Forum Discussion
Henrik_S
Sep 05, 2016Nimbostratus
Was it by any chance a virtual LTM? If so, you must configure the port group or equivalent to accept forged MAC transmits, mac address change and promiscious mode.
MAC masquerade means in basic that the same virtual MAC address will be shared between two systems in HA. This however requires upstream units as switches, vswitches and port groups to both allow allow a MAC address to change and that a given interface will send "forged" transmits with the mac masquerade address for traffic passing through that traffic group.