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A FINANCIAL ANALYSIS OF THE OPERATIONAL BENEFITS OF MPLS-TP TRANSPORT NETWORKS

MPLS-TP is a standard under development by the IETF for packet optical transport networks. The key objective of the IETF effort is to provide a universal standard for packet optical transport that maintains many of the operational characteristics associated with SONET/SDH and OTN and is compatible with existing IP/MPLS networks.

An important aspect of MPLS-TP is OAM. The requirements of MPLS-TP OAM have been jointly approved by the ITU-T and the IETF and have been published as RFC 5860, “Requirements for OAM in MPLS-TP Networks”. The basis of the requirements, and a keystone of the MPLS-TP OAM protocols, is that they should provide the complete set of OAM capabilities that are both supported by legacy transport network technologies and applicable in packet-switched networks. Recently there has been a proposal in the IETF to allow a modified version of Y.1731, the OAM protocol used in Carrier Ethernet networks, to be used for MPLS-TP OAM. For the purposes of this paper we will call this approach “Proprietary Transport Extensions” or PTE.

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