Alaxala Networks Corporation

Hiroyuki Yoshino

Shinji Nozaki

Kensuke Ino

Motohide Noumi

A network device is configured to: detect a virtual network that is unable to relay communication as a failed virtual network; identify, as a failed virtual network identifier, a virtual network identifier assigned to a combination of the failed virtual network and a physical port through which communication of the failed virtual network pass, based on mapping information; identify a first virtual tunnel end point that relays communication of the failed virtual network; identify a second virtual tunnel end point of another network device that communicates with the first virtual tunnel end point based on the tunnel information; and send, to the second virtual tunnel end point, a clear request including the failed virtual network identifier and an IP address of the first virtual tunnel end point, and the clear request being used for clearing a MAC address used in Layer 2 protocol.

Network device that relays communication

In a ring network including an old master node, a new master nodeis used as a replacement for the old master node. During replacement operation, when detecting that two ring ports of the new master nodeare set in link-up state, the new master nodegives a transit nodean instruction to forward a health check frame Hsent from a ring portof the old master nodeby a forwarding route going through the new master node. The new master nodecan monitor the status of the ring network by receiving the health check frame H. This configuration enables continuous monitoring for a failure occurring in the ring network during replacement of the master node.

Growing community of inventors

Kawasaki, Japan

Hiroyuki Yoshino