Quick Reference Guide

OSPF Commands | 445
Example
Figure 23-136. Example Output from the show ip ospf neighbor interface Command
Report Fields If you do not specify an IP address, a table with the following columns displays for all neighbors or the
neighbor associated with the interface that you specify:
Interface—Valid unit, slot and port number separated by forward slashes.
Router Id—Is a 4-digit dotted-decimal number identifying neighbor router.
Options—An integer value that indicates the optional OSPF capabilities supported by the neighbor. The
neighbor's optional OSPF capabilities are also listed in its Hello packets. This enables received Hello
Packets to be rejected (i.e., neighbor relationships will not even start to form) if there is a mismatch in
certain crucial OSPF capabilities.
Priority—Displays the OSPF priority for the specified interface. The priority of an interface is a priority
integer from 0 to 255. A value of '0' indicates that the router is not eligible to become the designated
router on this network.
State—The types are:
• Down—initial state of the neighbor conversation - no recent information has been received from
the neighbor.
• Attempt—no recent information has been received from the neighbor but a more concerted effort
should be made to contact the neighbor.
• Init—an Hello packet has recently been seen from the neighbor, but bi-directional communication
has not yet been established.
• 2 way—communication between the two routers is bi-directional.
• Exchange start—the first step in creating an adjacency between the two neighboring routers, the
goal is to decide which router is the master and to decide upon the initial DD sequence number.
• Exchange—the router is describing its entire link state database by sending Database Description
packets to the neighbor.
• Full—the neighboring routers are fully adjacent and they will now appear in router-LSAs and
network-LSAs.
• Loading—Link State Request packets are sent to the neighbor asking for the more recent LSAs
that have been discovered (but not yet received) in the Exchange state.
Dead Time—The amount of time, in seconds, to wait before the router assumes the neighbor is
unreachable.
If you specify an IP address for the neighbor router, the following fields display:
Interface—Valid unit, slot, and port number separated by forward slashes
Neighbor IP Address—The IP address of the neighbor router
Interface Index—The interface ID of the neighbor router
Area ID—The area ID of the OSPF area associated with the interface
S50V-1#show ip ospf neighbor interface 1/0/24
Router ID Priority IP Address Interface State Dead Time
---------------- -------- --------------- ----------- -------- ------
192.168.2.1 1 192.168.3.1 1/0/24 Full/BACKUP-DR 31