BGP-LS Extensions for Segment Routing based Enhanced VPN
draft-dong-idr-bgpls-sr-enhanced-vpn-00

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Last updated 2019-11-04
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IDR Working Group                                                J. Dong
Internet-Draft                                                     Z. Hu
Intended status: Standards Track                     Huawei Technologies
Expires: May 7, 2020                                    November 4, 2019

        BGP-LS Extensions for Segment Routing based Enhanced VPN
                draft-dong-idr-bgpls-sr-enhanced-vpn-00

Abstract

   Enhanced VPN (VPN+) is an enhancement to VPN services to support the
   needs of new applications, particularly including the applications
   that are associated with 5G services.  These applications require
   better isolation and have more stringent performance requirements
   than that can be provided with traditional overlay VPNs.  An enhanced
   VPN may be used for 5G transport network slicing, and will also be of
   use in more generic scenarios.  This document specifies BGP-LS based
   mechanism with necessary extensions to advertise the information of
   Segment Routing (SR) based virtual networks.  These virtual networks
   could be used as the underlay of enhanced VPN service.  The proposed
   mechanism is applicable to both segment routing with MPLS data plane
   (SR-MPLS) and segment routing with IPv6 data plane (SRv6).

Requirements Language

   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 RFC 2119 [RFC2119].

Status of This Memo

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

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

Dong & Hu                  Expires May 7, 2020                  [Page 1]
Internet-Draft        BGP-LS Extensions for SR VPN+        November 2019

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Advertisement of Transport Network Slice Definition . . . . .   3
     2.1.  Sub-TLVs of TNSD TLV  . . . . . . . . . . . . . . . . . .   4
   3.  Advertisement of Network Topology and Resource Attributes . .   6
     3.1.  Intra-domain Network Topology Advertisement . . . . . . .   6
       3.1.1.  MTR based Topology Advertisement  . . . . . . . . . .   6
       3.1.2.  Flex-Algo based Topology Advertisement  . . . . . . .   7
     3.2.  Intra-domain Resource Information Advertisement . . . . .   8
     3.3.  Inter-Domain Topology and Resource Information
           Advertisement . . . . . . . . . . . . . . . . . . . . . .   9
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Driven largely by needs arising from the 5G mobile network, the
   concept of network slicing has gained traction
   [NGMN-NS-Concept][TS23501][TS28530] . Network slicing requires to
   partition the physical network to several pieces to provide each
   network slice with the required networking, computing, and storage
   resources and functions to meet the requirement of slice tenants.  As
   specified in [I-D.ietf-teas-enhanced-vpn], a transport network slice
   is a virtual (logical) network with a particular network topology and
   a set of shared or dedicated network resources, which are used to
   provide the network slice consumer with the required connectivity,
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