Posts

Showing posts from May, 2025

Address Family List under BGP Routing Protocol

  Address Family List under BGP Routing Protocol In BGP (Border Gateway Protocol), Address Family Identifiers (AFIs) and Subsequent Address Family Identifiers (SAFIs) are used to define the type of network layer reachability information being exchanged. These are typically configured under BGP routing protocol to support different types of routing information (like IPv4, IPv6, VPNv4, etc.). Here's a list of commonly used AFI/SAFI combinations under BGP: 🔹 Common Address Family List (AFI / SAFI) AFI (Address Family Identifier) SAFI (Subsequent Address Family Identifier) Meaning 1 (IPv4) 1 (Unicast) IPv4 unicast routing 1 2 (Multicast) IPv4 multicast routing 1 128 (MPLS-labeled VPN) VPNv4 (IPv4 MPLS VPN) 2 (IPv6) 1 (Unicast) IPv6 unicast routing 2 2 (Multicast) IPv6 multicast routing 2 128 (MPLS-labeled VPN) VPNv6 (IPv6 MPLS VPN) 25 (L2VPN) 70 (EVPN) Ethernet VPN (EVPN) 16388 128 (MPLS VPN) Route Target Constraint (RTC) 1 4 (...