Patent ID: 7839795
Filing Date: 2010-11-23
Classification: H04L

Abstract:
1. A method of fault notification in a carrier Ethernet operable for generating and transmitting OAM packets having flag fields, comprising: responsive to a local failure or error at a first carrier Ethernet node and if a second carrier Ethernet node is capable of parsing time length value (TLV) identifiers, inserting a bit in a local defect indicator (LDI) field to indicate the presence of service-affecting information in the OAM packets, otherwise terminating insertion of continuity check messages at the first carrier Ethernet node, at the second carrier Ethernet node, detecting the presence of the inserted bit at the end of a data path or the absence of the continuity check messages, at the second carrier Ethernet node, performing a service protection action in response to the detection of the local failure or error, and at the second carrier Ethernet node, subsequent to the service protection action, parsing information in an associated message using a control plane, wherein the parsing comprises: