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:
Jun. 15, 2010
Filed:
Sep. 19, 2008
Masashi Suzuki, Yokohama, JP;
Manabu Fujita, Hadano, JP;
Hiroyuki Isogai, Hadano, JP;
Shinji Nozaki, Sagamihara, JP;
Masashi Suzuki, Yokohama, JP;
Manabu Fujita, Hadano, JP;
Hiroyuki Isogai, Hadano, JP;
Shinji Nozaki, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Hybrid Network Co., Ltd., Kanagawa, JP;
Abstract
The network relay device of the invention carries out data transmission to and from an opposite device to relay data in a network. The network relay device includes: multiple ports connecting with corresponding multiple ports of the opposite device via multiple links; and a link aggregation control module that aggregates the multiple links to establish a link aggregation, which is regarded as one logic link, and carries out transmission of a control frame signal including a synchronization bit, as well as data transmission, at each port via the link aggregation. In response to detection of occurrence of a trouble in at least one of the aggregated multiple links, the link aggregation control module causes a port that connects with a normal link without the trouble among the multiple ports to stop the data transmission and send the control frame signal including the synchronization bit set equal to a first value. Here the first value functions to stop the data transmission at a corresponding port of the opposite device connecting with the normal link.