Patent ID: 9509523
Filing Date: 2016-11-29
CPC Classification: H04L

Claim Text:
1. A method for protection switching in an Ethernet ring network, comprising: at a first node on the Ethernet ring network, detecting link failure; at the first node, determining whether a port through which a protection switching message has to be transmitted is on a forwarding path; and at the first node, generating a protection switching message based on the result of the determination; and at the first node, transmitting the protection switching message, wherein the generating of the protection switching message sets a Do Not Flush (DNF) bit of the protection switching message if the link failure occurs in a link that is included within the forwarding path and the port through which the protection switching message has to be transmitted is not on the forwarding path, wherein a value of the DNF bit determines whether a Filtering DataBase is flushed.