Patent ID: 8169896
Filing Date: 2012-05-01
Classification: H04L

Abstract:
1. A method of detecting a mismatch between a first Customer Backbone Port associated with a first Provider Backbone Bridging-Traffic Engineering (PBB-TE) Maintenance Association Endpoint (MEP) and a second Customer Backbone Port associated with a second PBB-TE MEP, wherein the Customer Backbone Ports are connected by a working Traffic Engineering Service Instance (TESI) and a protection TESI, the method comprising: determining whether a destination address of the second Customer Backbone Port and a Backbone VLAN ID (B-VID) for a TESI monitored by the MEPs are included in a backbone service instance table of the first Customer Backbone Port; setting a Traffic field in a first Continuity Check Message (CCM) sent from the PBB-TE MEP associated with the first Customer Backbone Port to the PBB-TE MEP associated with the second Customer Backbone Port on the working or protection TESI, said Traffic Field being set based on whether the destination address of the second Customer Backbone Port and the B-VID for the monitored TESI are included in the backbone service instance table of the first Customer Backbone Port and said Traffic field indicating a current TESI being utilized to transport the traffic from the first Customer Backbone Port; receiving by the PBB-TE MEP on the first Customer Backbone Port, a second CCM sent from the PBB-TE MEP on the second Customer Backbone Port, wherein the second Customer Backbone Port indicates in the second CCM, which TESI is being utilized to transport the traffic from the second Customer Backbone Port; determining whether a value of the Traffic field in the second CCM matches a value of the Traffic field in the first CCM; and detecting a mismatch when the value of the Traffic field in the second CCM does not match the value of the Traffic field in the first CCM.