIS) standards. Each is designed to be installed at a cable operator's headend facility or distribution hub and to function as the cable modem termination system (CMTS) for subscriber-end devices such as Cisco uBR905 and Cisco uBR924 cable access routers, and other DOCSIS-compliant cable modems (CMs) and set-top boxes (STBs).
Cisco uBR7200 series universal broadband routers allow two-way transmission of digital data and Voice over IP (VoIP) traffic over a hybrid fiber-coaxial (HFC) network.
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The Cisco uBR7200 series routers support IP routing with a wide variety of protocols and combinations of Ethernet, Fast Ethernet, Gigabit Ethernet, serial, High-Speed Serial Interface (HSSI), Packet over SONET (POS) OC-3 and OC-12c, and Asynchronous Transfer Mode (ATM) media.
Cisco IOS Release 12.1(7)CX supports the Cisco uBR7246 VXR, Cisco uBR7246, and Cisco uBR7223.
Cisco uBR7246 VXR Universal Broadband Router
The Cisco uBR7246 VXR offers an industry-proven CMTS and carrier-class router in a scalable platform with a high-performance network processing engine to support data, voice, and video services for medium to large network installations.
The Cisco uBR7246 VXR provides the following major hardware features:
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Cisco uBR7246 Universal Broadband Router
The Cisco uBR7246 offers an industry-proven CMTS and carrier-class router in a scalable platform to support data, voice, and video services for medium to large network installations.
The Cisco uBR7246 provides the following major hardware features:
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Cisco uBR7223 Universal Broadband Router
The Cisco uBR7223 is a cost-effective, scalable interface between subscriber cable modems and the backbone data network, and is designed specifically for small to medium network installations.
The Cisco uBR7223 provides the following major hardware features:
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Cisco uBR7200 Series Universal Broadband Router Overview
Table 1 provides a quick overview of the major hardware features of the Cisco uBR7200 series universal broadband routers.
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Early Deployment Releases
These release notes describe the Cisco uBR7200 universal broadband series routers for Cisco IOS Release 12.1(7)CX. Release 12.1 CX is an early deployment (ED) release based on Release 12.1 EC, which serves as the train's starting point. Early deployment releases contain fixes to software caveats as well as support for new Cisco hardware and software features. Feature support is cumulative from release to release, unless otherwise noted.
Table 2 lists the features supported by the Cisco uBR7200 series in Cisco IOS Release 12.1(7)CX.
Table 2 Early Deployment (ED) Releases for the Cisco uBR7200 Series
AvailabilityCisco IOS
Release 12.1(7)CXNew in Release 12.1(7)CX:
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Cisco IOS
Release 12.1(4)CXNew in Release 12.1(4)CX:
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Cisco IOS
Release 12.1(4)ECInherited from 12.1(4)EC and earlier 12.1 EC releases:
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1 Only major features are listed.
2 MIB = Management Information Base
3 SNMP = Simple Network Management Protocol
4 BPI+ = Baseline Privacy Interface Plus
5 CLI = command line interface
6 In Cisco IOS Release 12.1(4)CX and subsequent releases, Hot-Standby 1+1 Redundancy is not supported when the CMTS is operating in DOCSIS 1.1 mode.
7 MPLS = Multiprotocol Label Switching
8 VPN = Virtual Private Network
System Requirements
This section describes the system requirements for Release 12.1(7)CX and includes the following sections:
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Memory Recommendations
Table 3 displays the memory recommendations of the Cisco IOS feature sets for the Cisco uBR7200 series universal broadband routers for Cisco IOS Release 12.1(7)CX. Cisco uBR7200 series universal broadband routers are available with a 16-MB or 20-MB Type II PCMCIA Flash memory card.
The image subset legend for Table 3 is as follows:
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System Interoperability
This section clarifies the operation of certain features in the Cisco uBR7200 series universal broadband routers.
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DOCSIS baseline privacy interface BPI gives subscribers data privacy across the RF network, encrypting traffic flows between the CMTS and CM. BPI ensures that a CM, uniquely identified by its Media Access Control (MAC) address, can obtain keying material for services only it is authorized to access.
BPI+ is supported in DOCSIS 1.1 to provide a set of extended services within the MAC sublayer that increase performance and system security. BPI+ is supported only when the cable modem is DOCSIS 1.1-capable and contains the digital certificates that are required by BPI+.
To enable BPI, choose software at both the CMTS and CM that support the mode of operation. For the Cisco uBR7200 series software, choose an image with "k1" in its file name or BPI in the feature set description.
The CM must also support BPI. CMs must have factory-installed RSA private/public key pairs to support internal algorithms to generate key pairs prior to first BPI establishment. BPI must be enabled via the DOCSIS configuration file.
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The Cisco uBR7200 series supports the following DOCSIS 1.0 quality of service (QoS) extensions:
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The Cisco uBR7200 series can transparently interoperate with cable modems running DOCSIS 1.0, the DOCSIS 1.0+ extensions, or DOCSIS 1.1. If a cable modem indicates at system initialization that it is DOCSIS 1.1-capable, the Cisco uBR7200 series uses the DOCSIS 1.1 features. If the cable modem is not DOCSIS 1.1-capable, but does support the DOCSIS 1.0+ QoS extensions—for example, a Cisco uBR924 cable access router running Cisco IOS Release 12.1(1)T or higher—the Cisco uBR7200 series automatically supports the cable modem's requests for dynamic services. Otherwise, the cable modem is treated as a DOCSIS 1.0 device.
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The Cisco uBR7200 series interoperates with the following cable modems:
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EuroDOCSIS operation support includes 8-MHz Phase Alternating Line (PAL) or Systeme Electronique Couleur Avec Memoire (SECAM) channel plans.•
The Cisco uBR7200 series support clock hardware and software to enable high-quality delivery of IP telephony services through synchronized data transmissions. To support the clock feature set, a Cisco uBR7246 VXR chassis must be used. The Cisco uBR7246 VXR must contain a clock card and an MC16S, MC16E, or MC28C cable interface line card. Only the MC16S, MC16E, and MC28C cable interface line cards support the external clock reference from the clock card to distribute that signal to CMs or STBs attached to the specific network segments.
Each cable modem must also support VoIP applications and the clock reference feature set to enable synchronized timing. The Cisco uBR924 cable access router, running Cisco IOS Release 12.0(7)T or later, supports the clock reference feature set automatically.
Supported Hardware
Cisco IOS Release 12.1(7)CX supports the following Cisco uBR7200 series universal broadband routers:
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For detailed descriptions of the new hardware features, see the "New and Changed Information" section.
