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:
Mar. 18, 2014
Filed:
Dec. 21, 2007
Shigeru Suzuyama, Fukuoka, JP;
Hiroshi Kinoshita, Fukuoka, JP;
Shingo Suzumori, Fukuoka, JP;
Takahiro Suetsugu, Fukuoka, JP;
Daisuke Nagai, Fukuoka, JP;
Kunihiko Hamamoto, Fukuoka, JP;
Shigeru Suzuyama, Fukuoka, JP;
Hiroshi Kinoshita, Fukuoka, JP;
Shingo Suzumori, Fukuoka, JP;
Takahiro Suetsugu, Fukuoka, JP;
Daisuke Nagai, Fukuoka, JP;
Kunihiko Hamamoto, Fukuoka, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The disclosed apparatus includes a MAC learning table storing a MAC address and port identification information that uniquely identifies a port for transferring a frame to which the MAC address is assigned. The apparatus includes updating the MAC learning table, reading a MAC address of a link trace frame, transferring the link trace frame via a port determined based on the MAC learning table, storing a correspondence relationship of a predetermined MAC address and port identification information, saving a correspondence relationship set as an object to be deleted at a time of updating the MAC learning table, transferring the link trace frame, if there is no correspondence relationship relevant to the MAC address of the link trace frame in the MAC learning table, and sending a response frame to a switching hub which is an originator of the link trace frame with transfer of the link trace frame.