Segment Routing Policy for Traffic Engineering
Segment routing allows a headend node to steer a packet flow along any desired path. Intermediate per-flow states are eliminated due to source routing. The headend node is said to steer a flow into a segment routing policy. The header of a packet steered in an segment routing policy is augmented with the ordered list of segments associated with that segment routing policy.
The path of a segment routing policy is an ordered list of segments and can be an explicit path or a dynamic path:
• For a dynamic candidate-path, the head-end computes the ordered list of segments based on certain user-specified optimization objectives and set of constraints.
• For an explicit candidate-path, the ordered list of segments can be explicitly specified by the operator directly via commands or PCEP controller.
This chapter shows how to configure a segment routing policy for traffic engineering using dynamic paths and explicit paths.
Last modified date: 10/20/2023