PCE TE Constraints for Network Slicing
draft-peng-pce-te-constraints-02

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PCE                                                              S. Peng
Internet-Draft                                                  Q. Xiong
Intended status: Standards Track                         ZTE Corporation
Expires: June 1, 2020                                             F. Qin
                                                            China Mobile
                                                       November 29, 2019

                 PCE TE Constraints for Network Slicing
                    draft-peng-pce-te-constraints-02

Abstract

   This document proposes a set of extensions for PCEP to support the
   constraints for network slicing during path computation, e.g, IGP
   instance, virtual network, specific application, color template and
   FA-id etc.

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Peng, et al.              Expires June 1, 2020                  [Page 1]
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   3.  PCEP Extensions for Constraints . . . . . . . . . . . . . . .   3
     3.1.  Source Protocol Object  . . . . . . . . . . . . . . . . .   3
     3.2.  Multi-topology Object . . . . . . . . . . . . . . . . . .   4
     3.3.  The AII Object  . . . . . . . . . . . . . . . . . . . . .   5
     3.4.  Application Specific Object . . . . . . . . . . . . . . .   6
     3.5.  The Color Object  . . . . . . . . . . . . . . . . . . . .   7
     3.6.  The FA-id Object  . . . . . . . . . . . . . . . . . . . .   8
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   [RFC5440] describes the Path Computation Element Protocol (PCEP)
   which is used between a Path Computation Element (PCE) and a Path
   Computation Client (PCC) (or other PCE) to enable computation of
   Multi-protocol Label Switching (MPLS) for Traffic Engineering Label
   Switched Path (TE LSP).  PCEP Extensions for the Stateful PCE Model
   [RFC8231] describes a set of extensions to PCEP to enable active
   control of MPLS-TE and Generalized MPLS (GMPLS) tunnels.  As depicted
   in [RFC4655], a PCE MUST be able to compute the path of a TE LSP by
   operating on the TED and considering bandwidth and other constraints
   applicable to the TE LSP service request.  The constraint parameters
   are provided such as metric, bandwidth, delay, affinity, etc.
   However these parameters can't meet the network slicing requirements.

   According to 5G context, network slicing is the collection of a set
   of technologies to support network service differentiation and
   meeting the diversified requirements from vertical industries.  The
   slices may be seen as virtual networks and partition the network
   resources into sub-topologies in transport network.  Multiple
   existing identifiers could be used to identify the virtual network
   resource and viewed as constraints of network slicing when PCE is
   deployed.

   A PCE always perform path computation based on the network topology
   information collected through BGP-LS [RFC7752].  BGP-LS can get
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