Pages 471/472 Sh IP Ospf Int comparisons...

[Rogueone]

does it matter that both routers show 172.126.1.1 as the Router ID??

I'd'a thunk that might'n cause some ish-shues :)

[lammle]

You're right. It does show the ID as 172.126...
I can't figure out how that happened as all my addreses were 172.16 in this lab, and I was using real equipment, etc, and was not making most of this up at the time ;)

Thanks for letting me know.
Cheers!
Todd

[aguilera]

You bet it would cause some issues!

The whole idea of having RIDs is to uniquely identify each ospf neighbor.

The example in the book should have RouterA with a router ID of 172.16.1.2 and RouterB with a router ID of 172.16.1.1

Would RouterA and RouterB have problems working out their relationship with each other if they both had the same router ID???

Sho-nuff!

Good catch!


If two or more routers within a network segment have different timers they will not form an adjacency. Duplicate RouterIDs will cause problems too!

ciao,
aguilera