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show ip ospf neighbor [interface <slot/port>] [<ip-address>]
Default Setting
None
Command Mode
Privileged Exec
User Exec
Display Messages
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:
Router ID: The 4-digit dotted-decimal number of the neighbor router.
Priority: 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.
IP Address: The IP address of the neighbor.
Interface: The interface of the local router in slot/port format.
State: The state of the neighboring routers. Possible values 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 bidirectional
communication has not yet been established.
• 2 way - communication between the two routers is bidirectional.
• 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.
• 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.
• Full - the neighboring routers are fully adjacent and they will now appear in router-LSAs and
network-LSAs.
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 slot and port number separated by a forward slash.
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.