BGP Support for IPv6
The predominant routing protocol found on the Internet is Border Gateway Protocol (BGP), as discussed in Chapter 13, “Fundamental BGP Concepts,” and Chapter 14, “Advanced BGP Concepts.” A challenge with traditional BGP version 4 (BGP-4) is that it only supported the routing of IPv4 networks. Fortunately, an update to BGP, called Multiprotocol BGP (MP-BGP), allows BGP to support multiple address types. This update consists of a set of multiprotocol extensions added to BGP-4.
This section begins by introducing MP-BGP and discussing its new components. Then, you will see how IPv6 networks can be routed across an IPv4 BGP session, in addition to an IPv6 session. Next, from a design perspective, this section contrasts the benefits ...
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