[Pce] I-D Action: draft-ietf-pce-pcep-extension-pce-controller-sr-02.txt

internet-drafts@ietf.org Fri, 26 March 2021 06:13 UTC

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Subject: [Pce] I-D Action: draft-ietf-pce-pcep-extension-pce-controller-sr-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Path Computation Element WG of the IETF.

        Title           : PCEP Procedures and Protocol Extensions for Using PCE as a Central Controller (PCECC) for Segment Routing (SR) MPLS Segment Identifier (SID) Allocation and Distribution.
        Authors         : Zhenbin Li
                          Shuping Peng
                          Mahendra Singh Negi
                          Quintin Zhao
                          Chao Zhou
	Filename        : draft-ietf-pce-pcep-extension-pce-controller-sr-02.txt
	Pages           : 35
	Date            : 2021-03-25

   The Path Computation Element (PCE) is a core component of Software-
   Defined Networking (SDN) systems.

   A PCE-based Central Controller (PCECC) can simplify the processing of
   a distributed control plane by blending it with elements of SDN and
   without necessarily completely replacing it.  Thus, the LSP can be
   calculated/set up/initiated and the label forwarding entries can also
   be downloaded through a centralized PCE server to each network device
   along the path while leveraging the existing PCE technologies as much
   as possible.

   This document specifies the procedures and PCEP extensions when a
   PCE-based controller is also responsible for configuring the
   forwarding actions on the routers, in addition to computing the paths
   for packet flows in a segment routing (SR) network and telling the
   edge routers what instructions to attach to packets as they enter the
   network.  PCECC is further enhanced for SR-MPLS SID (Segment
   Identifier) allocation and distribution.

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