Network Processing Engines
The Cisco uBR7223 and the Cisco uBR7246 support the following Network Processing Engines (NPE) in Cisco IOS Release 12.1(7)CX:
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The Cisco uBR7246 VXR supports the following Network Processing Engines (NPE) in Cisco IOS Release 12.1(7)CX:
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Cable Interface Line Cards
Cisco IOS Release 12.1(7)CX supports the following cable interface line cards, all of which provide connection to the HFC network:
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Table 4 provides a quick overview of the cable interface line cards supported in Cisco IOS Release 12.1(7)CX.
Port Adapter Cards
Table 5 lists and describes the port adapters supported by Cisco uBR7200 series routers in Cisco IOS Release 12.1(7)CX.
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Table 5 Cisco uBR7200 Series Port Adapter Releases
PA-4E—4-port Ethernet 10BASE-T port adapter
12.1(4)CX1
12.1(4)CX1
12.1(4)CX1
PA-8E—8-port Ethernet 10BASE-T port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-FE-TX—1-port 100BASE-TX Fast Ethernet port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-FE-FX—1-port 100BASE-FX Fast Ethernet port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-2FEISL-TX—2-port 100BASE-TX Fast Ethernet port adapter with Inter-Switch Link (ISL) support
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-2FEISL-FX—2-port 100BASE-FX Fast Ethernet port adapter with Inter-Switch Link (ISL) support
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-12E/2FE—12-port 10BASE-T and 2-port 10/100BASE-TX port adapter
Not applicable
12.1(4)CX
Not applicable
PA-GE—1-port, full-duplex, IEEE 802.3z-compliant Gigabit Ethernet (GE) port adapter2
Not applicable
Not applicable
12.1(4)CX
PA-4T+—4-port synchronous serial port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-8T-232—8-port EIA/TIA-232 synchronous serial port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-8T-V35—8-port V.35 synchronous serial port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-8T-X21—8-port X.21 synchronous serial port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-4E1G-75—4-port unbalanced (75-ohm) E1-G.703/G.704 synchronous serial port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-4E1G-120—4-port balanced (120-ohm) E1-G.703/G.704 synchronous serial port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-E3—1-port high-speed serial E3 interface port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-T3—1-port T3 serial interface port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-2E3—2-port high-speed serial E3 interface port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-2T3—2-port T3 serial interface port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-MC-E3—1-port multi-channel E3, medium-speed serial interface port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-MC-T3—1-port T3 (channelized into 28 independent T1 data lines) port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-MC-2T1—2-port multichannel DS1 Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) single-wide port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-MC-4T1—4-port multichannel DS1 Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) single-wide port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-MC-8E1/120—8-port multichannel E1 Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) single-wide port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-MC-8T1—8-port multichannel DS1 Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) single-wide port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-H—1-port HSSI port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX3
PA-2H—2-port HSSI port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX4
PA-A1-OC3SMI—1-port ATM OC-3c/STM-1 single-mode intermediate reach port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-A1-OC3MM—1-port ATM OC-3c/STM-1 multimode port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-A2-4E1XC-OC3SM—5-port ATM CES5 (4 E1 120-ohm CBR6 ports and 1 OC-3 ATM single-mode port) port adapter
Not applicable
12.1(4)CX
Not applicable
PA-A2-4E1XC-E3ATM—5-port ATM CES5 (4 E1 120-ohm CBR6 ports and 1 E3 ATM port) port adapter
Not applicable
12.1(4)CX
Not applicable
PA-A2-4T1C-OC3SM—5-port ATM CES5 (4 T1 CBR6 ports and 1 OC-3 ATM single-mode port) port adapter
Not applicable
12.1(4)CX
Not applicable
PA-A2-4T1C-T3ATM—5-port ATM CES5 (4 T1 CBR6 ports and 1 T3 ATM port) port adapter
Not applicable
12.1(4)CX
Not applicable
PA-A3-E3—1-port E3 ATM, PCI-based port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-A3-T3—1-port T3 ATM, PCI-based port adapter
12.1(4)CX
12.1(4)CX
Not applicable
PA-A3-OC3MM—1-port OC-3c ATM, PCI-based multimode port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-A3-OC3SMI—1-port OC-3c ATM, PCI-based single-mode intermediate reach port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-A3-OC3SML—1-port OC-3c ATM, PCI-based single-mode long reach port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-POS-OC3SML—1-port POS OC-3 single-mode, long reach port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-POS-OC3SMI—1-port OC3 single-mode, intermediate reach port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-POS-OC3MM—1-port POS OC3 multimode port adapter
12.1(4)CX
12.1(4)CX
12.1(4)CX
PA-SRP-OC12SML—2-port OC-12c (STM4c) single-mode fiber, long reach DPT port adapter
Not applicable
12.1(4)CX
Not applicable
PA-SRP-OC12SMI—2-port OC-12c (STM4c) single-mode fiber, intermediate reach DPT port adapter
Not applicable
12.1(4)CX
Not applicable
PA-SRP-OC12SMX—2-port OC-12c (STM4c) single-mode fiber, extended reach DPT port adapter
Not applicable
12.1(4)CX
Not applicable
PA-SRP-OC12MM—2-port OC-12c (STM4c) multimode fiber DPT port adapter
Not applicable
12.1(4)CX
Not applicable
1 The number in this column indicates the Cisco IOS release in which the interface was introduced. For example, 12.1(4)CX means that an interface was introduced in Cisco IOS Release 12.1(4)CX.
2 The Gigabit Ethernet port adapter must be combined with the appropriate optical fiber cable and a Gigabit Interface Converter (GBIC).
3 To use a PA-H 1-port HSSI port adapter in a Cisco uBR7246 VXR, be sure you have the minimum required hardware revision (version 1.17, part number 800-02747-06) or a more recent version of the port adapter.
4 To use a PA-2H 2-port HSSI port adapter in a Cisco uBR7246 VXR, be sure you have the minimum required hardware revision (version 1.3, part number 800-03306-02) or a more recent version of the port adapter.
5 CES = circuit emulation services.
6 CBR = constant bit rate.
Determining Your Software Release
To determine the version of Cisco IOS software running on the Cisco uBR7200 series universal broadband router, log in to the router and enter the show version EXEC command:
Router> show versionCisco Internetwork Operating System SoftwareIOS (tm) 12.1 CX Software (ubr7200-k1p-mz), Version 12.1(7)CX, RELEASE SOFTWAREUpgrading to a New Software Release
For general information about upgrading to a new software release, see Cisco IOS Upgrade Ordering Instructions located at http://www.cisco.com/warp/public/cc/cisco/mkt/ios/prodlit/957_pp.htm
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.
