we have many RHEL 3 Update 9 servers who's bnx2 driver (v52d) STOPS
sending packets and they pile up in the SEND QUEUE when viewing
through 'netstat -a'.

This problem happens randomly and we cannot consistently duplicate it.

What could I do on the local box between the 2 'on board' NICS to
force loads of data from one NIC to the other to try to duplicate this
problem?