Much of the original MPLS design, architecture and mechanisms can be used in transport
A transport network provides efficient, reliable, qualitative and scalable connectivity
over which multiple services can be supported, with a clear separation between the operations
and management of the service layer from those of the transport layer.
However, additional architectural elements and mechanisms are needed to optimize MPLS operation in these transport networks, and the work on the Transport Profile of MPLS (MPLS-TP) extends the
MPLS technology accordingly.
These extensions are intended to strengthen the case for adopting MPLS technology in new market segments.
• Section 1 of this paper introduces the key market drivers for extending MPLS.
• Section 2 describes the MPLS extensions needed to support the transport profile (MPLS-TP),
addressing transport requirements jointly provided by the IETF and ITU-T. The relationship with existing mechanisms is explained.
• Section 3 shows how unified MPLS technology can be applied in Broadband Multi-Service
Architectures and introduces some considerations regarding the choice between static and
dynamic provisioning and management.
• Section 4 presents the opportunities that the extended technology can bring to mobile
backhauling, a key application now supported by broadband networks.
The MPLS architectural elements and mechanisms are defined by the IETF. The role of the
Broadband Forum is to enable interoperable MPLS-based solutions to support broadband
services (e.g. Mobile backhaul, Enterprise and residential services).
The Broadband Forum fulfills this role by defining the end-to-end network architecture and specifying the appropriate nodal requirements. It also defines MPLS conformance tests, certifies compliant MPLS implementations and supports interoperability testing events.
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