This document specifies the requirements of an MPLS Transport Profile
(MPLS-TP). This document is a product of a joint effort of the
International Telecommunications Union (ITU) and IETF to include an
MPLS Transport Profile within the IETF MPLS and PWE3 architectures to
support the capabilities and functionalities of a packet transport
network as defined by International Telecommunications Union –
Telecommunications Standardization Sector (ITU-T).

This work is based on two sources of requirements: MPLS and PWE3
architectures as defined by IETF, and packet transport networks as
defined by ITU-T.

The requirements expressed in this document are for the behavior of
the protocol mechanisms and procedures that constitute building
blocks out of which the MPLS Transport Profile is constructed. The
requirements are not implementation requirements.