Redundant ethernet transmission line system

Abstract

A system is disclosed to switch over redundant Ethernet transmission lines using link status control, as decreasing software intervention required for the transmission and reception of control frames, etc. The system includes Ethernet transmission lines having redundant configuration, first and second transmission equipment being connected through the Ethernet transmission lines. An Ethernet switch provided in the first transmission equipment learns a route configuration from the frames transmitted from the first and the second transmission equipment. Switchover of the active transmission line is performed using the learned information on the route configuration.

Dependencies are inferred from the claim text.