ip virtual-reassembly

darrell-j · ‎05-19-2008

I have recently began having trouble uploading files larger than 5mb. I looked in my router logs and saw the following error message -

" %IP_VFR-4-FRAG_TABLE_OVERFLOW: Vlan1: the fragment table has reached its maximum threshold 16"

Could this be causing my issue and what negative effect will changing the maximum threshold have?

Edison Ortiz · ‎05-19-2008

You could be suffering from a MTU issue. Please describe the devices involved in the path (from the FTP Client to the FTP server) and verify there isn't any fragmentation occurring due MTU.

Do you have any GRE tunnel in the transit path?

HTH,

__

Edison.

darrell-j · ‎05-20-2008

The windows workstation connects to a cisco 2950. The cisco 2950 connects to a cisco 1711 which connects to the server via a GRE tunnel using a Cisco 3000 VPN concentrator.

Edison Ortiz · ‎05-20-2008

The GRE tunnel is the cause of your problem.

Please follow this link on how to address fragmentation when using a GRE tunnel

http://www.cisco.com/warp/public/105/pmtud_ipfrag.html

HTH,

__

Edison.

darrell-j · ‎05-21-2008

Thanks for your help Edison.