Segment Routing traffic engineering

SR-TE Policy Architecture

Segment Routing Traffic Engineering uses SR policies to steer traffic along specific paths through the network. An SR-TE policy consists of a headend router, a color identifying the intent, and an endpoint destination. Each policy contains one or more candidate paths, each specifying a segment list that encodes the explicit route. The headend router installs the active candidate path into the forwarding table and encapsulates matching traffic with the segment list. Unlike RSVP-TE, SR-TE does not signal state on intermediate routers — the path is entirely encoded in the packet header. This…