| 摘要 |
PROBLEM TO BE SOLVED: To support efficient band use in a relay network that transfers a non-unicast frame received from an outside network by MAC-in-MAC encapsulation.SOLUTION: An L2SW 100 connects an ad network and an ah network. An FDB 114 associates and holds a VLAN-ID set at the ad network with the address of another L2SW transferring a MAC frame, in which the VLAN-ID is set, from the ah network to the ad network. If a MAC frame received from the ad network is a non-unicast frame, an encapsulation unit 124 generates a unicast frame in which the address of the L2SW associated with the VLAN-ID in a reception frame is set as a destination address added at the time of encapsulation. An ah transfer unit 126 transfers the unicast frame generated by the encapsulation unit 124 to the ah network. |