Table 6 lists the features and feature sets supported by the Cisco uBR7200 series in Cisco IOS Release 12.1(7)CX and uses the following conventions:
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Table 6 Feature List by Feature Sets for Cisco uBR7200 Series Routers
DHCP2 Server
DRP3 Server Agent
Easy IP (Phase 1)
Hot-Standby 1+1 Redundancy4
IP Type of Service and Precedence for GRE5 Tunnels
IP Enhanced IGRP6 Route Authentication
Per-Modem Filters
Cable Interface Setup Facility
Cable Monitor
Cisco Call History MIB Command Line Interface
Cisco IOS Internationalization
DOCSIS Ethernet MIB Objects Support (RFC 2665)
DOCSIS OSSI7 Objects Support (RFC 2233)
Dynamic Ranging Support
Enhanced Modem Status Display
Enhanced Per-Modem Error Counter
Entity MIB, Phase 1
Interface Command Enhancements
Internal Modem Configuration File Editor
MIB Enhancements
Multicast BPI MIB
LinkUp/Down Traps Support (RFC 2233)
RF Interface MIB
SNMP Cable Modem Remote Query
Bidirectional PIM10
IP Multicast Load Splitting across Equal-Cost Paths
IP Multicast over ATM11 Point-to-Multipoint Virtual Circuits
IP Multicast over Token Ring LANs
Stub IP Multicast Routing
Dynamic Upstream Modulation
DOCSIS 1.0+12 QoS Enhancements
DOCSIS 1.1 Support
12.1(4)CX
Additional DOCSIS 1.1 SNMP Support
12.1(7)CX
Advanced Spectrum Management Features for uBR-MC16S
12.1(7)CX
Downstream QoS Handling
Downstream Traffic Shaping
Dynamic SID support
Dynamic Map-Advance
Improved Upstream QoS
Multiple SID Support (static only)
QoS Configuration
QoS Profile Enforcement
Read/Create Implementation of QoS
RTP13 Header Compression
Time of Day (ToD) Server
Upstream Address Verification
Upstream Traffic Shaping
Automated Double Authentication
BPI Encryption and Authentication
BPI+ Encryption and Authentication
12.(4)CX
Cable Modem and Multicast Authentication Using RADIUS14
Cisco IOS Firewall Enhancements
Dynamic Mobile Hosts
HTTP15 Security
Named Method Lists for AAA16 Authorization & Accounting
Per-Modem and Per-Host Access List Support
Per-User Configuration
Reflexive Access Lists
Vendor-Proprietary RADIUS Attributes
Fast-Switched Policy Routing
MPLS VPN Support for Subinterfaces and Interface Bundles
PAD17 Subaddressing
Bandwidth Allocation Control Protocol (BACP)
Enhanced Local Management Interface (ELMI)
Frame Relay Enhancements
Frame Relay MIB Extensions
Frame Relay Router ForeSight
ISDN18 Advice of Charge
ISDN Caller ID Callback
ISDN Multiple Switch Type
ISDN NFAS19
Microsoft Point-to-Point Compression (MPPC)
VPDN22 MIB and Syslog Facility
X.25 Enhancements
1 The number in the "In" column indicates the Cisco IOS release in which the feature was introduced. For example, 12.1(4)CX means that a feature was introduced in Cisco IOS Release 12.1(4)CX. If a cell in this column is empty, the feature was included in the initial base release.
2 DHCP = Dynamic Host Configuration Protocol
3 DRP = Director Response Protocol
4 In Cisco IOS Release 12.1(7)CX, Hot-Standby 1+1 Redundancy is not supported when the CMTS is operating in DOCSIS 1.1 mode.
5 GRE = generic routing encapsulation
6 IGRP = Interior Gateway Routing Protocol
7 OSSI = Operations Support System Interface
8 SNMPv2 = Simple Network Management Protocol version 2
9 SNMPv3 = Simple Network Management Protocol version 3
10 PIM = Protocol Independent Multicast
11 ATM = Asynchronous Transfer Mode
12 The DOCSIS 1.0+ QoS Enhancements is a set of Cisco's Quality of Service extensions to DOCSIS 1.0 to enable basic VoIP service over the DOCSIS link before DOCSIS 1.1 becomes available. The main enhancements include support for dynamic creation and teardown of flows during voice calls, support for one new slot scheduling mechanism (UGS) for voice slots, and per IP-precedence rate shaping on the downstream.
13 RTP = Real-Time Transport Protocol
14 RADIUS = Remote Access Dial-In User Service
15 HTTP = Hypertext Transfer Protocol
16 AAA =authentication, authorization, and accounting
17 PAD = packet assembler/disassembler
18 ISDN = Integrated Services Digital Network
19 NFAS = non-facility-associated signaling
20 BRI = Basic Rate Interface
21 PRI = Primary Rate Interface
22 VPDN = virtual private dial-up network
23 PVC = permanent virtual circuit
24 SVC = switched virtual circuit
New and Changed Information
The following sections list the new hardware and software features supported by the Cisco uBR7200 series routers for Cisco IOS Release 12.1 CX.
No New Hardware Features in Release 12.1(7)CX
There are no new hardware features introduced in Cisco IOS Release 12.1(7)CX.
New Software Features in Release 12.1(7)CX
The following new software features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.1(7)CX.
Additional DOCSIS 1.1 SNMP Support
Release 12.1(7)CX adds support for the following new or changed MIBs:
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In addition, the CLI supports a new command (cable submgmt default) to set the default value of attributes in DOCS-SUBMGT-MIB. This command can be included in the Cisco IOS configuration file so that the new values are automatically set after a reboot or reload of the Cisco uBR7200 series router.
Advanced Spectrum Management Features for the Cisco uBR-MC16S Spectrum Management Card
The Cisco uBR-MC16S cable interface line card has a DOCSIS-based cable interface that supports one downstream and six upstreams. It incorporates a daughterboard with hardware-based spectrum management features that provide the following features:
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The Advanced Spectrum Management Features for the Cisco uBR-MC16S cable interface line card, available in Cisco IOS Release 12.1(7)CX, are a software-only upgrade that provides the following additional features:
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When using a Cisco uBR-MC16S line card on a Cisco uBR7200 series router running Cisco IOS Release 12.1(7)CX, the spectrum management hardware uses the real-time CNR readings from the DSPs on the MC16S daughtercard instead of the signal-to-noise ratio (SNR) values from the Broadcom 3137 chip to determine the signal quality of the upstream channel. The CNR value is a more accurate description of noise conditions on the upstream.
