Cisco Cable Modem Termination System Feature Guide September 2004 Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 Text Part Number: 0L-1467-04 THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. CCSP, the Cisco Square Bridge logo, Cisco Unity, Follow Me Browsing, FormShare, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, Registrar, ScriptShare, SlideCast, SMARTnet, StrataView Plus, SwitchProbe, TeleRouter, The Fastest Way to Increase Your Internet Quotient, TransPath, and VCO are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries. All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0406R) Cisco Cable Modem Termination System Feature Guide Copyright © 2001-2004, Cisco Systems, Inc. All rights reserved. CONTENTS Preface xv Purpose xv Audience xvi Document Organization xvi Conventions xviii Terms and Acronyms xix Related Documentation xix Cisco uBR Series Documentation xix Additional Documentation Resources xx Obtaining Documentation xx Cisco.com xx Documentation CD-ROM xxi Ordering Documentation xxi Documentation Feedback xxi Obtaining Technical Assistance xxi Cisco TAC Website xxii Opening a TAC Case xxii TAC Case Priority Definitions xxii Obtaining Additional Publications and Information xxiii Cable Interface Bundling for the Cisco CMTS 1 Contents 2 Prerequisites for Cable Bundling 2 Restrictions for Cable Bundling 2 Information About Cable Bundling 3 Benefits 4 Configuring Cable Bundling 4 Monitoring Cable Interface Bundling 7 Configuration Examples for Cable Interface Bundling 9 Basic Cable Interface Bundling Example 9 Additional References 10 Related Documents 10 Standards 11 MIBs 11 Cisco Cable Modem Termination System Feature Guide 0L-1467-04 iii Contents RFCs 12 Technical Assistance 12 Cable Monitor and Intercept Features for the Cisco CMTS 13 Contents 14 Prerequisites for Cable Monitor and Intercept 14 Restrictions for Cable Monitor and Intercept 14 Information About Cable Monitor and Intercept 14 Overview of the cable interface Command 15 Overview of the cable monitor Command 15 Benefits 17 How to Configure for Cable Intercept and Monitoring 17 Configuring the cable intercept Command 17 Configuring the cable monitor Command 19 Monitoring the Cable Intercept and Monitor Features 21 Displaying Information About Intercepted Traffic 21 Displaying Information About Monitored Traffic 21 DOCSIS Data Packets Example 22 Timestamped Packets Example 22 Configuration Examples 23 Cable Intercept Configuration Example 23 Cable Monitor Configuration Example (MAC Address) 23 Cable Monitor Configuration Example (Ethernet, MAC-Layer, and DOCSIS-Data Packets) 24 Additional References 24 Related Documents 24 Standards 25 MIBs 25 RFCs 25 Technical Assistance 26 DHCP, ToD, and TFTP Services for the Cisco CMTS 27 Contents 28 Prerequisites for DHCP, ToD, and TFTP Services 28 Restrictions for DHCP, ToD, and TFTP Services 28 Information About DHCP, ToD, and TFTP Services 29 Feature Overview 29 Internal DHCP Server 30 Cisco Cable Modem Termination System Feature Guide iv 0L-1467-04 Contents External DHCP Servers 32 Time-of-Day Server 33 TFTP Server 35 Benefits 36 How to Configure DHCP, ToD, and TFTP Services 37 Configuring DHCP Service 37 Configuring Time-of-Day Service 43 Configuring TFTP Service 45 Configuring A Basic All-in-One Configuration (optional) 48 Configuring an Advanced All-in-One Configuration (optional) 49 Optimizing the Use of an External DHCP Server 49 Configuration Examples 55 DHCP Server Examples 55 ToD Server Example 57 TFTP Server Example 57 Basic All-in-One Configuration Example 58 Advanced All-in-One Configuration Example 62 Additional References 68 Related Documents 68 Standards 70 MIBs 71 RFCs 71 Technical Assistance 71 Configuring DOCSIS 1.1 on the Cisco CMTS 73 Contents 74 Prerequisites for DOCSIS 1.1 Operations 74 Restrictions for DOCSIS 1.1 Operations 75 Information about DOCSIS 1.1 78 Feature Overview 78 DOCSIS 1.1 Quality of Service 80 Benefits 86 How to Configure the Cisco CMTS for DOCSIS 1.1 Operations 87 Configuring Baseline Privacy Interface (optional) 88 Downloading the DOCSIS Root Certificate to the CMTS (required) 91 Adding a Manufacturer’s Certificate as a Trusted Certificate (optional) 94 Adding a Manufacturer’s or CM Certificate to the Hotlist (required) 96 Cisco Cable Modem Termination System Feature Guide 0L-1467-04 v Contents Enabling Concatenation (optional) 99 Enabling DOCSIS Fragmentation (optional) 100 Monitoring DOCSIS Operations 101 Monitoring the DOCSIS Network 101 Monitoring the RF Network and Cable Interfaces 107 Monitoring BPI+ Operations 111 Command Summary 114 Configuration Examples for DOCSIS 1.1 Operations 115 DOCSIS 1.1 Configuration for Cisco uBR7246VXR Router (without BPI+) 115 DOCSIS 1.1 Configuration for Cisco uBR7246VXR Router (with BPI+) 117 DOCSIS 1.1 Configuration for Cisco uBR10012 Router (with BPI+) 121 Additional References 125 Related Documents 125 Standards 126 MIBs 127 RFCs 127 Technical Assistance 127 EtherChannel for the Cisco Cable Modem Termination System 129 Contents 130 Prerequisites for EtherChannel on the Cisco CMTS 130 Restrictions for EtherChannel on the Cisco CMTS 131 Information About EtherChannel on the Cisco CMTS 131 Introduction to EtherChannel on the Cisco CMTS 131 Cisco FastEtherChannel (FEC) and GigabitEtherChannel (GEC) on the Cisco uBR7246VXR Router 132 Cisco GigabitEtherChannel (GEC) on the Cisco uBR10012 Router 132 How to Configure EtherChannel on the Cisco CMTS 133 Configuring FEC or GEC EtherChannel on the Cisco CMTS 133 Verifying EtherChannel on the Cisco CMTS 136 Configuration Examples for EtherChannel on the Cisco CMTS 136 Additional References 140 Related Documents 140 Standards 142 MIBs 142 Technical Assistance 142 Command Reference for EtherChannel on the Cisco CMTS 143 Glossary 149 Cisco Cable Modem Termination System Feature Guide vi 0L-1467-04 Contents Flap List Troubleshooting for the Cisco CMTS 151 Contents 152 Prerequisites for Flap List Troubleshooting 152 Restrictions for Flap List Troubleshooting 152 Information About Flap List Troubleshooting 152 Feature Overview 153 Information in the Flap List 153 Cisco Cable Manager and Cisco Broadband Troubleshooter 154 Benefits 155 How to Configure Flap List Troubleshooting 155 Configuring Flap List Operation Using the CLI (optional) 155 Clearing the Flap List and Counters Using the CLI (optional) 157 Enabling or Disabling Power Adjustment Using the CLI (optional) 158 Configuring Flap List Operation Using SNMP (optional) 161 Clearing the Flap List and Counters Using SNMP (optional) 161 How to Monitor and Troubleshoot Using Flap Lists 162 Displaying the Flap List Using the show cable flap-list Command 162 Displaying the Flap List Using the show cable modem flap Command 166 Displaying the Flap List Using SNMP 166 Displaying Flap-List Information for Specific Cable Modems 167 Troubleshooting Suggestions 169 Configuration Examples for Flap List Troubleshooting 171 Additional References 172