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. 25, 2012
Filed:
Jan. 29, 2010
Tetsuya Nishi, Kawasaki, JP;
Tetsuya Nishi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method includes: identifying a test source address (SA) in a second network and a test destination address (DA) in a third network, wherein a packet is presumed to be transmitted from the second network to the third network through plural communication routes in a first network; causing an output edge router connected to the third network to change settings of an ARP table in the output edge router so as not to transfer the packet addressed to the test DA to the third network; obtaining the first number of input packets from each counting router on each route; transmitting a test packet including the test SA and DA, plural times; obtaining the second number of input packets from each counting router; calculating a difference between the first and second numbers for each route; and identifying a route through which the test packets passed, based on the differences.