The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2015
Filed:
Jan. 04, 2011
Minaxay Philavong, Tokyo, JP;
Masanori Takashima, Tokyo, JP;
Youichi Hidaka, Tokyo, JP;
Tetsu Izawa, Tokyo, JP;
Shihomi Sato, Tokyo, JP;
Minaxay Philavong, Tokyo, JP;
Masanori Takashima, Tokyo, JP;
Youichi Hidaka, Tokyo, JP;
Tetsu Izawa, Tokyo, JP;
Shihomi Sato, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a network system in which a switch forwarding packets and a control server determining route information are separated, it is desired to achieve a redundancy of the control channel by an out-of-band control channel and an in-band control channel, when the switch receives a control message regarding the flow entry registration and the like based on the route information from the control server. Specifically, the separated switch and control server are connected by a control channel for sending and receiving the control message. The switch is not only connected to a control server via an out-of-band control channel by a route dedicated to the control message, but also connected to another control server via an in-band control channel by a route which is common with a normal data communication for determining the route information, to achieve a redundancy of the control channel.