November 1999
Intermediate to advanced
576 pages
15h 3m
English
A BGP router may receive paths for the same route from many neighbors. How the best path is selected is a matter of local policy. The policy within an AS must be consistent; otherwise, routing loops could occur. Conceptually, the policy and decision process is shown in Figure 11-16.
An incoming Routing Information Base is maintained for each peer. Incoming policy is applied to each RIB, and complying routes are passed as candidates to the BGP decision-making process. The best paths are offered as candidates to the IP forwarding table and ...
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