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No New Hardware Features in Release 12.1(4)CX
There are no new hardware features introduced in Cisco IOS Release 12.1(4)CX.
New Software Features in Release 12.1(4)CX
The following new software features are supported by the Cisco uBR7200 series routers in Cisco IOS Release 12.1(4)CX.
DOCSIS 1.1 Support
Cisco IOS Release 12.1(4)CX introduces support for the new DOCSIS 1.1 standard. DOCSIS 1.1 modifies the DOCSIS 1.0 specification to provide better performance, in particular for real-time traffic such as voice calls. It also provides more secure encryption and authentication between the CMTS and cable modems.
The DOCSIS 1.1 specification provides the following functional enhancements over DOCSIS 1.0 coaxial cable networks:
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DOCSIS 1.1 Quality of Service
The DOCSIS 1.1 QoS framework is based on the following objects:
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In DOCSIS 1.1, the basic unit of QoS is the service flow, which is a unidirectional sequence of packets transported across the RF interface between the cable modem and CMTS. A service flow is characterized by a set of QoS parameters such as latency, jitter, and throughput assurances.
Every cable modem establishes a primary service flow in both the upstream and downstream directions. The primary flows maintain connectivity between the cable modem and CMTS at all times.
In addition, a DOCSIS 1.1 cable modem can establish multiple secondary service flows. The secondary service flows can either be permanently created (they persist until the cable modem is reset or powered off) or they can be created dynamically to meet the needs of the on demand traffic being transmitted.
Each service flow has a set of QoS attributes associated with it. These QoS attributes define a particular class of service and determine characteristics such as the maximum bandwidth for the service flow and the priority of its traffic. The class of service attributes can be inherited from a preconfigured CMTS local service class (class-based flows), or they can be individually specified at the time of the creation of the service flow.
Each service flow has multiple packet classifiers associated with it, which determine the type of application traffic allowed to be sent on that service flow. Each service flow can also have a Payload Header Suppression (PHS) rule associated with it to determine which portion of the packet header will be suppressed when packets are transmitted on the flow.
In Cisco IOS Release 12.1(4)CX, the following new or enhanced software features are implemented for DOCSIS 1.1 functionality. (For more information, see the feature module Migrating to DOCSIS 1.1 with Cisco Cable Products).
Software Features Inherited from Release 12.1(4)EC
The following software features have been inherited from Cisco IOS Release 12.1(4)EC and earlier 12.1 EC releases and are supported by the Cisco uBR7200 series routers in Release 12.1(4)CX.
Cable Downstream Frequency Override CLI
The following CLI command turns off the cable downstream frequency override on a per-interface basis:
[no] cable downstream override
The default configuration enables the cable downstream frequency override. Only the [no] cable downstream override command is displayed and allows the cable downstream frequency override to be turned off.
Cable Interface Setup Facility
The Cable Interface Setup Facility is an alternative mechanism to enable or configure Cisco uBR7200 series parameters. The setup facility supports automated configuration of upstream parameters.
In earlier releases, upstream ports were put in a default shut-down state after the setup facility was run. You had to use the CLI to configure a fixed frequency or create a spectrum group, assign an interface to it, and enable each upstream port on a cable interface line card. The setup facility now supports configuring and enabling upstream parameters.
In the following example, the upstream parameters for a cable interface line card in slot 5 are configured and enabled. Press Return to accept the default.
Do you want to configure Cable 5/0 interface? [no]: yes Downstream setting frequency: 531000000 For cable upstream [0] Shut down this upstream? [yes/no]: no Frequency: 33808000 Would you like to configure the DHCP server? [yes/no]: yes IP address for the DHCP server [X.X.X.X]: 10.0.0.2 Configure IP on this interface? [yes]: IP address for this interface [10.20.133.65]: Subnet mask for this interface [255.0.0.0]: 255.255.255.248 Class A network is 10.0.0.0, 29 subnet bits; mask is /29In this example, the input above generates the following command interface script:
interface Cable 5/0 no shutdown cable downstream frequency 531000000 no shutdown cable downstream modulation 64qam cable downstream annex B cable downstream interleave-depth 32 no cable upstream 0 shutdown cable upstream 0 frequency 33808000 cable helper-address 10.0.0.2 ip address 10.20.133.65 255.255.255.248
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Cable Monitor
The cable monitor feature allows administrators to filter a selection of MAC messages; map messages and data packets to access lists, MAC-address numbers, and upstream port numbers; enable time stamping of each packet; and permit the option of stripping away the DOCSIS header for data packets. This makes it easier to resolve interoperability issues, understand network issues that can affect application performance and functionality, and increase the ability to manage network variables.
The configuration CLI consists of the following sniffer commands (enter configuration commands, one per line, and end with CNTL-Z):
Router(config-if)# cable monitor [outbound | incoming] [timestamp] interface <interface> {access-list <name | number> | sid <n> | mac-addr <address> | upstream <n>}[packet-type {mac [type {map-req | map-grant | dsa | dsc | dsd ... }] | data packet-header {ethernet | docsis}}]
For more information on the command line interface (CLI) and for syntax descriptions, see the Broadband Command Consolidation. The "Platform-Specific Documents" section provides details on how to access that document.
"cdxCmtsCmOnOffTrapEnable" Enhancement
The following new CLI commands are supported for the "cdxCmtsCmOnOffTrapEnable" object:
[no] cable enable-trap cmonoff-notification
[no] cable enable-trap cmonoff-interval <time 0 to 86400>These commands have the following default settings:
no cable enable-trap cmonoff-notification
no cable enable-trap cmonoff-intervalAfter the default setting has been changed and the new configuration has been saved, the new configuration will remain active after the CMTS reloads.
Syntax examples:
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DOCS-EXT-MIB Enhancements
DOCS-EXT-MIB has been modified to include the capability of counting the number of cable modems on an upstream as well as on each line card:
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DOCS-IF-MIB Enhancements
For an MC16E cable interface line card in ANNEX-A mode, DOCS-IF-MIB is compliant with EuroDOCSIS; for any other cable interface line card (that is, any "non-E" cable interface line card), DOCS-IF-MIB is compliant with DOCSIS.
The "docsIfUpChannelFrequency" object now shows the actual frequency (instead of the configured frequency) for an EuroDOCSIS-compliant cable interface line card, while it shows the configured frequency for a DOCSIS-compliant cable interface line card.
