***WORK IN PROGRESS*** Multiprotocol Extensions for BGP (MBGP), sometimes referred to as Multiprotocol BGP or Multicast BGP and defined in IETF RFC 4760, is an extension to Border Gateway Protocol (BGP) that allows different types of addresses (known as address families) to be distributed in parallel. Whereas standard BGP supports only IPv4 unicast addresses, Multiprotocol BGP supports IPv4 and IPv6 addresses and it supports unicast and multicast variants of each. Multiprotocol BGP allows information about the topology of IP multicast-capable routers to be exchanged separately from the topology of normal IPv4 unicast routers. Multiprotocol BGP is also widely deployed in case of MPLS L3 VPN Enable by configuring - Address family vpnv4 vpnv4 routes (VPN label) Extended Communities neighbour 1.1.1.1 send-communities extended VRF name Route Distinguisher 1.1.1.1:2 (keeps networks separate in MPBGP) local significant VRF (VRF PICTURE) Route Targets Export Target 10:10 ( out of the VRF into MPBGP ) Import Target 9:9 (out MPBGP into the VRF ) (how the routes should be shared with) router bgp 65020 LSP - Label Switching Path (each router applies its own label based upon its own routing table) |
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