OSPF Adjacency is down but point to point ping is successful

[ihsahn666]

Is it normal to get successful point to point pings even if the OSPF adjacency is down? If yes, may I ask why?

I might be forgetting basic concepts here but I would appreciate any comments and replies.

[balaji.bandi]

P2P interface not require any IGP protocol to discover each other, they connect each other so they can have reachability always.

basic concept -  point-to-point link-based system provides dedicated links between two devices.

[Richard Burts]

There are a number of parameters in the OSPF hello message that the routers check and which must match for adjacency to form. It could be that there is some mismatch between your routers. Posting the config of both routers would help us to understand the issue better. If you do not want to post complete configs then config of the connected interfaces and of OSPF from both routers would be helpful.

[ihsahn666]

Per checking, there seemed to be no mismatch on the routers' configurations. Here are the configurations on my routers by the way: https://imgur.com/xs7h1qd 

[Squozen_EU]

I'd check the MTU at both ends to be sure they match. If so, run a debug on the OSPF process and you should see why the adjacency is refusing to come up.

[Martin L]

As mentioned to form OSPF adjacency number of parameters must be met. Here is nice summary of those (must memorize for exam):

(Source: ICND2 exam cert prep book by W. Odom, CiscoPress)

 

Regards, ML
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