ASR9k - ospf stuck in exchange

Dear Experts,
I have migrated my network from 7600 to ASR9k. Before migration if the link
between two router supports max mtu of 1536
and interface is configured with mtu9216, the ospf will come up.

Now at one end is ASR9k with same configuration it doesnot work. I know the
ASR9k put additional mtu of 14 bytes on ethernet ports and has been adjusted.

so at ASR9k end mtu is 9216 and 7600 end mtu is 9202. The ospf just stuck in
exchange.
I have opened the tac case and since the link is max support 1536, accordingly
needs to change the mtu at asr9k. I tired with mtu-ignore but failed.

Wanted to know whats the difference between 7600 and asr9k ospf DBD packet
handling ?

Any of you guys faced similar issue and the way to deal with it.

Regards
Akhilesh

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Received on Mon Apr 23 2012 - 17:43:37 ART