This document outlines the requirements for Traffic Engineering over Multiprotocol Label Switching (MPLS). It identifies the functional capabilities required to implement policies that facilitate efficient and reliable network operations in an MPLS domain. These capabilities can be used to optimize the utilization of network resources and enhance traffic-oriented performance characteristics. The document discusses the basic functions of Traffic Engineering in the Internet, the applicability of MPLS to Traffic Engineering, and the fundamental problems related to Traffic Engineering over MPLS. It also presents the augmented capabilities required for Traffic Engineering over MPLS, including traffic trunk attributes, resource attributes, and constraint-based routing. The document emphasizes the importance of Traffic Engineering in managing network resources efficiently and reliably, particularly in large Internet backbones. It highlights the limitations of current IGP control mechanisms and the need for more flexible and efficient solutions. The document also discusses the importance of resilience, priority, and preemption attributes in ensuring the reliability and performance of traffic trunks. Overall, the document provides a comprehensive overview of the requirements and capabilities needed for effective Traffic Engineering over MPLS.This document outlines the requirements for Traffic Engineering over Multiprotocol Label Switching (MPLS). It identifies the functional capabilities required to implement policies that facilitate efficient and reliable network operations in an MPLS domain. These capabilities can be used to optimize the utilization of network resources and enhance traffic-oriented performance characteristics. The document discusses the basic functions of Traffic Engineering in the Internet, the applicability of MPLS to Traffic Engineering, and the fundamental problems related to Traffic Engineering over MPLS. It also presents the augmented capabilities required for Traffic Engineering over MPLS, including traffic trunk attributes, resource attributes, and constraint-based routing. The document emphasizes the importance of Traffic Engineering in managing network resources efficiently and reliably, particularly in large Internet backbones. It highlights the limitations of current IGP control mechanisms and the need for more flexible and efficient solutions. The document also discusses the importance of resilience, priority, and preemption attributes in ensuring the reliability and performance of traffic trunks. Overall, the document provides a comprehensive overview of the requirements and capabilities needed for effective Traffic Engineering over MPLS.