Patent ID: 9270485
Filing Date: 2016-02-23
CPC Classification: H04L

Claim Text:
1. An Ethernet Ring Protection (ERP) method, comprising: when a fault on a link on an Ethernet ring network is detected by a ring node, determining, by the ring node, whether the faulty link is a link where a normally blocked port locates; and sending, by the ring node, a first control message which carries a fault occurrence indication and a non-clearing indication to other ring nodes on the Ethernet ring network, if the faulty link is the link where the normally blocked port locates, wherein the non-clearing indication indicates that a forwarding table is not desired to be cleared by the other ring nodes; wherein the first control message is an Alarm Indication Signal (AIS) packet in the Ethernet Operation Administration and Maintenance (OAM) mechanism, and the AIS packet includes a Flags field that carries the fault occurrence indication and the non-clearing indication.