I have a T1 frame-relay connection to the internet on one router. On a second router, I have an HDLC T1 connection to the the internet. I form a ipsec protected tunnel between the two sites. When the tunnel comes up, and OSPF performs its adjacency, I start to get a tonne of 'adjacency fixup' messages, and my router cpu goes high. Any ideas as to why I get the messages? I have to 'shut' the tunnel to stop the messages.
I did a 'clear ip ospf process' and the problem appears to have disappeared. I'm not sure if it will re-appear. I had been fooling with the bandwidth parameters on the tunnel (the bandwidth on the serial interface had been upgraded). Now that I have those configured, will it remain stable?
To be able to answer that question we would need to have a little more information. In particular if you could post the OSPF configuration and the output of show ip ospf interface would be helpful.
Without knowing many details of what you are running I would make my first guess that the issue you were running into may have been a recursive routing issue with the tunnel. Recursive routing is a likely issue especially if the same dynamic routing protocol advertises the subnet of the tunnel address and announces the subnet of the tunnel destination.
We are pleased to announce availability of Beta software for 16.6.3.
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