Cisco BGP-4 Command and Configuration Handbook

Overview

The comprehensive, hands-on guide to all Cisco IOS(r) Software BGP-4 commands

  • The complete BGP-4 command reference
  • invaluable for network designers, engineers, and architects
  • Provides configuration, troubleshooting, and verification scenarios for every possible BGP-4 command supported by Cisco IOS Software that can be implemented on a ...
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Overview

The comprehensive, hands-on guide to all Cisco IOS(r) Software BGP-4 commands

  • The complete BGP-4 command reference
  • invaluable for network designers, engineers, and architects
  • Provides configuration, troubleshooting, and verification scenarios for every possible BGP-4 command supported by Cisco IOS Software that can be implemented on a minimum number of routers
  • Groups BGP-4 commands by area of implementation route aggregation, auto-summary, route filtering, and route advertisement, just to name a few
  • Provides clear and concise commentary on the initial release, purpose, syntax, and usage of each BGP-4 command
  • Offers excellent CCIE certification preparation from one of the CCIE Program Managers
  • Includes supplementary information on regular expressions, route map logic, and RFC 1771, A Border Gateway Protocol 4 (BGP-4)

Cisco BGP-4 Command and Configuration Handbook is an exhaustive practical reference to the commands contained within BGP-4. For each command/subcommand, author Bill Parkhurst explains the intended use or function and how to properly configure it. Then he presents scenarios to demonstrate every facet of the command and its use, along with appropriate show and debug commands. Through the discussion of functionality and the scenario-based configuration examples, Cisco BGP-4 Command and Configuration Handbook will help you gain a thorough understanding of the practical side of BGP-4.

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Product Details

  • ISBN-13: 9781587055737
  • Publisher: Cisco Press
  • Publication date: 5/11/2001
  • Series: CCIE Professional Development Series
  • Edition description: New Edition
  • Pages: 400
  • Product dimensions: 7.30 (w) x 9.00 (h) x 0.80 (d)

Meet the Author

William R. Parkhurst, Ph.D., CCIE #2969, is the manager of the CCIE Development group at Cisco Systems. The CCIE Development group is responsible for all new CCIE written qualification and laboratory exams. Prior to joining the CCIE team, Bill was a Consulting Systems Engineer supporting the Sprint Operation. Bill first became associated with Cisco Systems while he was a Professor of Electrical and Computer Engineering at Wichita State University. In conjunction with Cisco Systems, WSU established the first CCIE Preparation Laboratory.

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Table of Contents


1. Route Aggregation.

aggregate-address address mask.

2. Auto-Summary.

auto-summary.

3. BGP-Specific Commands.

bgp always-compare-med. bgp bestpath as-path ignore. bgp bestpath med confed. bgp bestpath med missing-as-worst. bgp client-to-client reflection. bgp cluster-id 32-bit_id. bgp confederation identifier AS-number. bgp confederation peers 1_or_more_AS-numbers. bgp dampening. bgp dampening half-life. bgp dampening half-life reuse suppress max-suppress-time. bgp dampening route-map route-map-name. bgp default local-preference local-preference. bgp deterministic-med. bgp fast-external-fallover. bgp log-neighbor-changes. bgp router-id ip-address.

4. Default Information.

default-information originate. default-metric metric.

5. BGP Administrative Distance.

distance admin-distance ip-source-address ip-address-mask. distance admin-distance ip-source-address ip-address-mask ip-access-list-number. distance bgp external internal local.

6. BGP Route Filtering.

distribute-list.

7. BGP Maximum Paths.

maximum-paths number-of-paths.

8. Neighbor Configuration.

neighbor {ip-address peer-group-name} advertise-map route-map-name1 non-exist-map route-map-name2. neighbor {ip-address peer-group-name} advertisement-interval seconds. neighbor {ip-address peer-group-name} default-originate. neighbor {ip-address peer-group-name} description text. neighbor {ip-address peer-group-name} distribute-list. neighbor {ip-address peer-group-name} ebgp-multihop maximum-hop-count. neighbor {ip-address peer-group-name} filter-list as-path-list-number in. neighbor {ip-address peer-group-name} filter-list as-path-list-number out. neighbor {ip-address peer-group-name} filter-list as-path-list-number weight weight. neighbor {ip-address peer-group-name} maximum-prefix prefix-limit. neighbor {ip-address peer-group-name} maximum-prefix prefix-limit warning-only. neighbor {ip-address peer-group-name} maximum-prefix prefix-limit threshold-value. neighbor {ip-address peer-group-name} maximum-prefix prefix-limit threshold-value warning-only. neighbor {ip-address peer-group-name} next-hop-self. neighbor {ip-address peer-group-name} password. neighbor peer-group-name peer-group. neighbor ip-address peer-group peer-group-name.

9. Route Advertisement.

network ip-address.

10. Route Redistribution.

redistribute protocol. redistribute protocol metric metric. redistribute protocol route-map route-map-name. redistribute protocol route-map route-map-name metric metric. redistribute protocol weight weight.

11. Address Summarization.

summary-address.

12. Synchronization.

synchronization.

13. BGP Timers.

timers bgp keepalive holdtime.

