CentOS - Feb 2006 - CentOS 4.2 - x86_64 - Crash

Hi

Got a box that is acting as a LVS box to a cluster of webservers. Last 
night the LVS box locked up and the following error was on the console 
apparently (this is a remote hosted box) - a hard reboot was the only 
solution

dst cache overflow

any ideas on how to solve this? the LVS box is also acting as the FW and 
is doing outbound NAT for the internal network

thanks