I am a newbie: I have four boxes A1,A2,A3,A4 that need to communicate with 4 other boxes B1,B2,B3,B4 with these "permutations": A1 needs to communicate with B1,B2,B3,B4 A2 needs to communicate with B1,B2,B3,B4 A3 needs to communicate with B1,B2,B3,B4 A4 needs to communicate with B1,B2,B3,B4 For technical reasons A1,A2,A3,A4 have the same IP addresses (and this cannot be changed). B1,B2,B3,B4 all have different IP addresses. Is it possible to define VLANs: V1: A1,B1,B2,B3,B4 V2: A2,B1,B2,B3,B4 V3: A3,B1,B2,B3,B4 V4: A4,B1,B2,B3,B4 so that the traffic is properly segregated and A1,A2,A3,A4 having the same IP address is not a problem ? Note: One acceptable limitation would be that the switch "translates" the IP addresses of A1, A2, A3, A4 to fixed+reproducable+known new unique IP addresses during send/receive operations respectively (for B1,B2,B3,B4 I can specify the source and destination IP addresses for both directions send/receive as they decode the ethernet frames on a low protocol level, they don't run the "default" TCP/IP stack). Additionally, I need to be able to define an alternative configuration: V1: A1,B1 V2: A2,B2 V3: A3,B3 V4: A4,B4 If all of the above is possible, can someone point me to a (managed) switch that for once allows such VLAN configuration based on ports, in addition allows to fix the port speed for each port (another restriction that I have), allows to save and restore different configurations (see the 2 alternatives) and additionally has a HTTP based web interface for configuration ? Thanks for any help, Lars Erdmann