This section describes OSPF configuration fundamentals.
Enabling OSPF in Cisco IOS Software
OSPF is enabled in Cisco IOS software by issuing the router ospf [process id] global configuration command. The [process id] keyword is locally significant and does not need to be the same on all routers in the network in order to establish an adjacency. The use of the locally significant process ID allows you to configure multiple instances of OSPF on the same router.
The OSPF process ID is an integer between 1 and 65535. Each OSPF process maintains its own separate Link State Database; however, all . . .
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