[c-nsp] Some packets lost on GRE

[David Sinn]

Have you verified you aren't loosing any packets in the buffers of either
routers ("show buff") or in the process queue on the interfaces ("sho int" -
input queue drops)?

A guess would be that one of the routers is dropping some measure of the
small packets that make up the two packets to send a 1477+byte ICMP inside
of the tunnel.

David


On 9/13/04 9:50 AM, "Vincent De Keyzer" <vincent at dekeyzer.net> wrote:

> Hello list,
>  
> I have here the weirdest problem:
> 
> * Router A and B are 7206VXR with NPE-400 and 12.2(13)
> * There is a GRE tunnel between router A and router B.
> * I have no view on the network underlying the GRE tunnel.
> * Pinging the physical interface of B from A works fine with packets
> up to 1500 bytes
> * Pinging the GRE interface of B from A works fine with packets up to
> 1476 bytes
> * pinging the GRE interface of B from A with packets from 1477 bytes
> on does not work fine anymore: around 0.5% packet loss.
> 
> Any ideas?
>  
> Vincent
>  
>  
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