- Background and Motivation:
- Traditional transport networks, based on technologies like SDH/SONET, were primarily circuit-switched and provided fixed bandwidth granularity services.
- However, as networks evolve to carry more packets, there’s a need to simplify packet transport in access, aggregation, and metro domains.
- MPLS (Multiprotocol Label Switching) is widely used for packet transport in core networks. To align packet networking with traditional transport models, MPLS-TP was standardized.
- What Is MPLS-TP?:
- MPLS-TP extends MPLS to support traditional transport operational models.
- It provides packet-based transport capabilities, including point-to-point (P2P), point-to-multipoint (P2MP), and multipoint-to-multipoint (MP2MP) connections.
- MPLS-TP is defined by both the IETF (Internet Engineering Task Force) and ITU-T (International Telecommunication Union – Telecommunication Standardization Sector).
- Key Features of MPLS-TP:
- Label Switched Paths (LSPs): These are bidirectional and co-routed. Each LSP consists of two unidirectional paths supported by the MPLS forwarding infrastructure.
- TP Tunnels: A TP tunnel comprises a pair of unidirectional tunnels, providing a bidirectional LSP.
- Benefits of MPLS-TP:
- Simplified Operations: MPLS-TP simplifies packet transport, reducing capital expenditures (CapEx) and operational expenses (OpEx).
- Client-Server Relationship: MPLS-TP allows independent management of client (customer) and server (operator) networks while maintaining their functional relationship.
- Interconnection: MPLS-TP enables interconnection between MPLS-based client networks and operator networks for managed-bandwidth services.
- Complementary to IP/MPLS:
- MPLS-TP and IP/MPLS are complementary. MPLS-TP focuses on transport-specific requirements, while IP/MPLS handles broader networking needs.
- Cisco actively supports MPLS-TP and its integration with IP/MPLS solutions.
What is MPLS TP multiprotocol label switching traffic profile
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