The following new CLI command allows the default-compliancy mode (that is, actual frequency for EuroDOCSIS or configured frequency for DOCSIS) of the "docsIfUpChannelFrequency" object to be changed:
test cable docs-if-mib [show | change option-code]
In this command, show indicates the current compliancy-mode, while change option-code can have a value of 1, 2, or 3:
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DOCSIS Ethernet MIB Objects Support (RFC 2665)
Support for RFC 2665, the latest revision of the Ethernet MIB, is now mandatory for DOCSIS compliance.
The key changes are as follows:
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DOCSIS OSSI Objects Support (RFC 2233)
Cisco uBR7200 series routers support the required objects in RFC 2233 for DOCSIS Operations Support System Interface (OSSI) compliance.
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Dynamic Map-Advance
The Dynamic Map-Advance feature improves the upstream throughput for a cable modem. This feature enables the map-advance to be dynamic and self-adjusting to propagation delay, even for the furthest cable modem in the plant.
Dynamic Mobile Hosts
This feature addresses a security hole that occurs when the Cisco uBR7200 router supports mobile hosts. (Mobile host are hosts that can move from one modem to another modem.) Anyone who knows the MAC address of a mobile host can "fake" the mobile host, thereby causing denial of access for the real mobile host.
To avoid this security hole, the Dynamic Mobile Hosts feature pings the mobile host on the old SID to verify that the host has indeed been moved.
Dynamic Ranging Support
The functionality of the clear cable modem <mac-address> reset command is extended to send a "Ranging Abort" message instead of just removing the SID.
A new modem state—Reset (display: resetting)— has been introduced into the modem state list. A modem is deprovisioned when moving into this state as if going offline. Move the modem to the Continue Ranging list. If a ranging request is received from the modem, send a "Ranging Abort" message. Continue until an "Initial Ranging" message is received or until normal timeout (16 attempts). If the modem does not go back to initial ranging, set it to offline.
The Reset modem state may show as follows in the output of show cable modem:
Cable4/0/U1 80 resetting 3575 0.25 3 0 10.30.160.26 0050.7318.e965This is an intermediate state. A modem will not be in this state for more than a few seconds; if the modem does not respond, it may be in this state for up to 30 seconds. The subsequent modem state is offline.
Dynamic Upstream Modulation
The Dynamic Upstream Modulation feature reduces the risks associated with transitioning to QAM16 modulation in the return path, and provides assurance that subscribers remain online and connected during periods of return-path impairments.
This new feature actively monitors the signal-to-noise-ratio (SNR) and forward error correction (FEC) counters in the active return path of each upstream port. The software tracks whether the current upstream channel signal quality can adequately support the higher modulation scheme configured, and proactively adjusts to the more robust Quadrature Phase-Shift Keying (QPSK) modulation scheme when necessary. When return-path spectrum conditions improve, the software proactively returns the upstream channel to the higher-modulation quadrature amplitude modulation (QAM) scheme. This is done through modulation profiles supported in Cisco IOS, which can be configured in a variety of ways to support the unique environment at each user's facility.
The Dynamic Upstream Modulation feature can be configured on interfaces with fixed upstream frequencies or on interfaces with spectrum groups assigned. Cisco IOS provides one preconfigured modulation profile resident in memory, which defines a typical profile for QPSK modulation. In order to use the Dynamic Upstream Modulation feature, a second profile must be created that is unique from the first profile and typically provides a higher modulation scheme.
Whether the MC1xC modem cards are used or the enhanced MC16S spectrum management modem card is used, the following CLI is the only configuration required:
cable upstream <n> modulation-profile <primary profile-number> <secondary profile-number>.Dynamic Upstream Modulation can be used along with spectrum groups. If a Cisco uBR-MC16S card is used and the Dynamic Upstream Modulation and spectrum groups are configured on the same interface, the modulation switchover is chosen as the first corrective action, followed by a frequency hop, and finally a reduction in channel width. The user can configure how the higher-modulation profile is selected by setting priorities with the following CLI:
cable upstream <n> <hop-priority frequency> <bandwidth> <modulation>
The order of the frequency, bandwidth, and modulation in the CLI determines the priority.For more information on the Dynamic Upstream Module feature, including information on creating modulation profiles using the cable modulation-profile command, see the Cisco uBR7200 Dynamic Upstream Modulation feature module. For information on creating spectrum groups using the cable spectrum-group command, see the Broadband Command Consolidation. The "Platform-Specific Documents" section provides details on how to access that document.
Enhanced Per-Modem Error Counter
The Cisco uBR7200 series supports display of per-modem error counters. A new command introduced is:
show cable modem [<ip-addr> | <mac-addr>] error
Sample display:
cmts#show cable modem errorsMAC Address SID I/F CRC HCS00d0.ba26.eee7 1 Cable4/0/U0 0 0
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Hot-Standby 1+1 Redundancy
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The Hot-Standby 1+1 Redundancy feature offers the ability to provide high system availability when configuring a Cisco uBR7200 series universal broadband router to wait in hot-standby mode to protect another Cisco uBR7200 series router in case of system failure.
The 1+1 redundancy feature is essential in a residential Voice over IP (VoIP) cable network, since it provides a three- to five-second automatic system recovery time, thus helping to eliminate "call drops" in the VoIP cable network. System failure in a nonredundancy (unprotected) deployment results in loss of all voice calls in progress as well as all voice calls in "setup" phase, because the CMTS requires human intervention to reconfigure and bring the CMTS back on line.
Configuration for 1+1 redundancy takes place at the cable interface line card interface level. That is, rather than assigning an entire Cisco uBR7200 series router to support another Cisco uBR7200 series router, individual interfaces on one Cisco uBR7200 series router are configured to protect individual interfaces installed in a different Cisco uBR7200 series router.
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The user can configure the system to switchover automatically when the interface state of a cable interface line card interface moves from "up" to "down." Alternatively, the user can manually force a switchover.
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For more information on the 1+1 redundancy feature, including information on configuration tasks and command reference, see the Hot-Standby 1+1 Redundancy feature module. For information on feature modules, see the "Feature Modules" section.
Internal Modem Configuration File Editor
This feature adds support for internal cable modem configuration file storage and generation. The cable modem configuration file will be generated and stored as part of CLI configuration. Configuration files will not be stored in Flash memory.
"MAX-CPE" CLI Override
A new cable-specific configuration command has been added:
[no] cable modem max-cpe [<n> | unlimited]
When set to unlimited or if n is larger than the "MAX-CPE" value in the config file of a cable modem, it overrides the config file value.
