Multiprotocol BGP

Multiprotocol BGP (MBGP), which is also known as BGP4+, is an enhanced BGP that supports more than just IPv4 unicast routes. In this release, MBGP supports:

• IPv4 unicast routing and IPv4 multicast routing on the platforms listed for this feature in the Switch Engine 32.2 Feature License Requirements document.
• IPv6 unicast routing and IPv6 multicast routing on the platforms listed for this feature in the Switch Engine 32.2 Feature License Requirements document.
• Layer 3 VPN routing on the platforms listed for this feature in the Switch Engine 32.2 Feature License Requirements document..

MBGP support for separate unicast and multicast routing tables allows BGP to have non-congruent topologies for unicast and multicast networks. The BGP multicast address-family routes are used by multicast protocols such as Protocol Independent Multicast (PIM) to build data distribution trees.