| 摘要 |
A transmission source MAC address and a piece of VLAN tag information are extracted from a reception packet, and the piece of VLAN tag information is stored in an MAC address learning table while being associated with the piece of VLAN tag information. A transmission destination MAC address is extracted from a transmission packet. A piece of VLAN tag information associated with the MAC address is acquired from the MAC address learning table. The piece of VLAN tag information is added to the packet and transmitted with the packet.
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