Chapter 6. Multiprotocol BGP

The previous chapters demonstrate how BGP, a simple protocol in its basic functionality, uses route attributes and various configuration options to support complex routing policies. You have also seen how the scaling features of BGP allow it to be the core routing protocol for many large networks including the Internet. All the examples you have seen so far are for routing IPv4. This chapter shows how BGP is extended to route for other protocols—specifically, how it is extended to carry the NLRI for address families other than IPv4.

The BGP extensions enabling it to carry additional address families make it Multiprotocol BGP, abbreviated as MBGP, M-BGP, or MP-BGP. (This book uses the acronym MBGP because it has the ...

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