This document outlines the requirements for Traffic Engineering over Multiprotocol Label Switching (MPLS). It identifies the functional capabilities needed to implement policies that enable efficient and reliable network operations in an MPLS domain. These capabilities help optimize network resource utilization and enhance traffic performance characteristics. The document discusses the role of MPLS in Traffic Engineering, highlighting its potential to provide most of the functionality available from overlay models in an integrated and cost-effective manner. It also addresses the limitations of current Interior Gateway Protocol (IGP) control mechanisms and proposes augmented capabilities for Traffic Engineering over MPLS, including attributes for traffic trunks, resource attributes, and constraint-based routing. The document emphasizes the importance of dynamic resource allocation, load balancing, and path selection to achieve efficient and reliable network operations. It also discusses the need for resilience, policing, and preemption attributes to ensure traffic trunks can adapt to network changes and failures. The document concludes with a discussion on the importance of constraint-based routing in MPLS domains and the need for close integration between MPLS and routing protocols to support Traffic Engineering.This document outlines the requirements for Traffic Engineering over Multiprotocol Label Switching (MPLS). It identifies the functional capabilities needed to implement policies that enable efficient and reliable network operations in an MPLS domain. These capabilities help optimize network resource utilization and enhance traffic performance characteristics. The document discusses the role of MPLS in Traffic Engineering, highlighting its potential to provide most of the functionality available from overlay models in an integrated and cost-effective manner. It also addresses the limitations of current Interior Gateway Protocol (IGP) control mechanisms and proposes augmented capabilities for Traffic Engineering over MPLS, including attributes for traffic trunks, resource attributes, and constraint-based routing. The document emphasizes the importance of dynamic resource allocation, load balancing, and path selection to achieve efficient and reliable network operations. It also discusses the need for resilience, policing, and preemption attributes to ensure traffic trunks can adapt to network changes and failures. The document concludes with a discussion on the importance of constraint-based routing in MPLS domains and the need for close integration between MPLS and routing protocols to support Traffic Engineering.