I know few network engineers who dont love IP addresses (I know its hard to believe, but life works in its own mysterious ways) and they prefer to view proper domain names in your show commands rather than the raw IP
addresses. Well atleast thats possible for your OSPF routers.
You can configure OSPF to resolve IP addresses into router
names with the following global configuration command:
Router3#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router3(config)#ip ospf name-lookup
Router3(config)#end
Router3#
When you configure OSPF name lookup, the router will use its
locally configured host table, if it has one, or DNS to resolve the names. If
both are present, the router will check the local host table first. You can
enable DNS on a router with the
ip domain-lookup and
ip name-server commands
Enabling name resolution can be useful when displaying
information such as OSPF neighbor tables. For example, if we look at the
neighbor table without name lookup enabled, we see IP addresses:
Router3#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
172.20.220.1 1 FULL/DR 00:00:34 172.20.10.2 Ethernet0
172.25.25.1 1 FULL/ - 00:00:31 172.20.1.1 Serial0.1
Router3#
But, when name lookup is enabled, the router replaces the
router IDs with names:
Router3#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
Router6 1 FULL/DR 00:00:37 172.20.10.2 Ethernet0
Router1 1 FULL/ - 00:00:36 172.20.1.1 Serial0.1
Router3#