Patent ID: 8774175

Claim:
A relay system comprising: a first relay apparatus connected to a node through a first line; and a second relay apparatus connected to the node through a second line, wherein the first line and the second line belong to the same link aggregation group, the first relay apparatus includes: a first storage unit for storing first relation information regarding a relationship between a destination address and an output port of the first relay apparatus, and a first control unit to notify, after receiving a frame and before relaying the received frame, the second relay apparatus of a source address included in the received frame in the absence of first relation information related to the source address in the first storage unit upon receiving the received frame via a port connected to the first line, and the second relay apparatus includes: a second storage unit for storing second relation information regarding a relationship between a destination address and an output port of the second relay apparatus, and a second control unit to store, in the second storage unit, second relation information regarding a relationship between the source address notified by the first relay apparatus and an output port connected to the second line.