AI, ML, Development + Cisco Learning Blog Learning about Machine Learning, Artificial Intelligence, related devlopment topics and formerly Routing and Switching, Datacenter, Security and other topics, CCIE #23664, Frank Wagner

19. Juli 2006

OSPF area defintion with interfaces

Filed under: OSPF — ocsic @ 11:31

I have see this on some LAB examples. It looks like this:

interface serial0

ip add 172.16.10.1 255.255.255.0

router ospf 1

And then there are two possible solutions for the wildcard mask within the network definition.

1. network 172.16.10.0 0.0.0.255 area 0

and i have also seen this:

2. network 172.16.10.1 0.0.0.0 area 0
So both area definitions are possbile. Not that with the secound example, it’s not necessary to calculate a wildcard mask for OSPF.But for some reason i don’t feel like using it. But on the other side, this make sure you don’t misconfigure the OSPF network wildcard mask.

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