Patent ID: 8014296
Filing Date: 2011-09-06
Classification: H04J

Abstract:
1. A method for controlling capacity associated with a virtual concatenation group (VCG) comprising the steps of: adding a plurality of member virtual tributaries (VTs) to the VCG by an intermediate node whose hardware does not support Link Capacity Adjustment Scheme (LCAS) protocol running at hardware level on the hardware; retrieving, by software at the intermediate node, Synchronous Optical Network (SONET) and virtual concatenation (VCAT) information from the hardware in the intermediate node; determining in software at the intermediate node if a SONET frame associated with a member VT added to the VCG indicates a SONET defect; if the SONET frame associated with the member VT added to the VCG indicates a SONET defect, removing the member VT from the VCG until the SONET defect clears; determining in software at the intermediate node if a SONET frame associated with the VCG has an H4 byte that is corrupt; and if the SONET frame associated with the VCG has an H4 byte that is corrupt, removing all of the plurality of added member VTs from the VCG and placing the VCG in a down state until H4 byte corruption clears.