The peer command sets an IP address and a DR priority for an adjacent device on an NBMA network.
The undo peer command cancels the configured IP address and DR priority.
By default, IP address and a DR priority for an adjacent device on an NBMA network is not set.
Usage Scenario
On an NBMA network (such as an X.25 network), the entire network can be fully meshed if adjacent router mapping is configured. With the mapping, there is a virtual link between any two routers. In this case, the OSPF network can be considered as a broadcast network where a DR or BDR can be selected. However, adjacent routers cannot be detected dynamically by broadcasting Hello packets. To address this problem, run the peer command to specify an IP address and a DR priority for each adjacent router.