Cisco 7246VXR - uBR Router User manual

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Cisco uBR7200 Series Universal
Broadband Router Software
Configuration Guide
Cisco IOS® Software 12.3 BC, 12.2 BC, 12.2CX, 12.1 EC
May 2009
Text Part Number: OL-2239-05

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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
Copyright © 2004–2009 Cisco Systems, Inc. All rights reserved.

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CONTENTS
Preface 11
Document Revision History 1-11
Document Objectives 1-11
Audience 1-12
Document Organization 1-12
Conventions 1-13
Terms and Acronyms 1-14
Related Documentation 1-17
Cisco uBR7200 Series Documentation 1-17
Cisco Cable Modem Termination System Reference Documentation 1-18
Related Cisco IOS Release Documentation 1-18
CHAPTER 1Overview of Cisco uBR7200 Series Software 1-1
Cisco IOS Releases and Images for the Cisco uBR7200 Series 1-2
Determining Your Cisco IOS Software Release 1-2
Upgrading to a New Software Release 1-2
12.3 BC Release Train Images and Requirements 1-3
12.2 BC Release Train Images and Requirements 1-4
12.2 CX Images and Requirements 1-5
12.1 EC Images and Requirements 1-7
Cisco uBR7200 Series Chassis Overview 1-8
Cisco uBR7200 Series Universal Broadband Routers 1-9
Supported Hardware on the Cisco uBR7200 Series 1-11
System Interoperability 1-14
Cisco uBR7200 Series Router Configuration Overview 1-15
Port Adapter and Line Card Slot and Logical Interface Numbering 1-15
MAC-Layer Addressing 1-17
Cable Interface Line Cards 1-17
Cable Interface Line Card Slots 1-19
Interfaces and Physical Ports 1-20
Port Adapter Slots 1-20
Supported Software Features for the Cisco uBR7200 Series 1-22
Cisco uBR7200 Series Router Features and Cisco IOS Releases 1-22
Cisco uBR7200 Series Router Configuration Tools 1-31

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Bandwidth Management Features 1-33
Cisco IOS Command-Line Enhancements 1-33
Cisco Quality of Service Features 1-45
DHCP Servers and Feature Support 1-47
DOCSIS 1.0 Feature Support 1-49
DOCSIS 1.0+ Feature Support 1-56
DOCSIS 1.1 Feature Support 1-57
DOCSIS 2.0 Feature Support 1-67
High Availability Features 1-68
Intercept Features 1-72
IP Broadcast and Multicast Features 1-79
IP Routing Features 1-80
Management Features 1-86
Multicast Features 1-96
PacketCable and Voice Support Features 1-101
Security Features 1-102
SNMP Features and Enhancements 1-109
Spectrum Management and Advanced Spectrum Management Features 1-119
Testing, Troubleshooting and Diagnostic Features 1-123
Virtual Interfaces 1-125
VLAN Features 1-126
VPN and Layer 2 Tunneling Features 1-126
WAN Optimization and Services Features 1-131
DOCSIS and CMTS Interoperability 1-137
DOCSIS NTSC Cable Plants 1-137
EuroDOCSIS Cable Plants 1-138
DOCSIS-Compliant Downstream Signals 1-139
DOCSIS-Compliant Upstream Signals 1-140
Traffic Engineering 1-142
CHAPTER 2Configuring the Cable Modem Termination System for the First Time 2-1
Configuration Fundamentals for the Cisco uBR7200 Series 2-2
Preconfiguring the Cisco uBR7200 Series 2-2
Booting and Logging onto the Cisco uBR7200 Series 2-5
Setting Password Protection on the Cisco uBR7200 Series 2-5
Recovering Passwords on the Cisco uBR7200 Series 2-6
Configuring the Cisco uBR7200 Series Using AutoInstall 2-10
Autoinstall Requirements 2-10
Understanding AutoInstall 2-11

