[c-nsp] BGP hold time problem

[Matthew Simpson]

I'm having a problem with a BGP session with level3.  It has dropped 
twice in the last week now with a hold time expired message.  The port 
stays up and the BGP session comes back 5 minutes later.

Log:

%BGP-3-NOTIFICATION: received from neighbor 4.78.220.xx 4/0 (hold time 
expired) 0 bytes
%BGP-5-ADJCHANGE: neighbor 4.78.220.xx Down BGP Notification received
%BGP-3-NOTIFICATION: sent to neighbor 4.78.220.xx 4/0 (hold time 
expired) 0 bytes
%BGP-3-NOTIFICATION: sent to neighbor 4.78.220.xx 4/0 (hold time 
expired) 0 bytes
%BGP-5-ADJCHANGE: neighbor 4.78.220.xx Up

This is on a 6509 sup2 with 512MB of RAM.  I don't have any problems 
with my other BGP peer.

I did have the hold timer configured at 30 seconds instead of 180 second 
default, so I just changed it back to 180 seconds, but if that doesn't 
work I'm at a loss for ideas.

Level3 claims nothing is wrong, and that they see the same thing on 
their side (hold time expired) and that it's my fault.

Any ideas?