[Teas] Document Action: 'Use Cases for a PCE as a Central Controller (PCECC)' to Informational RFC (draft-ietf-teas-pcecc-use-cases-18.txt)

The IESG <iesg-secretary@ietf.org> Fri, 31 May 2024 19:42 UTC

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Subject: [Teas] Document Action: 'Use Cases for a PCE as a Central Controller (PCECC)' to Informational RFC (draft-ietf-teas-pcecc-use-cases-18.txt)
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The IESG has approved the following document:
- 'Use Cases for a PCE as a Central Controller (PCECC)'
  (draft-ietf-teas-pcecc-use-cases-18.txt) as Informational RFC

This document is the product of the Traffic Engineering Architecture and
Signaling Working Group.

The IESG contact persons are Gunter Van de Velde, Jim Guichard and John
Scudder.

A URL of this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-teas-pcecc-use-cases/




Technical Summary

   The PCE is a core component of a Software-Defined Networking (SDN)
   system.  It can be used to compute optimal paths for network traffic
   and update existing paths to reflect changes in the network or
   traffic demands.  PCE was developed to derive traffic-engineered
   paths in MPLS networks, which are supplied to the head end of the
   paths using the Path Computation Element Communication Protocol
   (PCEP).

   SDN has a much broader applicability than signal MPLS traffic-
   engineered (TE) paths and the PCE may be used to determine paths in a
   range of use cases including static Label Switched Paths (LSPs),
   Segment Routing (SR), Service Function Chaining (SFC), and most forms
   of a routed or switched network.  It is, therefore, reasonable to
   consider PCEP as a control protocol for use in these environments to
   allow the PCE to be fully enabled as a central controller.

   A PCE as a 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.  This document describes
   general considerations for PCECC deployment and examines its
   applicability and benefits, as well as its challenges and
   limitations, through a number of use cases.  PCEP extensions which
   are required for the PCECC use cases are covered in separate
   documents.

Personnel

   The Document Shepherd for this document is Vishnu Pavan Beeram. The
   Responsible Area Director is Jim Guichard.