BGP Extensions to Support Packet Network Slicing in SR Policy
draft-liu-idr-bgp-network-slicing-01

Document Type Active Internet-Draft (individual)
Authors Liu Yao  , Shaofu Peng 
Last updated 2020-10-15
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IDR Group                                                       Yao. Liu
Internet-Draft                                              Shaofu. Peng
Intended status: Standards Track                         ZTE Corporation
Expires: April 18, 2021                                 October 15, 2020

     BGP Extensions to Support Packet Network Slicing in SR Policy
                  draft-liu-idr-bgp-network-slicing-01

Abstract

   [I-D.peng-teas-network-slicing] defines a unified TN-slice
   identifier, AII(administrative instance identifier), to indicate the
   topology, computing, storage resources of the dedicated virtual
   network for both intra-domain and inter-domain network slicing
   scenarios.  This document defines extensions to BGP in order to
   advertise AII in SR policies.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on April 18, 2021.

Copyright Notice

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

   This document is subject to BCP 78 and the IETF Trust's Legal
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   include Simplified BSD License text as described in Section 4.e of

Liu & Peng               Expires April 18, 2021                 [Page 1]
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  SR policy with AII  . . . . . . . . . . . . . . . . . . . . .   2
   3.  Operations  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   For a packet network, network slicing requires the underlying network
   to support partitioning of the network resources to provide the
   client with dedicated (private) networking, computing, and storage
   resources drawn from a shared pool.

   [I-D.peng-teas-network-slicing] defines a unified TN-slice
   identifier, AII(administrative instance identifier), to indicate the
   topology, computing, storage resources of the dedicated virtual
   network for both intra-domain and inter-domain network slicing
   scenarios, and how to compute SR-BE or SR-TE path according to TN-
   slice Identifier combined with other creteria.

   [I-D.ietf-spring-segment-routing-policy] details the concepts of SR
   Policy and steering into an SR
   Policy.[I-D.ietf-idr-segment-routing-te-policy] specifies the way to
   use BGP to distribute one or more of the candidate paths of an SR
   Policy to the headend of that policy.

   This document defines extensions to BGP in order to advertise AII in
   SR-TE policies.

2.  SR policy with AII

   To distinguish forwarding behavior of different virtual networks,
   each segment lists in SR policy need to be computed within the scope
   of TN-slice identified by AII.  As AII has global significance, all
   segments of the same segment list can share a single AII.  This
   document defines a new AII sub-TLV in Segment List Sub-TLV to
   indicate which slice this segment list belongs to,

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