Terms and Acronyms

dual-stack BGP (DS-BGP)—A router that processes IPv4 and IPv6 packets in a BGP-connected network.
Multiprotocol BGP (MP-BGP)—A router enabled for MP-BGP processes packets from a variety of protocols in a BGP-connected network.
Subsequent Address Family Identifier (SAFI)—A field in Multiprotocol BGP messages that identifies MPLS network layer reachability information (NLRI). Common values include 1 (unicast), 2 (multicast), and 4 (MPLS label).