Segment routing

Segment routing, a form of computer networking, is a modern variant of source routing that is being developed within the SPRING and IPv6 working groups of the IETF. In a segment routed network, an ingress node may prepend a header to packets that contain a list of segments, which are instructions that are executed on subsequent nodes in the network. These instructions may be forwarding instructions, such as an instruction to forward a packet to a specific destination or interface.

Segment routing works either on top of a MPLS network or on an IPv6 network.[1][2] In an MPLS network, segments are encoded as MPLS labels. Under IPv6, a new header called a Segment Routing Header (SRH) is used. Segments in a SRH are encoded in a list of IPv6 addresses.

See also

References
  1. "RFC 8402, Segment Routing Architecture". 2017-08-20. Retrieved 2018-06-15.
  2. "IPv6 Segment Routing Header (SRH)". 2018-10-22. Retrieved 2018-12-22.


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