25.1.4 Layer 2 switching by MAC addressing
Layer 2 switching is performed based on the results of MAC address learning. If an entry corresponding to the destination MAC address has been kept, forwarding is performed only to the learned port.
The following table explains the specification by which Layer 2 switching operates.
|
Type of destination MAC address |
Operational overview |
|---|---|
|
Learned unicast |
Forwarding is performed to the learned port. |
|
Unlearned unicast |
Forwarding is performed to all ports belonging to the received VLAN. |
|
Broadcast |
Forwarding is performed to all ports belonging to the received VLAN. |
|
Multicast |
Forwarding is performed to all ports belonging to the received VLAN. However, for IGMP snooping or MLD snooping, forwarding is performed according to the learning results of the snooping functionality. |