Packet Network Slicing using Segment Routing
draft-peng-lsr-network-slicing-00

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Networking Working Group                                    Shaofu. Peng
Internet-Draft                                                 Ran. Chen
Intended status: Standards Track                         Gregory. Mirsky
Expires: August 29, 2019                                 ZTE Corporation
                                                       February 25, 2019

              Packet Network Slicing using Segment Routing
                   draft-peng-lsr-network-slicing-00

Abstract

   This document presents a mechanism aimed at providing a solution for
   network slicing in the transport network for 5G services.  The
   proposed mechanism uses a unified administrative instance identifier
   to distinguish different virtual network resources for both intra-
   domain and inter-domain network slicing scenarios.  Combined with the
   segment routing technology, the mechanism could be used for both
   best-effort and traffic engineered services for tenants.

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   This Internet-Draft will expire on August 29, 2019.

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Peng, et al.             Expires August 29, 2019                [Page 1]
Internet-Draft       Packet Network Slicing using SR       February 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
   3.  Overview of Mechanism . . . . . . . . . . . . . . . . . . . .   3
   4.  Resource Allocation per AII . . . . . . . . . . . . . . . . .   5
     4.1.  L3 Link Resource AII Configuration  . . . . . . . . . . .   5
     4.2.  L2 Link Resource AII Configuration  . . . . . . . . . . .   5
     4.3.  Node Resource AII Configuration . . . . . . . . . . . . .   6
   5.  Interworking with SR Flex-algorithm . . . . . . . . . . . . .   6
     5.1.  Best-effort Service AII-specific  . . . . . . . . . . . .   7
     5.2.  Traffic Engineering service AII-specific  . . . . . . . .   7
   6.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     6.1.  intra-domain network slicing  . . . . . . . . . . . . . .   8
     6.2.  inter-domain network slicing via BGP-LS . . . . . . . . .   9
     6.3.  inter-domain network slicing via BGP-LU . . . . . . . . .  11
   7.  Implementation suggestions  . . . . . . . . . . . . . . . . .  11
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   11. Normative references  . . . . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   According to 5G context, network slicing is the collection of a set
   of technologies to create specialized, dedicated logical networks as
   a service (NaaS) in support of network service differentiation and
   meeting the diversified requirements from vertical industries.
   Through the flexible and customized design of functions, isolation
   mechanisms, and operation and management (O&M) tools, network slicing
   is capable of providing dedicated virtual networks over a shared
   infrastructure.  A Network slice instance (NSI) is the realization of
   network slicing concept.  It is an E2E logical network, which
   comprises of a group of network functions, resources, and connection
   relationships.  An NSI typically covers multiple technical domains,
   which includes a terminal, access network (AN), transport network
   (TN) and a core network (CN), as well as DC domain that hosts third-
   party applications from vertical industries.  Different NSIs may have
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