The number of HA group IDs is increased to 1024, extending the HA vMAC address range to support 1024 groups. Groups 0 to 255 use the same vMAC as in previous versions. Groups 256 to 1023 use vMAC addresses with the prefix e0:23:ff:fc. This avoids MAC address conflicts in cases where there are more than 256 FortiGate HA clusters on a network.
When the group ID is between 0 and 255, the vMAC starts with 00:09:0f:09:
config system ha set group-id 255 end
# diagnose hardware deviceinfo nic port1 Description :FortiASIC NP6 Adapter Driver Name :FortiASIC Unified NPU Driver Current_HWaddr 00:09:0f:09:ff:02 Permanent_HWaddr 08:5b:0e:72:3b:b2
When the group ID is between 256 and 1023, the vMAC starts with e0:23:ff:fc:
config system ha set group-id 256 end
# diagnose hardware deviceinfo nic wan1 Description :FortiASIC NP6LITE Adapter Current_HWaddr e0:23:ff:fc:00:02 Permanent_HWaddr 90:6c:ac:fb:b3:80