The dual-active relay command enables the relay function on a specified interface of a proxy device.
By default, the relay function is disabled on an interface.
In DAD in relay mode, you need to use the dual-active relay command to configure the relay function on a specified Eth-Trunk interface of a proxy device. Member interfaces of the Eth-Trunk interface forward DAD packets to each other so that member switches can exchange DAD packets.
It is replaced by the mad relay command.