I have VPN server model 3030 (VPN software 4.7.2 rev F) and it stops forwarding packets. I looked through the log file and cannot find any reason why it stops. The only other indication I see is large amount of CRC and input errors from the VPN server to Catalyst 4500 switch port. Rebooting the VPN server resolves the problem. Does anyone know of any problems with this rev of code?