HA MAC address

[Graham Jones]

We want to set up a High Availability pair of GB-1000.   It would be nice to use a single managed switch configured with two VLANs to implement the External and DMZ network connections for each GB-1000.  The two switches are then connected together (one cable for each VLAN) so that the switches themselves become a fault tolerant pair - both VLANs survive even if one switch fails.   We tested this with one GB-1000 prior to installation at the customer.   When the GB-1000 is in INIT mode or SLAVE mode, each of its interfaces (visible via their respective configuration IP addresses) has a different MAC address - so a switch with two VLANs works correctly.   When the GB-1000 is in MASTER mode ALL its interfaces (now implementing the desired virtual IP addresses) show the same MAC address.  The switch with two VLAN then fails to operate properly because it cannot handle the same MAC address across two separate VLANs.   So we have to connect one switch on the DMZ and the other on the External network - which is OK until a switch fails.  This would completely break one network and neither GB-1000 will be able to see any of its beacons on that network - so both GB-1000 will go to INIT mode - and nothing works until somebody replaces the faulty switch.   OK so we can work around this with more cheap switches or hubs so that there is no single point of failure on any network.   But it would be REALLY GOOD if the GB-1000 when in master mode had 4 different MAC addresses, one for each network interface.  Can this be done?     -- Graham