MPLS VPN Support for Subinterfaces and Interface Bundles
Cisco IOS Release 12.1(4)CX and subsequent releases include MPLS support as part of its VPN offerings for cable subinterfaces and interface bundles. The software offers enhancements made to tags placed on the fronts of packets that contain forwarding information used to make switching decisions for cable interfaces and bundles. This tag switching infrastructure combines advanced routing protocol capabilities to define IP VPNs by selectively advertising IP reachability information to just those subscribers within the same VPN or extranet on a cable interface.
The MPLS-VPN approach of creating VPNs for individual Internet service providers (ISPs) requires subinterfaces to be configured on cable interfaces or bundles. One subinterface is required for each ISP. The subinterfaces are tied to VPN Routing Forwarding (VRF) tables for respective ISPs.
For more feature information, refer to the Cisco uBR7200 Series MPLS VPN Cable Enhancements feature module. For information on feature modules, see the "Feature Modules" section.
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Multicast BPI MIB Support
Because a multicast SID on CMTS will not be determined until the CMTS receives an Internet Group Management Protocol (IGMP) join request from a host, the following limitations apply to "docsBpiIpMulticastServiceId" and "docsBpiMulticastServiceId":
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Link Up/Down Traps Support (RFC 2233)
The objects in the varbind list, based on Internet Engineering Task Force (IETF) standard, are defined in IF-MIB. Since IF-MIB supports subinterfaces, all objects in this varbind list are also supported for subinterfaces. The feature allows the user to base the Link Up/Down trap varbind list on a Cisco-specific or IETF standard with a new CLI configuration command:
snmp-server link-trap [cisco | ietf]
The default is a Cisco-specific link trap (snmp-server link-trap cisco). The user can switch between Cisco and IETF standard.
Overlapping Subinterface IP Addresses
Multiprotocol Label Switching (MPLS)-based Virtual Private Networks (VPNs), which are created in layer 3, provide privacy and security by constraining the distribution of a VPN's routes to those routers that are members of the VPN only, and by using MPLS forwarding. Each ISP's VPN is insulated from all others sharing the HFC and IP-over-cable infrastructure. MPLS VPN enforces traffic separation by assigning a unique VPN Routing/Forwarding (VRF) instance to each VPN. A VRF instance consists of an IP routing table, a derived forwarding table, a set of interfaces that use the forwarding table, and a set of rules and routing protocols that determine what is in the forwarding table.
Earlier Cisco IOS releases assumed that IP addresses were unique, but it is possible with an MPLS VPN to configure overlapped IP addresses within a VRF. A configuration of overlapped IP addresses could have caused errors. Cisco IOS Release 12.1(4)CX and subsequent releases support a configuration of overlapping IP addresses for subinterfaces. The same IP subnet can be configured for CPEs on different VRFs using a Cisco uBR7200 to configure an MPLS VPN. See also the "MPLS VPN Support for Subinterfaces and Interface Bundles" section.
The following CLI commands have been updated to support overlapping IP addresses on subinterfaces:
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cable host <ipaddr> [no] access-group <acl>
cable device <ipaddr> [no] access-group <acl>
show cable host <ipaddr> access-group
show cable device <ipaddr> access-group
clear cable host <ipaddr>•
cable host [vrf <vrfname>] <ipaddr> [no] access-group <ac >
cable device [vrf <vrfname> <ipaddr> [no] access-group <acl>
show cable host [vrf <vrfname>] <ipaddr> access-group
show cable device [vrf <vrfname>] <ipaddr> access-group
clear cable host [vrf <vrfname>] <ipaddr>SNMP Cable Modem Remote Query
This feature provides a new MIB, CISCO-DOCS-REMOTE-QUERY-MIB, which, once implemented on a CMTS, facilitates SNMP polling of remote CMs. This MIB includes the configuration of the CMTS CM Poller, as well as status objects of remote CMs that are polled by the CMTS CM Poller.
A new CLI command has been implemented for turning on the trap:
snmp-server enable cable cm-remote-quer
SNMP Objects for Clear Host, Clear Cable Modem, and Show Current CPEs
Host or cable modems can be cleared via the "cdxCmCpeResetNow" MIB object. The number of current CPEs can be displayed via the "cdxCmtsCmCurrCpeNumber" MIB object.
SNMP-Specific Trap CLI Enhancements
The old CLI for SNMP-specific traps was the following command:
[no] snmp-server enable traps snmp [authentication]Even though authentication was provided as an option, it did not behave as expected because entering the snmp-server enable traps snmp authentication command enabled not only the authentication traps, but also all other SNMP traps—viz, linkUp, linkDown and coldStart.
The CLI has been modified to allows all SNMP traps to be enabled or disabled separately. The modified CLI is the following command:
[no] snmp-server enable traps snmp [authentication | linkup | linkdown | coldstart]To allow all SNMP traps to be enabled or disabled simultaneously, issue the following command:
[no] snmp-server enable traps snmpSNMP Warm Start Trap
When two Cisco uBR7200 series routers are configured for failover and the active unit fails, the standby unit takes over and becomes the active unit. Whenever this occurs, a Failover Switchover SNMP trap is generated and will appear to the SNMP server as a "Warm Start" trap. This functionality is supported in Cisco IOS Release 12.1(4)CX and subsequent releases.
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Important Notes
The following sections contain important notes about Cisco IOS Release 12.1(7)CX that apply to Cisco uBR7200 series universal broadband routers.
Configuring the Routing Protocol Causes a Reset of the Cable Modems
Be aware that when configuring a routing protocol on a Cisco uBR7200 series cable interface, the Cisco IOS software must reset the interface to enable the change. This in turn causes all cable modems on that particular downstream to reinitialize, potentially interfering with data transmission on that downstream. Therefore, you should use the interface configuration commands, such as router rip, on a cable interface only when a minimum of subscribers would be affected.
Cable Bundling
To reduce the number of subnets consumed per Cisco CMTS, cable interface bundling is used. Multiple cable interfaces can share a single IP subnet. An IP subnet is required for each bundle. You can bundle all cable interfaces on a Cisco CMTS into a single bundle.
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Using the CLI, first configure a master interface for a cable interface bundle. The master interface has an IP address assigned and is visible for IP routing functionality. After you configure the master interface, add additional cable interfaces to the same interface bundle. Those interfaces must not have an IP address assigned. You can also configure multiple bundle interfaces.
