July 2004
Intermediate to advanced
448 pages
10h 7m
English
Content preview from Practical BGP
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Chapter 6. BGP Policy
While BGP provides routing information (information about the reachable destinations of prefixes and the loop-free paths available to reach them), it uses policy—rather than proximity—to determine which path is the best one to reach a given destination. This chapter describes the various policies a network administrator can configure to manipulate BGP attributes and the best path BGP will select. We also discuss where these attributes are normally derived from and some common uses for each of them. We'll complete this chapter with an extensive discussion of multiexit discriminator (MED) deployment considerations, many of which are directly influenced by a network operator's BGP policies.
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