Chapter 09 Open Shortest Path First (OSPF)

• link: An interface with OSPF
• Router ID (RID): The highest loopback address of the router
• Neighbor: Routers connected to common network.
• OSPF neighbor: two neighbors with same Area ID, stub area flag, password, hello & dead intervals
• Adjacency: Two routers that send each other updates
• Designated Router (DR): master router on a broadcast network segment. Sends routing updates.

R#config t
R(config)#router ospf [process ID]
#(config-router)#network 10.0.0.0 0.255.255.255 area [area-id]
#(config-router)#network [ip] [wildcard mask] area [area-id]

• selects all interfaces matching the network + wildcard.
• Process ID ranges from 1 through 65,535
• Area id 1 through 4.2 billion (can be expressed like an ip)
• Not a subnet-id, but a wildcard match!