Administering Neighbors 13-21
Administering
Neighbors
Neighbor routers are physically attached to the same network segment
and exchange OSPF routing tables.
Displaying Neighbors Use this command to display information about the currently defined
neighbors in an OSPF area.
To display information about OSPF neighbors, from the top level of the
Administration Console, enter:
ip ospf neighbors display
This example shows OSPF neighbors:
Top-Level Menu
system
ethernet
fddi
atm
bridge
➧ip
ipx
appletalk
snmp
analyzer
script
logout
interface
route
arp
multicast
udphelper
routing
icmpRouterDiscovery
➧ospf
rip
ping
statistics
areas
defaultRouteMetric
interface
linkStateData
➧neighbors
routerID
partition
stubDefaultMetric
virtualLinks
statistics
➧display
add
remove
OSPF neighbor information
Indx Neighbor Addr Router ID State Pri RxQ SumQ ReqQ Flags
2 158.101.142.254 158.101.142.254 Full 1 0 0 0 D+DR
Table 13-9 Field Attributes for Neighbors Display
Field Description
Indx Interface index that a neighbor belongs to.
Neighbor Addr Interface address of neighbor.
Router ID Router ID of neighbor’s OSPF.
State Neighbor’s adjacency:
■ Down = No recent data received from neighbor, connection is
down.
■ Attempt = Only used on nonbroadcast networks. No recent
data received from neighbor (will attempt to contact).
■ Init = Have recently seen hello packet from neighbor,
however two-way communication has not been established.
■ Two-way = Bidirectional communication has been established.
■ ExStart = Taking initial step to create adjacency between
neighboring routers.
■ Exchange = Database descriptions are being exchanged.
■ Loading = LSA databases are being exchanged.
■ Full = Neighboring routers are fully adjacent.
Pri Router priority of neighbor’s OSPF.
RxQ Number of LSAs in local retransmit queue to the neighbor.
(continued)
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