Telefonaktiebolaget Lm Ericsson (publ)

Marconi Intellectual Property (ringfence), Inc.

Kevin Nolish

Panagiotis Saltsidis

Zhemin Ding

Paul S Griffith

A method for detecting a mismatch between a first port and a second port includes determining whether a destination address associated with the second port and a virtual local access network identifier (VID) for a service instance monitored by a first maintenance end point are included in a table of the first port. The method further includes setting a traffic field in a first continuity check message. The method additionally includes receiving, at the first maintenance end point, a second continuity check message that includes a traffic field. The method also includes detecting a mismatch when the value of the traffic field in the second continuity check message does not match the value of the traffic field in the first continuity check message.

Connectivity fault management traffic indication extension

A method in a Maintenance Association Endpoint, MEP, for controlling traffic between a first network element and a second network element connected by a working Traffic Engineering Service Instance, TESI, and a protection TESI. The first network element sets a Traffic field in a Connectivity Check Message, CCM, sent to the second network element. The Traffic field may be set by utilizing a reserved bit within a Flags field of the CCM. The Traffic field indicates which TESI is being utilized to transport the traffic. The second network element takes action to control the traffic based upon a value of the Traffic field in the received CCM. When the Traffic field value in the received CCM does not match the Traffic field value in CCMs sent from the second network element for a predefined period of time, the second network element moves the traffic from its current TESI to the other TESI.

A communications network. The network includes a plurality of network elements connected by links along which data flows between the network elements, and which together protect against link failures between the network elements and failures of network elements which would otherwise disrupt the data flow between the network elements. The plurality of network elements include a first network element; a second network element; a third network element; and a fourth network element. The links include an active communications link connected between the first network element and the second network element along which the data travels, and a redundant communications link to the active communications link connected between the third network element and the fourth network element along which the data travels. The links include a first protective link connected between the second network element and the fourth network element along which the data received by the second network element is retransmitted to the fourth network element. A method for transferring data on a telecommunications network.

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Pittsburgh, PA, United States of America

Kevin Nolish