MFF operation modes

The manual mode applies to networks where the hosts' IP addresses are manually configured. The hosts cannot obtain the gateway information through DHCP. A VLAN maintains only the MAC address of the default gateway.

After receiving an ARP request for a host's MAC address from the gateway, the MFF device directly replies the host's MAC address to the gateway according to the ARP snooping entries. After learning the gateway's MAC address, the MFF device updates the MAC address upon receiving an ARP packet with a different sender MAC address from the default gateway.