Skip to main content

SR Policy Extensions for Path Segment and Bidirectional Path

Document Type Expired Internet-Draft (idr WG)
Expired & archived
Authors Cheng Li , China Telecom , Mach Chen , Jie Dong , Zhenbin Li
Last updated 2020-02-09 (Latest revision 2019-08-08)
Replaces draft-li-idr-sr-policy-path-segment-distribution
RFC stream Internet Engineering Task Force (IETF)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


A Segment Routing (SR) policy is a set of candidate SR paths consisting of one or more segment lists with necessary path attributes. For each SR path, it may also have its own path attributes, and Path Segment is one of them. A Path Segment is defined to identify an SR path, which can be used for performance measurement, path correlation, and end-2-end path protection. Path Segment can be also used to correlate two unidirctional SR paths into a bidirectional SR path which is required in some scenarios, for example, mobile backhaul transport network. This document defines extensions to BGP to distribute SR policies carrying Path Segment and bidirectional path information.


Cheng Li
China Telecom
Mach Chen
Jie Dong
Zhenbin Li

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