Port roles
Two types of ports, user port and network port, exist in an MFF-enabled VLAN.
User port
An MFF user port is directly connected to a host and processes the following packets differently:
Allows multicast packets to pass.
Delivers ARP packets to the CPU.
Processes unicast packets as follows:
If gateways' MAC addresses have been learned, the user port allows only the unicast packets with the gateways' MAC addresses as the destination MAC addresses to pass.
If no gateways' MAC addresses have been learned, the user port discards all received unicast packets.
Network port
An MFF network port is connected to any of the following networking devices:
An access switch.
A distribution switch.
A gateway.
A server.
A network port processes the following packets differently:
Allows multicast packets to pass.
Delivers ARP packets to the CPU.
Denies broadcast packets other than DHCP and ARP packets.