| 摘要 |
A relay device ( 1 ) includes a plurality of network processing units ( 200 - 1~200 -N) having the same function and structure. A session management unit ( 202 - 1 ) in a certain network processing unit (e.g. 200 - 1 ), when receiving a packet from an external network through an IF unit (e.g. 204 - 1 - 1 ) in the same processing unit, searches a session table ( 230 - 1 ) for IF specifying information indicative of an IF unit as an output destination determined for a session to which the above packet belongs. When the above IF specifying information indicates an IF unit (e.g. 204 -N-M) in other network processing unit (e.g. 200 -N), a packet processing unit ( 201 - 1 ) transfers the above IF specifying information and the above packet to the network processing unit ( 200 -N) through a switch unit ( 300 ). A packet processing unit ( 201 -N) in the network processing unit ( 200 -N) outputs the above packet to the IF unit ( 204 -N-M) represented by the IF specifying information.
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