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Preparing for the AutoInstall Process 2-11
Performing the AutoInstall Procedure 2-12
Setting Up the TFTP Server for Autoinstall 2-15
Setting Up the BOOTP or RARP Server for Autoinstall 2-16
Connecting the New Router to the Network 2-16
Configuring the Cisco uBR7200 Series Using the Setup Facility 2-17
Introduction to the Setup Facility 2-17
Configuring Global Parameters with the Setup Facility 2-18
Configuring Upstream Frequencies with the Setup Facility 2-21
Configuring Interfaces with the Setup Facility 2-22
Configuring the Cable Interface with the Extended Setup Facility 2-25
Identifying the Cable Interface Line Card 2-25
Configuring Global Parameters in Extended Setup 2-26
Configuring the Cisco uBR7200 Series Manually Using Configuration Mode 2-27
Saving Your Configuration Settings 2-29
Reviewing Your Settings and Configurations 2-29
Viewing Sample Configuration Files 2-29
CHAPTER 3Configuring Cable Modem Interface Features 3-1
Configuring the Downstream Cable Modem Interface 3-2
Activating Downstream Cable Address Resolution Protocol Requests 3-2
Activating Downstream Ports 3-3
Setting the Integrated Upconverter 3-4
Assigning the Downstream Channel ID 3-5
Configuring Downstream Rate Limiting and Traffic Shaping 3-6
Setting the Downstream Helper Address 3-7
Setting the Downstream Interleave Depth 3-8
Setting the Downstream Modulation 3-8
Setting the Downstream MPEG Framing Format 3-9
Setting Downstream Traffic Shaping 3-10
Configuring the Upstream Cable Modem Interface 3-11
Activating Upstream Admission Control 3-12
Activating Upstream Differential Encoding 3-13
Activating Upstream Forward Error Correction 3-14
Activating the Upstream Ports 3-15
Activating Upstream Frequency Adjustment 3-15
Activating Upstream Power Adjustment 3-16
Activating the Upstream Scrambler 3-17
Activating Upstream Timing Adjustment 3-17

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Configuring Upstream Rate Limiting and Traffic Shaping 3-18
Setting Upstream Backoff Values 3-19
Setting the Upstream Channel Width 3-21
Setting the Upstream Frequency 3-22
Setting the Upstream Input Power Level 3-24
Specifying Upstream Minislot Size 3-25
Setting Upstream Traffic Shaping 3-26
Configuring Optional Cable Modem Interface Features 3-28
Activating Host-to-Host Communication (Proxy ARP) 3-28
Activating Packet Intercept Capabilities 3-29
Configuring Cable Subinterfaces 3-29
Configuring and Monitoring Cable Interface Bundling 3-30
Configuring Payload Header Suppression and Restoration 3-33
Setting Optional IP Parameters (Broadcast and Multicast Echo) 3-33
Activating IP Multicast Echo 3-33
Activating IP Broadcast Echo 3-34
CHAPTER 4Configuring DOCSIS Baseline Privacy Interface on the Cisco uBR7200 Series 4-1
Baseline Privacy Interface Overview 4-1
BPI Key Management 4-2
Differentiating Traffic Streams 4-3
CM Communication with BPI 4-3
Enabling DOCSIS BPI 4-3
DOCSIS 1.1 Baseline Privacy Interface Plus Overview 4-4
CHAPTER 5Managing Cable Modems on the Hybrid Fiber-Coaxial Network 5-1
Activating Cable Modem Authentication 5-2
Activating Cable Modem Insertion Interval 5-3
Activating Cable Modem Upstream Address Verification 5-4
Clearing Cable Modem Counters 5-5
Clearing Cable Modem Reset 5-5
Configuring Cable Modem Registration Timeout 5-6
Configuring Dynamic Contention Algorithms (Cable Insertion Interval, Range, and Data Backoff) 5-6
cable insertion-interval Command Examples 5-6
Configuring the Dynamic Map Advance Algorithm 5-7
Configuring Maximum Hosts Attached to a Cable Modem 5-8
Configuring Per-Modem Filters 5-8

