I am trying to partition off 4 sections of the Cat 3750, to act as virtual switches separate from each other. I want traffic to go from VLAN 2, through an Intrushield device, to VLAN 3 which has the gateway port. Whenever I connect the Intrushield, I get Native VLAN mismatch messages on the switch console and the communication does not work. I understand that the switch is seeing the same traffic on 2 different VLANs (exiting out a port on VLAN 2, traversing the Intrushield, and re-entering the switch on VLAN 3)and is complaining. Does anyone know how to do this? Do I need to buy separate switches, or can the cat 3750 be partitioned this way? If it can, how?