Chapter 4. Designing Large-Scale IP Networks with BGP
Edited by Atif Khan
The Border Gateway Protocol (BGP) is an interautonomous system routing protocol. The primary function of a BGP-speaking system is to exchange network reachability information with other BGP systems. This network reachability information includes the list of autonomous systems (ASs) that reachability information traverses. BGP4 provides a set of mechanisms for supporting classless interdomain routing. These mechanisms include support for advertising an IP prefix and eliminate the concept of network class within BGP. BGP4 also introduces mechanisms that allow aggregation of routes, including aggregation of AS paths. These changes provide support for the proposed supernetting ...
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