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PCEP Extensions for Segment Routing leveraging the IPv6 data plane

Document Type Replaced Internet-Draft (pce WG)
Authors Mahendra Singh Negi , Cheng Li , Siva Sivabalan , Prejeeth Kaladharan
Last updated 2019-03-08 (Latest revision 2019-02-06)
Replaced by draft-ietf-pce-segment-routing-ipv6
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-pce-segment-routing-ipv6
Consensus boilerplate Unknown
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Responsible AD (None)
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This Internet-Draft is no longer active.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. Segment Routing (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, Segment Routing 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 draft describes the extensions required for Segment Routing support for IPv6 data plane in Path Computation Element communication Protocol (PCEP).


Mahendra Singh Negi
Cheng Li
Siva Sivabalan
Prejeeth Kaladharan

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