14. BGP show Commands.

show ip bgp. show ip bgp begin line. show ip bgp prefix. show ip bgp community community-number(s). show ip bgp community-list community-list-number. show ip bgp dampened-paths. show ip bgp filter-list as-path-access-list. show ip bgp filter-list as-path-access-list begin line. show ip bgp filter-list as-path-access-list exclude line. show ip bgp filter-list as-path-access-list include line. show ip bgp flap-statistics. show ip bgp flap-statistics prefix/mask-length. show ip bgp flap-statistics prefix. show ip bgp flap-statistics prefix mask. show ip bgp flap-statistics prefix mask longer-prefixes. show ip bgp flap-statistics filter-list list-number. show ip bgp flap-statistics quote-regexp quoted-line. show ip bgp flap-statistics regexp regular-expression. show ip bgp inconsistent-as. show ip bgp neighbors. show ip bgp neighbors ip-address advertised-routes. show ip bgp neighbors ip-address dampened-routes. show ip bgp neighbors ip-address flap-statistics. show ip bgp neighbors ip-address paths. show ip bgp neighbors ip-address paths line. show ip bgp neighbors ip-address received-routes. show ip bgp neighbors ip-address routes. show ip bgp paths. show ip bgp paths line. show ip bgp paths begin line. show ip bgp paths exclude line. show ip bgp paths include line. show ip bgp peer-group. show ip bgp peer-group peer-group-name.

15. BGP clear Commands.

clear ip bgp
• . clear ip bgp
• soft. clear ip bgp
• soft in. clear ip bgp
• soft out. clear ip bgp
• soft in out. clear ip bgp AS-number. clear ip bgp AS-number soft. clear ip bgp AS-number soft in. clear ip bgp AS-number soft out. clear ip bgp AS-number soft in out. clear ip bgp neighbor-ip-address. clear ip bgp peer-group peer-group-name. clear ip bgp dampening. clear ip bgp dampening prefix mask. clear ip bgp flap-statistics. clear ip bgp flap-statistics prefix mask. clear ip bgp flap-statistics filter-list list-number. clear ip bgp flap-statistics regexp regular-expression. clear ip bgp neighbor-ip-address flap-statistics.

16. BGP debug Commands.

debug ip bgp. debug ip bgp neighbor-ip-address updates. debug ip bgp neighbor-ip-address updates access-list-number. debug ip bgp dampening. debug ip bgp dampening access-list-number. debug ip bgp events. debug ip bgp keepalives. debug ip bgp in neighbor-ip-address updates. debug ip bgp in neighbor-ip-address updates access-list-number. debug ip bgp out neighbor-ip-address updates. debug ip bgp out neighbor-ip-address updates access-list-number. debug ip bgp updates. debug ip bgp updates in. debug ip bgp updates out. debug ip bgp updates access-list-number. debug ip bgp updates access-list-number in. debug ip bgp updates access-list-number out.

Appendix A: RFC 1771: Border Gateway Protocol 4 (BGP-4).

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  • Anonymous

    Posted March 10, 2004

    The BGP-4 Bible

    The Cisco BGP-4 Command and Configuration Handbook has become another valuable addition to my networking library. This reference by Dr. William Parkhurst is a comprehensive listing of all BGP-4 commands used in Cisco IOS software. Like his reference on OSPF commands, each BGP command is outlined with a syntax description, a purpose for the command, configuration examples and a short troubleshooting section. The flow of the book was very logically laid out. It begins with basic BGP route aggregation commands and progresses through neighbor configuration commands, route redistribution and ends with chapters on troubleshooting commands. Each chapter begins with basic commands and builds on those commands as the chapter progresses. This way the reader gets a feeling for how each command interacts with other commands. As with any other command and configuration handbook, the reader must be well versed in the theory behind the technology. This is especially true with this book. I must admit, that before reading this book, I did not have much exposure to BGP-4, but I found the material very easy to comprehend. It also helped me to understand the protocol better. Without the proper background in BGP-4 you can get lost very easily, however if you have had exposure to BGP then you will find this book very useful in configuring the protocol. Another aspect of the book I really liked was in how the configuration examples were presented. Each example had a network scenario and gave a step by step process on how to utilize the command. A network diagram was included along with outputs from the routers used in the configuration scenario. The configuration examples start with a verification phase where the correct operation is determined. Then the command is applied and the changes are outlined and displayed. The troubleshooting section outlines steps where the most common failures may occur. While the reader can get a lot of information from just reading the configuration section, it really helps if you can have access to live routers. I also found the appendices very helpful in understanding some of the book¿s content. Appendix A presents the concepts and terminology contained in RFC 1771 Border Gateway Protocol 4. Appendix B covers regular expression and Appendix C is about route map logic and how route maps are used in BGP-4. Don¿t be daunted by Appendix A, the author left out most of the details, like packet format and content and instead focused on BGP attributes, path selection and forming BGP connections. Appendix C gave a good refresher on route maps and how they are utilized in BGP. This book has become an excellent reference source for my studies toward the CCIE. It also helped me to understand BGP better. I would highly recommend this book to anyone studying for Cisco certification or who has to work with BGP-4 in their network. I looked forward to reading more books by Dr. Parkhurst

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