This object controls whether this BGP speaker sends and receives routes for the IPv4 address family with this specific neighbor, participating only when set to enable. Administrators use it to selectively turn off the base IPv4 unicast exchange with a peer while perhaps keeping other address families like VPN-IPv4 active. For example, an engineer disables csBgpNbrIpv4AdminStatus for a peer that should only exchange VPN-IPv4 routes as part of an MPLS VPN service, without also carrying plain IPv4 internet routes.