642-691 BGP+MPLS %BGP-4-VPNV4NH_MASK and OSPF advertising loopback as /32 by default Recently when doing some MPLS VPN lab work I came across the error %BGP-4-VPNV4NH_MASK: Nexthop 4.4.4.4 may not be reachable from neigbor 2.2.2.2 - not /32 mask It occurs because by default OSPF advertises loopback interfaces with