ip-address—. IP address of the OSPF neighbor. If a secondary address is used on the interface, then the primary address must be used with this command.
Purpose: To configure OSPF neighbors over a nonbroadcast multiaccess (NBMA) network such as Frame Relay or X.25.
Initial Cisco IOS Software Release: 10.0 (12.0 for multipoint networks)
OSPF treats an NBMA network like any other broadcast network such as Ethernet. Because of this, OSPF thinks the network has broadcast capabilities even though it does not. This lack of a broadcast capability necessitates the use of the neighbor command to establish an ...