PROTECTION SWITCHING METHOD FOR ETHERNET AUTOMATIC PROTECTION SWITCHING (EAPS) RING NETWORK AND MASTER NODE IN EAPS RING NETWORK

The present invention discloses a protection switching method for an EAPS ring network and a master node in an EAPS ring network. The master node includes: a secondary port module, a state judgment module, a count module and a restoration module; the method includes: after receiving a ring network health detection message at a secondary port of a master node, if judging that the ring network in which the master node is located is in a Failed state currently, the master node starting to count a number of the ring network health detection messages received by the secondary port in a preset period, and if the counted number is greater than or equal to a preset threshold, then performing a restoration switching operation. After using the present invention, unnecessary switching caused by the link quality reduction can be reduced in the EAPS ring network, which alleviates the loads of the ring network elements and increases the robustness of the EAPS ring network.