Patent ID: 8750136
Filing Date: 2014-06-10
Classification: H04L

Abstract:
1. A computer-readable, non-transitory medium storing a program that causes a computer to execute a monitoring method comprising: detecting a cut link, the cut link being among a plurality of links forming a link aggregation; counting lost packets related to remaining links in the plurality of links excluding the cut link to obtain a first lost packet count for each first address included in packets passed through the remaining links; sorting the first lost packet counts into first segments corresponding to the remaining links; determining degradation in quality for each first segment on the basis of the first lost packet counts sorted into the first segments; determining whether the cut link is in failure on the basis of the determined degradation in quality for each first segment; outputting a determination result of whether the cut link is in failure; counting, before detecting the cut link, lost packets related to the plurality of links to obtain a second lost packet count for each second address included in packets passed through the plurality of links; sorting the second lost packet counts into second segments corresponding to the plurality of links; and determining degradation in quality for each second segment on the basis of the second lost packet counts sorted into the second segments, wherein the computer determines whether the cut link is in failure on the basis of the determined degradation in quality for each first segment and the determined degradation in quality for each second segment.