[c-nsp] Some packets lost on GRE

[Vincent De Keyzer]

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