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Subject: short packet revisited
From: Vikas Nanda <vikas,AT,pobox,DOT,upenn,DOT,edu>
Date: Wed, 12 Mar 2003 17:21:57 +0100

Dear Group:

I am finding the 'got short packet from ...' in the system log on my
firewall machine.  From the discussion on the mailing list last summer
(June 2002), I am not sure what is the appropriate action to take.

The basic setup is two RH 8.0 masquerading firewalls connecting two
LANs using cipe-1.4.5-11 (installed using rpm).  For the majority of
connections, traffic seems to move cleanly between the two LANs.  Only
when I run a molecular modelling program on one SGI that checks out a
license from another SGI on the other network do I see the message:

Mar 12 11:41:09 gateway kernal: cipcb75: got short packet from <peer ip>

Running ifconfig on the cipe interface shows an error rate on recieved
packets of around 10% ...

cipcb75   Link encap:IPIP Tunnel  HWaddr
          inet addr:  P-t-P:  Mask:
          RX packets:78376 errors:1188 dropped:0 overruns:0 frame:1188
          TX packets:21455 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:93347176 (89.0 Mb)  TX bytes:4347660 (4.1 Mb)

Other services, such as ssh and nfs appear to be functioning properly.
Any help would be greatly appreciated.


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