Realizing Network Slices in IP/MPLS Networks
draft-bestbar-teas-ns-packet-00

Document Type Active Internet-Draft (individual)
Authors Tarek Saad  , Vishnu Beeram 
Last updated 2020-10-30
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TEAS Working Group                                               T. Saad
Internet-Draft                                                 V. Beeram
Intended status: Standards Track                        Juniper Networks
Expires: May 3, 2021                                    October 30, 2020

              Realizing Network Slices in IP/MPLS Networks
                    draft-bestbar-teas-ns-packet-00

Abstract

   Network slicing provides the ability to partition a physical network
   into multiple isolated logical networks of varying sizes, structures,
   and functions so that each slice can be dedicated to specific
   services or customers.  Network slices need to operate in parallel
   with varying degrees of isolation while providing slice elasticity in
   terms of network resource allocation.  The Differentiated Service
   (Diffserv) model allows for carrying multiple services on top of a
   single physical network by relying on compliant nodes to apply
   specific forwarding treatments on to packets that carry the
   respective Diffserv code point.  This document proposes a solution
   based on the Diffserv model to realize network slicing in IP/MPLS
   networks.  The proposed solution is agnostic to the path control
   technology used in the network slicing domain and allows service
   differentiation of traffic within a given network slice.

Status of This Memo

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   This Internet-Draft will expire on May 3, 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Saad & Beeram              Expires May 3, 2021                  [Page 1]
Internet-Draft           IP/MPLS Network Slicing            October 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Acronyms and Abbreviations  . . . . . . . . . . . . . . .   4
     1.3.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Network Resource Slicing Membership . . . . . . . . . . . . .   5
     2.1.  Dedicated Network Resources . . . . . . . . . . . . . . .   6
     2.2.  Shared Network Resources  . . . . . . . . . . . . . . . .   6
   3.  Path Selection  . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Approaches to Network Resource Slicing  . . . . . . . . . . .   7
     4.1.  Data Plane Network Resource Slicing . . . . . . . . . . .   7
     4.2.  Control Plane Network Resource Slicing  . . . . . . . . .   8
     4.3.  Data and Control Plane Network Resource Slicing . . . . .  10
   5.  Network Slice Instantiation . . . . . . . . . . . . . . . . .  11
     5.1.  Slice Intent  . . . . . . . . . . . . . . . . . . . . . .  12
     5.2.  Slice Per-Hop Definition  . . . . . . . . . . . . . . . .  12
       5.2.1.  Slice Data Plane Selector . . . . . . . . . . . . . .  13
       5.2.2.  Slice Network Resource Reservation  . . . . . . . . .  17
       5.2.3.  Slice Per-Hop Behavior  . . . . . . . . . . . . . . .  18
       5.2.4.  Slice Topology Membership . . . . . . . . . . . . . .  19
     5.3.  Network Slice Boundary  . . . . . . . . . . . . . . . . .  19
       5.3.1.  Network Slice Edge Nodes  . . . . . . . . . . . . . .  19
       5.3.2.  Network Slice Interior Nodes  . . . . . . . . . . . .  20
       5.3.3.  Network Slice Incapable Nodes . . . . . . . . . . . .  20
       5.3.4.  Combining Network Resource Slicing Approaches . . . .  21
     5.4.  Slice Traffic Steering  . . . . . . . . . . . . . . . . .  22
   6.  Control Plane Extensions  . . . . . . . . . . . . . . . . . .  22
   7.  Applicability to Path Control Technologies  . . . . . . . . .  23
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  23
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