Use the following commands to configure and view cable interface bundles:
[no] cable bundle n master
show cable bundle
Up to four interface bundles can be configured. In each bundle, specify exactly one interface as the master interface, using the "master" keyword. In the case of a subinterface over a cable bundle, `x' is the interface number of the bundle master [1]. The subinterface number starts from 1.
Caution
When bundling cable interfaces, only the interface configured to be the bundle master is allowed to have subinterfaces. An interface that has subinterface(s) defined over it will not be allowed to be part of a bundle.
MIB objects on cable interface bundles are not supported as of the date of this publication.
For more information on cable bundling, see the chapter "Understanding System Operations" of the
Cisco uBR7200 Series Software Configuration Guide and the Cable Interface Bundling for the Cisco uBR7200 Series Cable Router feature module. For information on feature modules, see the "Feature Modules" section.IS-IS Not Supported on Cable Interfaces
The Intermediate System-to-Intermediate System (IS-IS) routing protocol is not supported on any cable interfaces.
Cisco IOS Software Release
The initial spectrum management enhancements to the Cisco uBR-MC16S line card were introduced in the 12.1 EC release train. The advanced features described in this document require Cisco IOS Release 12.1(7)CX.
Cisco uBR-MC16S Line Card
The following restrictions apply to the Cisco uBR-MC16S line card:
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Dynamic Upstream Modulation
The following restrictions apply to the Dynamic Upstream Modulation feature:
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MIBs
Current MIBs
To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB website on Cisco.com at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
Supported MIBs
The Cisco uBR7200 series universal broadband routers support the following categories of MIBs:
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The cable-specific MIBs are described in the following section. For information on the SNMP standard MIBs and Cisco's platform and network-layer enterprise MIBs, see Cisco's MIB website at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
Cable-Specific MIBs
Table 7 shows the cable-specific MIBs that are supported on the Cisco uBR7200 series universal broadband routers. The table also provides a brief description of each MIB's contents and the Cisco IOS Software Release in which the MIB was initially functional—earlier releases might have had unsupported prototype versions of the MIB; later releases might have added new attributes and functionality. Because of interdependencies, the MIBs must be loaded in the order given in the table.
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Table 7 Cable-Specific MIBs Supported on Cisco uBR7200 Series Routers
SNMPv2-SMI.my
SNMPv2-SMI-V1SMI.my
This module specifies the Structure of Management Information (SMI) for SNMPv2, as defined in RFC1902.
12.1(4)CX
SNMPv2-TC.my
SNMPv2-TC-V1SMI.my
This module defines the textual conventions as specified in RFC1903.
12.1(4)CX
SNMPv2-MIB.my
SNMPv2-MIB-V1SMI.my
The management protocol, SNMPv2, provides for the exchange of messages that convey management information between the agents and the management stations, as defined in RFC1907.
12.1(4)CX
CISCO-SMI.my
CISCO-SMI-V1SMI.my
This module specifies the SMI for Cisco's enterprise MIBs.
12.1(4)CX
CISCO-TC.my
CISCO-TC-V1SMI.my
This module defines the textual conventions used in Cisco's enterprise MIBs.
12.1(4)CX
IF-MIB.my
IF-MIB-V1SMI.my
This module describes generic objects for the Layer 3 network interface sublayers. This MIB is an updated version of MIB-II's if table and incorporates the extensions defined in RFC2233.
12.1(4)CX
DOCS-IF-MIB.my
DOCS-IF-MIB-V1SMI.my
This module describes the DOCSIS-compliant Radio Frequency (RF) interfaces in CMs and the CMTS. This MIB has been released as an RFC2670.
12.1(4)CX
DOCS-BPI-PLUS-MIB.my1
DOCS-BPI-PLUS-MIB-V1SMI.my
This module describes the attributes for the DOCSIS 1.1-specified Baseline Privacy Interface Plus (BPI+) on CMs and the CMTS. This is revision 05 of the MIB.
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12.1(4)CX
CISCO-DOCS-EXT-MIB.my
CISCO-DOCS-EXT-MIB-V1SMI.my
This module extends the DOCSIS standard RFI MIB (DOCS-IF-MIB) with Cisco-specific extensions, such as QoS attributes and connection status and other information regarding the cable modems and CPE devices supported by the CMTS.
12.1(4)CX
CISCO-DOCS-REMOTE-QUERY-MIB.my
CISCO-DOCS-REMOTE-QUERY-MIB-V1SMI.my
This module facilitates SNMP polling of remote CMs on a CMTS.
12.1(4)CX
CISCO-CABLE-SPECTRUM-MIB.my
CISCO-CABLE-SPECTRUM-MIB-V1SMI.my
This module describes the spectrum management and flap list attributes.
12.1(4)CX
DOCS-QOS-MIB.my1
DOCS-QOS-MIB-V1SMI.my
This module describes the quality of service (QoS) attributes. This is revision 04 of the MIB.
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12.1(7)CX
DOCS-SUBMGT-MIB.my1
This module describes the subscriber management attributes. This is revision 02 of the MIB.
12.1(7)CX
RFC29331
This module describes the IGMP protocol attributes, as defined in RFC2933.
12.1(7)CX
DOCS-CABLE-DEVICE-MIB.my1
DOCS-CABLE-DEVICE-MIB-V1SMI.my
This module describers the operation of cable modem and CMTS. Only the syslog and Event tables are supported by this MIB, which was released as RFC2669.
12.1(7)CX
DOCS-CABLE-DEVICE-TRAP-MIB.my1
This is the extension of the RFC2669 (DOCS-CABLE-DEVICE-MIB). It defines all the traps supported by a cable modem and CMTS.
12.1(7)CX
DOCS-IF-EXT-MIB.my1
This is the extension of module of the RFC2670 (DOCS-IF-MIB).
12.1(7)CX
1 These MIBs are in draft form. They have not yet been finalized by the DOCSIS committee and are subject to change with future releases.
Deprecated MIBs
Old Cisco MIBs will be replaced in a future release. Currently, OLD-CISCO-* MIBs are being converted into more scalable MIBs without affecting existing Cisco IOS products or network management system (NMS) applications. You can update from deprecated MIBs to the replacement MIBs as shown in Table 8.
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Caveats
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious. Severity 3 caveats are moderate caveats, and only selected severity 3 caveats are included in the caveats document.
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious. Severity 3 caveats are moderate caveats.
All caveats in Cisco IOS Release 12.1 are also in Cisco IOS Release 12.1(7)CX.
For information on caveats in Cisco IOS Release 12.1, see Caveats for Cisco IOS Release 12.1. This document lists severity 1 and 2 caveats and only selected severity 3 caveats, and is located on Cisco.com and the Documentation CD-ROM.
