Patent ID: 11956146
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The controller according to claim 2,
wherein the processing circuitry
performs a first update for updating the network-information database so that a frame of each existing flow to be changed is forwarded on two routes which are a pre-change path and a post-change path,
transmits an update notifying frame including information on the first update to each switch existing on the pre-change path and each switch existing on the post-change path,
receives from each switch, a confirmation notifying frame for confirming that the frame of each existing flow to be changed has been forwarded on the two routes,
performs a second update for updating the network-information database so that the frame of each existing flow to be changed is forwarded on one route which is the post-change path, and
transmits an update notifying frame including information on the second update to each switch existing on the pre-change path and each switch existing on the post-change path.