PCEP Extensions for Segment Routing leveraging the IPv6 data plane

The information below is for an old version of the document
Document Type Expired Internet-Draft (pce WG)
Last updated 2019-10-09 (latest revision 2019-04-07)
Replaces draft-negi-pce-segment-routing-ipv6
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state WG Document
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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This Internet-Draft is no longer active.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


The Source Packet Routing in Networking (SPRING) architecture describes how Segment Routing (SR) can be used to steer packets through an IPv6 or MPLS network using the source routing paradigm. SR enables any head-end node to select any path without relying on a hop-by-hop signaling technique (e.g., LDP or RSVP-TE). It depends only on "segments" that are advertised by Link- State IGPs. A Segment Routed Path can be derived from a variety of mechanisms, including an IGP Shortest Path Tree (SPT), explicit configuration, or a Path Computation Element (PCE). Since SR can be applied to both MPLS and IPv6 forwarding plane, a PCE should be able to compute SR-Path for both MPLS and IPv6 forwarding plane. This document describes the extensions required for SR support for IPv6 data plane in Path Computation Element communication Protocol (PCEP). The PCEP extension and mechanism to support SR-MPLS is described in [I-D.ietf-pce-segment-routing]. This document extends it to support SRv6 (SR over IPv6).


Mahendra Negi (mahendrasingh@huawei.com)
Cheng Li (chengli13@huawei.com)
Siva Sivabalan (msiva@cisco.com)
Prejeeth Kaladharan (prejeeth@rtbrick.com)
Yongqing Zhu (zhuyq.gd@chinatelecom.cn)

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