Advertising Segment Routing Policies in BGP

The information below is for an old version of the document
Document Type Expired Internet-Draft (idr WG)
Authors Stefano Previdi  , Clarence Filsfils  , Ketan Talaulikar  , Paul Mattes  , Eric Rosen  , Dhanendra Jain  , Steven Lin 
Last updated 2020-05-21 (latest revision 2019-11-18)
Replaces draft-previdi-idr-segment-routing-te-policy
Stream IETF
Intended RFC status Proposed Standard
Expired & archived
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines a new BGP SAFI with a new NLRI in order to advertise a candidate path of a Segment Routing (SR) Policy. An SR Policy is a set of candidate paths, each consisting of one or more segment lists. The headend of an SR Policy may learn multiple candidate paths for an SR Policy. Candidate paths may be learned via a number of different mechanisms, e.g., CLI, NetConf, PCEP, or BGP. This document specifies the way in which BGP may be used to distribute SR Policy candidate paths. New sub-TLVs for the Tunnel Encapsulation Attribute are defined for signaling information about these candidate paths.


Stefano Previdi (
Clarence Filsfils (
Ketan Talaulikar (
Paul Mattes (
Eric Rosen (
Dhanendra Jain (
Steven Lin (

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