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:
Dec. 21, 2021
Filed:
Nov. 18, 2019
Applicant:
Fujitsu Limited, Kawasaki, JP;
Inventors:
Yuya Ikuta, Machida, JP;
Takeshi Umezuki, Yokohama, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 12/933 (2013.01); H04L 12/24 (2006.01); H04L 12/26 (2006.01);
U.S. Cl.
CPC ...
H04L 49/10 (2013.01); H04L 41/14 (2013.01); H04L 43/0817 (2013.01); H04L 63/101 (2013.01);
Abstract
A switch device includes: a memory; and a processor coupled to the memory and configured to: identify an adjacent switch device using a function that is operable even when a function of relaying communication is inoperable; confirm communication with the adjacent switch device which is identified, by using the function of relaying communication; and determine whether or not there is a silent failure in the switch device, based on a result of the communication confirmation.