Segment Routing Architecture

Document Type Replaced Internet-Draft (individual)
Authors Clarence Filsfils  , Stefano Previdi  , Ahmed Bashandy  , Bruno Decraene  , Stephane Litkowski  , Martin Horneffer  , Igor Milojevic  , Rob Shakir  , Saku Ytti  , Wim Henderickx  , Jeff Tantsura  , Edward Crabbe 
Last updated 2014-05-14 (latest revision 2013-10-21)
Replaced by draft-filsfils-spring-segment-routing
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Segment Routing (SR) leverages the source routing paradigm. A node steers a packet through a controlled set of instructions, called segments, by prepending the packet with an SR header. A segment can represent any instruction, topological or service-based. A segment can have a local semantic to an SR node or global within an SR domain. SR allows to enforce a flow through any topological path and service chain while maintaining per-flow state only at the ingress node to the SR domain. The Segment Routing architecture can be directly applied to the MPLS dataplane with no change on the forwarding plane. IGP-based segments require minor extension to the existing link-state routing protocols. Segment Routing can also be applied to IPv6 with a new type of routing extension header.


Clarence Filsfils (
Stefano Previdi (
Ahmed Bashandy (
Bruno Decraene (
Stephane Litkowski (
Martin Horneffer (
Igor Milojevic (
Rob Shakir (
Saku Ytti (
Wim Henderickx (
Jeff Tantsura (
Edward Crabbe (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)