Re: ASR9k - ospf stuck in exchange

What's the IP MTU on the interfaces? That's what needs to match...

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Marko Milivojevic - CCIE #18427 (SP R&S)
Senior CCIE Instructor - IPexpert
On Mon, Apr 23, 2012 at 10:43, AKHILESH THAKUR <akhi_thakur_at_hotmail.com> wrote:
> 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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