Nippon Telegraph and Telephone Corporation

Hiroki Mori

Ken Takahashi

Satoshi Nakatsukasa

Masatoshi Saito

A network monitoring apparatus sets monitoring targets that are physical interfaces included in leaf nodes and spine nodes, links connecting the leaf nodes and the spine nodes, transfer function units included in the spine nodes, and an overlay tunnel set between the originating-side leaf node on the terminating-side leaf node, aggregates monitoring results at the respective monitoring targets, and determines the failure type of a failure and the degree of influence of the failure on the basis of the type of the monitoring target in which the failure has occurred and the occurring event.

Network monitoring device, network monitoring method, and network monitoring program

A software update management apparatus includes a storage unit adapted to divide a network into one or more blocks and store block management information indicating whether each of network devices belonging to each of the resulting blocks is an active device or a standby device; an update instruction receiving unit adapted to receive software update instructions; a software update information generating unit adapted to generate software update information; a software updating unit adapted to perform software update processes after transferring traffic to standby devices in same blocks as respective active devices when it is determined that the network devices are active devices according to the software update information and thereby perform the software update processes for active devices or standby devices in different blocks in parallel.

Growing community of inventors

Musashino, Japan

Hiroki Mori