Cisco 7246VXR - uBR Router Manuale utente

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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

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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

Contents

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

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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

Contents

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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

Contents

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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

Contents

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

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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

Contents

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

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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

Contents

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

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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

NDEX

Contents

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

OL-2239-04

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