I use local interfaces in the file /etc/network/interfaces # The loopback network interface auto lo iface lo inet loopback # Dummy's auto dummy0 iface dummy0 inet manual iface dummy0 inet6 manual pre-up ip link add dummy0 type dummy auto dummy1 iface dummy1 inet manual iface dummy1 inet6 manual pre-up ip link add dummy1 type dummy On FRR I configure the inferface dummy0 like this : ! interface dummy0 description *** loopback0 *** ip address W.X.Y.Z/32 ipv6 nd suppress-ra ! The loopback (here the dummy) interfaces are used to mount my internal BGP sessions and access to the router from the WAN (public ip).