Patent ID: 8169917

Claim:
A method for performing Tandem Connection Monitoring (TCM) by a provider equipment or a customer equipment using a Multi-Protocol Label Switching (MPLS) Operation and Maintenance (OAM) packet in an MPLS network, the method comprising: calculating, by the provider equipment or the customer equipment, a Byte Interleaved Parity 16 (BIP-16) parity of a received TCM packet; determining whether there is an error by comparing the calculated BIP-16 parity with a BIP-16 parity stored in the received TCM packet; setting a value of ‘0’ or ‘1’ in an incoming error field allocated to a service provider level based on a determination result on the presence of an error; calculating a Byte Interleaved Parity 8 (BIP-8) parity of the received TCM packet and storing the calculated BIP-8 parity in a service provider TCM BIP-8 field of the received TCM packet; and when the calculated BIP-8 parity is stored in a service provider TCM BIP-8 field of the received TCM packet, the TCM parity is transmitted from the service provider level.