IS-IS Extensions to Support Packet Network Slicing using Segment Routing
draft-zch-lsr-isis-network-slicing-01

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Networking Working Group                                   Yongqing. Zhu
Internet-Draft                                             China Telecom
Intended status: Standards Track                               Ran. Chen
Expires: January 7, 2020                                    Shaofu. Peng
                                                         ZTE Corporation
                                                            July 6, 2019

IS-IS Extensions to Support Packet Network Slicing using Segment Routing
                 draft-zch-lsr-isis-network-slicing-01

Abstract

   [I-D.peng-lsr-network-slicing] defines a unified administrative
   instance identifier to distinguish different virtual network
   resources for both intra-domain and inter-domain network slicing
   scenarios.  This draft describes the IS-IS extensions required to
   support Packet Network Slicing using Segment Routing.

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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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 7, 2020.

Copyright Notice

   Copyright (c) 2019 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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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of

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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.  Conventions used in this document . . . . . . . . . . . . . .   2
   3.  Advertising AII information as a new TE parameter of a link .   2
   4.  Advertising prefix-SID per AII information  . . . . . . . . .   4
   5.  Advertising Adjacency-SID per AII information . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  AII list sub-TLV  . . . . . . . . . . . . . . . . . . . .   6
     6.2.  Prefix-SID for AII sub-TLV  . . . . . . . . . . . . . . .   6
     6.3.  Adjacency -SID for AII sub-TLV  . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     9.1.  Normative references  . . . . . . . . . . . . . . . . . .   6
     9.2.  Informative references  . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

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.  The slices may be seen as
   virtual networks.  [I-D.ietf-teas-enhanced-vpn] described a framework
   to create virtual networks in a packet network.
   [I-D.peng-lsr-network-slicing] specifies a detailed mechanism to
   signal association of shared resources required to create and manage
   an NSI called "Administrative Instance Identifier" (AII).

   This draft describes the IS-IS extensions required to distribute AII
   information in an AS.

2.  Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC2119.

3.  Advertising AII information as a new TE parameter of a link

   [RFC5305] describes extensions to the Intermediate System to
   Intermediate System (IS-IS) protocol to support Traffic Engineering
   (TE).

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   AII can be used to color links to partition underlay resource.  This
   document defines a new extension of the existing IGP-TE