packet fragmentation

From: roboftheblues (robwood894_at_hotmail.com)
Date: 09/27/05 

Date: 27 Sep 2005 08:21:21 -0700

we have a unix box that receives ICMP fragmentation requests because
the MTU size is too large, but it continues to retransmit the packet
without changing the MTU size. I don't know Unix, how can I check if
there is a setting on this box that is preventing the packet from
fragmenting

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