Packet Network Slicing using Segment Routing
draft-peng-teas-network-slicing-01

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TEAS                                                        Shaofu. Peng
Internet-Draft                                                 Ran. Chen
Intended status: Standards Track                         Gregory. Mirsky
Expires: May 7, 2020                                     ZTE Corporation
                                                            Fengwei. Qin
                                                            China Mobile
                                                        November 4, 2019

              Packet Network Slicing using Segment Routing
                   draft-peng-teas-network-slicing-01

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.

Status of This Memo

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   This document is subject to BCP 78 and the IETF Trust's Legal
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Peng, et al.               Expires May 7, 2020                  [Page 1]
Internet-Draft       Packet Network Slicing using SR       November 2019

   carefully, as they describe your rights and restrictions with respect
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Network Slicing Requirements  . . . . . . . . . . . . . . . .   3
     2.1.  Dedicated Virtual Networks  . . . . . . . . . . . . . . .   3
     2.2.  End-to-End Slicing  . . . . . . . . . . . . . . . . . . .   3
     2.3.  Unified NSI . . . . . . . . . . . . . . . . . . . . . . .   4
     2.4.  Traffic Engineering . . . . . . . . . . . . . . . . . . .   4
     2.5.  Summarized Requirements . . . . . . . . . . . . . . . . .   5
   3.  Conventions used in this document . . . . . . . . . . . . . .   5
   4.  Overview of Existing Identifiers  . . . . . . . . . . . . . .   5
     4.1.  AG and EAG Bit  . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Multi-Topology Identifier . . . . . . . . . . . . . . . .   6
     4.3.  SR Policy Color . . . . . . . . . . . . . . . . . . . . .   6
     4.4.  Flex-algorithm Identifier . . . . . . . . . . . . . . . .   7
     4.5.  New Slice-based Identifier Introduced . . . . . . . . . .   7
   5.  Overview of AII-based Mechanism . . . . . . . . . . . . . . .   8
   6.  Resource Allocation per AII . . . . . . . . . . . . . . . . .  10
     6.1.  L3 Link Resource AII Configuration  . . . . . . . . . . .  10
     6.2.  L2 Link Resource AII Configuration  . . . . . . . . . . .  11
     6.3.  Node Resource AII Configuration . . . . . . . . . . . . .  11
   7.  Combined with SR Flex-algorithm for Stack Depth Optimization   12
     7.1.  Best-effort Service AII-specific  . . . . . . . . . . . .  12
     7.2.  Traffic Engineering service AII-specific  . . . . . . . .  12
   8.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  intra-domain network slicing  . . . . . . . . . . . . . .  13
     8.2.  inter-domain network slicing via BGP-LS . . . . . . . . .  14
     8.3.  inter-domain network slicing via BGP-LU . . . . . . . . .  16
   9.  Implementation suggestions  . . . . . . . . . . . . . . . . .  17
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  18
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  18
   13. Normative references  . . . . . . . . . . . . . . . . . . . .  18
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  20
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