Applicability and Backward Compatibility The mechanisms defined in this document are OPTIONAL and are used in PWE3 applications where standby state signaling of PW/PW group is required PE implementation compliant to this document It MUST negotiate the use of PW status TLV between its T-LDP peers as per RFC 4447 If PW Status TLV is found to be not supported by either of its endpoint after status negotiation procedures, then the mechanisms specified in this document cannot be used PE implementation compliant to RFC 4447 and which does not support the generation or processing of the active/standby status bit will not set this bit in the status bits transmitted to a peer PE, and will not examine it in the received status bits from a peer PE The mechanisms specified in this document cannot be used |