The global Internet routing infrastructure is built using BGP. To make BGP-4 available for other network layer protocols, including IPv6, multiprotocol extensions for BGP-4 (MP-BGP) was introduced.
RFC 4760, Multiprotocol Extensions for BGP-4, defines multiprotocol extensions for BGP-4 (MP-BGP). RFC 2545, Use of BGP-4 Multiprotocol Extensions for IPv6 Inter-Domain Routing, defines how these extensions are used for IPv6.
MP-BGP is capable of carrying a rich set of routed protocols, including IPv4 and IPv6, over a transport protocol, such as IPv4 or IPv6.
This section covers the following topics:
MP-BGP support for IPv6
Exchanging IPv6 routes over an IPv4 session
Exchanging IPv6 routes ...