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Open Caveats for Release 12.1(7)CX
This section documents possible unexpected behavior by Cisco IOS Release 12.1(7)CX and describes only severity 1 and severity 2 caveats and select severity 3 caveats.
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Slave interface in cable bundle is shut down on reload. After a CMTS running 12.1(7)CX is reloaded, slave interfaces in a cable bundle will be placed in shutdown state.
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Under certain conditions in Cisco IOS Release 12.1(7)CX, the spectrum group configuration commands must appear in the startup configuration file to activate the proactive channel hopping feature for the Cisco uBR-MC16S cable interface line card. If these commands are configured using the CLI after the Cisco uBR7200 series router has reloaded, the router performs only blind frequency hopping.
The problem occurs only when a fixed frequency has been specified using the cable upstream frequency command and the spectrum group commands are not in the startup configuration file. For example, if a fixed frequency has been configured in the startup configuration file, but CLI commands are then used after the router comes up to create the spectrum group configuration, the router will use blind hopping instead of proactive channel hopping.
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The workaround is to configure the spectrum group commands as desired, save the configuration to the NVRAM, and then reboot the router. The Cisco uBR-MC16S will then perform the proactive channel hopping among the frequencies that are in the spectrum groups assigned to the upstreams.
For example, after configuring the Cisco uBR7200 series router with the desired spectrum management commands, give the following commands in Privileged EXEC mode:
CMTS# copy running-config startup-configCMTS# reloadClosed and Resolved Caveats for Release 12.1(7)CX
All the caveats listed in this section are closed or resolved in Cisco IOS Release 12.1(7)CX. This section describes only severity 1 and severity 2 caveats and select severity 3 caveats.
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On a Cisco uBR7200 series router with CEF enabled, duplicate IP addresses might be given to hosts. This problem can be monitored via the show cable host access-group command. There is no workaround.
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When spectrum groups have been configured and assigned to an upstream port, the clear int cable x/y command might cause an unexpected system reload.
Workaround: Initially boot with a configuration file that assigns a fixed frequency to the upstream. Then manually assign the spectrum group to the upstream.
Open Caveats for Release 12.1(4)CX
This section documents possible unexpected behavior for Cisco IOS Release 12.1(4)CX and describes only severity 1 and severity 2 caveats and select severity 3 caveats.
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After a Cisco uBR7200 series router with an NPE-300 with 32 MB of processor memory installed (that is, 64 MB total memory) has reloaded and is generating the system-reload information, the software might read an invalid address, which causes the PCI bus to pause indefinitely and the watchdog to switch off. This will hide the real cause of the system reload.
Workaround: Disable the generation of system-reload information.
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On a Cisco uBR7200 series router with CEF enabled, duplicate IP addresses might be given to hosts. This problem can be monitored via the show cable host access-group command. There is no workaround.
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When spectrum groups have been configured and assigned to an upstream port, the clear int cable x/y command might cause an unexpected system reload.
Workaround: Initially boot with a configuration file that assigns a fixed frequency to the upstream. Then manually assign the spectrum group to the upstream.
Closed and Resolved Caveats for Release 12.1(4)CX
Because Cisco IOS Release 12.1(4)CX is the initial release for the Cisco uBR7200 series routers, there are no closed or resolved caveats that require documentation in the release notes.
Related Documentation
The following sections describe the documentation available for the Cisco uBR7200 series. These documents consist of hardware and software installation guides, Cisco IOS configuration guides 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 these documents:
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Release-Specific Documents
The following documents are specific to Release 12.1 and are located on Cisco.com and the Documentation CD-ROM:
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Technical Documents
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On Cisco.com, beginning under the Service & Support heading:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Caveats: Caveats for Release 12.1
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats
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Platform-Specific Documents
The following documents are available for the Cisco uBR7200 series universal broadband routers on Cisco.com and the Documentation CD-ROM:
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On Cisco.com, beginning under the Service & Support heading:
Technical Documents: Documentation Home Page: Broadband/Cable Solutions: Cisco uBR7200 Series Universal Broadband Routers
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Technical Documents: Documentation Home Page: Broadband/Cable SolutionsOn the Documentation CD-ROM:
Cisco Product Documentation: Broadband/Cable Solutions: Cisco uBR7200 Series Universal Broadband Routers
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Cisco Product Documentation: Broadband/Cable Solutions
Tips
http://www.cisco.com/univercd/cc/td/doc/product/cable/cab_r_sw/index.htm
Feature Modules
Feature modules describe new software enhancements, committed as features, supported by Cisco IOS Release 12.1(7)CX and are updates to the Cisco IOS documentation set. A feature module consists of a brief overview of the feature, benefits, and configuration tasks, and a command reference. As updates, the feature modules are available online only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set.
On Cisco.com, beginning under the Service & Support heading:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation: New Features in Release 12.1 T
Feature Navigator
Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a particular set of features and which features are supported in a particular Cisco IOS image.
Feature Navigator is available 24 hours a day, 7 days a week. To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, e-mail the Contact Database Administration group at cdbadmin@cisco.com. If you do not have an account on Cisco.com, go to http://www.cisco.com/register and follow the directions to establish 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. It contains feature information about mainline-, T-, S-, and P-trains. 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.
On Cisco.com and the Documentation CD-ROM, two master hot-linked documents provide information for the Cisco IOS software documentation set.
On Cisco.com, beginning under the Service & Support heading:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References
On the Documentation CD-ROM:
Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References
Release 12.1 Documentation Set Contents
Table 9 lists the contents of the Cisco IOS Release 12.1 software documentation set, which is available in electronic form, and also in printed form upon request.
Note
On Cisco.com, beginning under the Service & Support heading:
Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References
On the Documentation CD-ROM:
Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References
Note
Obtaining Documentation
The following sections provide sources for obtaining documentation from Cisco Systems.
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at 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 may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Ordering Documentation
Cisco documentation is available in the following ways:
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http://www.cisco.com/public/ordsum.html
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http://www.cisco.com/go/subscription
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Documentation Feedback
If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.
You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:
Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC web site.
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 web site:
http://www.cisco.com
Technical Assistance Center
The Cisco TAC web site 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 Web Site
If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC web site:
http://www.cisco.com/tac
P3 and P4 level problems are defined as follows:
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In each of the above cases, use the Cisco TAC web site to quickly find answers to your questions.
To register for Cisco.com, go to the following web site:
http://www.cisco.com/register/
If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following web site:
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 web site:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
P1 and P2 level problems are defined as follows:
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