Thank you @lagapidis for your swift response as usal, they are connected over the carrier circuit. In carrier (transmission), their MTU is 12323.
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Hi
I am confused.
I have configured Ospf network type p2p on R1 and the adjacent router R2 default network type Broadcast.
so I have a network type mismatch
I thought this would cause the routers to fail establishing a full adjacency, however, they form a full adjacency regardless of the network type mismatch.
is this a fix in IOS XE or has this always been the case?
I think I was taught that the network type must match in order to establish a full adjacency?
Hello Orla
I understand your confusion. You should indeed configure the same network types on adjacent OSPF routers, but there are cases where an adjacency will still form if the network type is different. You can find out more details about this at the NetworkLessons note titled: OSPF Network Type Mismatch.
Even if an adjacency may form if the network type is different you should always ensure that you have the same network type on both ends for any production network!
I hope this has been helpful!
Laz