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Implementing Cisco IP Routing (ROUTE) Foundation Learning Guide: Foundation Learning for the ROUTE 642-902 Exam by Diane Teare

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Appendix C. BGP Supplement

This appendix contains supplementary Border Gateway Protocol (BGP) information and covers the following topics:

BGP Route Summarization

Redistribution with IGPs

Communities

Route Reflectors

This appendix provides you with some additional information about the Border Gateway Protocol (BGP).

BGP Route Summarization

This section reviews classless interdomain routing (CIDR) and describes how BGP supports CIDR and summarization of addresses. Both the network and aggregate-address commands are described.

CIDR and Aggregate Addresses

As discussed in Appendix B, “IPv4 Supplement,” CIDR is a mechanism developed to help alleviate the problem of exhaustion of IP addresses and the growth of routing tables. The idea ...

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