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Configuring Sync Message Interval 5-9
CHAPTER 6Configuring Basic Broadband Internet Access 6-1
Overview of Basic Broadband Internet Access 6-1
Recommended Basic Configuration for High-Speed Internet Access 6-2
Basic Internet Access Sample Configuration File 6-3
CHAPTER 7Overview of the Cisco Network Registrar for the Cisco uBR7200 Series 7-1
Cisco Network Registrar Description 7-1
Cable Modem DHCP Response Fields 7-2
DOCSIS DHCP Fields 7-2
DHCP Relay Option (DOCSIS Option 82) 7-2
Overview of Scripts 7-3
Two-way Cable Modem Scripts 7-3
Telco Return Cable Modem Scripts 7-3
Placement of Scripts 7-3
Windows NT 7-3
Solaris 7-3
Activate Scripts in Cisco Network Registrar 7-4
Configuring the Cisco uBR7200 Series to Use Scripts 7-4
Configure the System Default Policy 7-5
Cable Modems 7-5
PCs 7-5
Create Selection Tag Scopes 7-5
General 7-5
Telco Return 7-6
Create Network Scopes 7-6
Create Policies for Class of Service or for Upgrading Cable Modem Cisco IOS Images 7-7
CNR Steps to Support Subinterfaces 7-7
CHAPTER 8Troubleshooting the System 8-1
Understanding show Command Responses 8-2
Using a Headend Cable Modem to Verify Downstream Signals 8-6
Performing Amplitude Averaging 8-7
Enabling or Disabling Power Adjustment 8-7
Setting Downstream Test Signals 8-9
Configuring Unmodulated Test Signals 8-9

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Configuring PRBS Test Signals 8-10
Verifying Test Signal Output 8-10
Pinging Unresponsive Cable Modems 8-10
Pinging a Cable Modem 8-10
Verifying the Ping 8-10
Using Cable Interface debug Commands 8-11
debug cable arp 8-11
debug cable error (for MAC Protocol Errors) 8-11
debug cable keyman (for Baseline Privacy Activity) 8-12
debug cable mac-messages 8-12
debug cable map 8-12
debug cable phy 8-12
debug cable privacy (for Baseline Privacy) 8-13
debug cable qos 8-13
debug cable range (for Ranging Messages) 8-13
debug cable receive (for Upstream Messages) 8-13
debug cable reg (for Modem Registration Requests) 8-14
debug cable reset (for Reset Messages) 8-14
debug cable specmgmt (for Spectrum Management) 8-14
debug cable startalloc (for Channel Allocations) 8-14
debug cable transmit (for CMTS Transmissions) 8-15
debug cable ucc (for Upstream Channel Change Messages) 8-15
debug cable ucd (for Upstream Channel Description Messages) 8-15
APPENDIX AInstalling or Upgrading Cisco IOS Software A-1
Introduction A-1
Before You Begin A-1
Installing or Upgrading Cisco IOS Software A-2
Sample Output—Cisco uBR7200 Series Router A-3
Related Information A-3
Copying a System Image from One Device to Another A-4
Copying from Device to Device Inside the Same Router A-4
Copying from One Router to Another A-4
APPENDIX BResolving Common Image Installation Problems B-1
Before You Begin B-1
Resolving Default Gateway Issues B-1
Troubleshooting Problems During Software Transfer B-3
Troubleshooting Problems by Verifying the Software Image B-5

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APPENDIX CViewing Sample Configuration Files C-1
Basic Internet Access Examples C-1
Virtual Private Network (VPN) Example C-9
IP Telephony Example C-12
Telco Return Example C-14
APPENDIX DFrequency Allocation for the Cisco uBR7200 Series Universal Broadband Routers D-1
APPENDIX EConfiguration Register Information for the Cisco uBR7200 Series Universal Broadband
Routers E-1
Configuration Bit Meanings E-1
Bits 0–3 E-2
Bit 6 E-3
Bit 7 E-3
Bit 8 E-3
Bit 10 and Bit 14 E-4
Bit 11 and Bit 12 E-4
Bit 13 E-5
Bit 15 E-5
Displaying the Configuration Register While Running Cisco IOS E-5
Displaying the Configuration Register While Running ROM Monitor E-6
Setting the Configuration Register While Running Cisco IOS E-6
Setting the Configuration Register While Running ROM Monitor E-7
I NDEX

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