On the Nokia 7750 SR, which of the following is NOT an address family that BGP supports?

On the Nokia 7750 SR, BGP supports numerous address families via MP-BGP extensions. These include ipv4 (AFI 1, SAFI 1), vpn-ipv4 (AFI 1, SAFI 128), and label-ipv4 (AFI 1, SAFI 4). "MP-EVPN" is not a formal BGP address family name. EVPN (Ethernet VPN) is a BGP network layer reachability information (NLRI) that uses the l2-vpn address family (AFI 25) with the EVPN SAFI (70). The "MP" in "MP-EVPN" refers to the Multi-Protocol capability of BGP that enables EVPN, but it is not part of the address family name itself.

A: IPv4 is the original BGP address family for exchanging IPv4 unicast routes and is fully supported. B: VPN-IPv4 is a standard address family used for MPLS L3VPN (VPRN) services and is fully supported. C: Label-IPv4 is a supported address family used for BGP Labeled Unicast (BGP-LU) to advertise labeled IPv4 prefixes.

1. Nokia 7750 SR OS BGP Protocol Guide, Release 22.10.R1, "BGP command reference". The config>router>bgp>group>family command context lists the supported address families, including ipv4, vpn-ipv4, and label-ipv4.

2. Nokia 7750 SR OS Services Guide, Release 22.10.R1, "EVPN for MPLS". This guide specifies that EVPN uses the l2-vpn address family.

3. RFC 8277, "Using BGP to Advertise Labeled IPv4 Routes". This document defines the address family identified as label-ipv4 in SR OS.