[c-nsp] me3600 ospf %100 cpu blowup

[adamv0025 at netconsultings.com]

> Mike
> Sent: Saturday, January 13, 2018 3:36 AM
> 
> 
> My initial analysis was flawed and reload did not in fact address the
problem.
> I was able to observe the neighbors all having issues again and this time
I saw
> that a neighbor relationship was stuck in 'loading'
> state. After a lot of looking around, I determined that the interface and
ip
> mtu both were 9216. I suspect that this mtu was too big and that my igp
had
> grown to a point where fragmentation was needed but due to an incorrect
> mtu here, the updates were not working due to full size packets. I added
'ip
> mtu 9000' and the problem has not come back since
> (>10 hours now).
> 
> 
Hmm could it be that you hit the mtu limit of your links (which is not 9216
but just 9000)?

adam

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