IGP Extensions for Segment Routing based Enhanced VPN
draft-dong-lsr-sr-enhanced-vpn-04

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Last updated 2020-06-23
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LSR Working Group                                                J. Dong
Internet-Draft                                                     Z. Hu
Intended status: Standards Track                                   Z. Li
Expires: December 25, 2020                           Huawei Technologies
                                                                 X. Tang
                                                                 R. Pang
                                                            China Unicom
                                                              L. JooHeon
                                                                   LG U+
                                                               S. Bryant
                                                  Futurewei Technologies
                                                           June 23, 2020

         IGP Extensions for Segment Routing based Enhanced VPN
                   draft-dong-lsr-sr-enhanced-vpn-04

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
   enhanced 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.  To meet the requirement of enhanced
   VPN services, a number of Virtual Transport Networks (VTN) need to be
   created, each with a subset of the underlay network topology and a
   set of network resources allocated to meet the requirement of a
   specific VPN+ service, or a group of VPN+ services.

   This document specifies the IGP mechanisms with necessary extensions
   to build a set of Segment Routing (SR) based VTNs.  The VTNs 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.

Dong, et al.            Expires December 25, 2020               [Page 1]
Internet-Draft         IGP Extensions for SR VPN+              June 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  VTN Definition Advertisement  . . . . . . . . . . . . . . . .   4
   3.  Advertisement of VTN Topology Attribute . . . . . . . . . . .   5
     3.1.  MTR based Topology Advertisement  . . . . . . . . . . . .   5
     3.2.  Flex-Algo based Topology Advertisement  . . . . . . . . .   6
   4.  Advertisement of VTN Resource Attribute . . . . . . . . . . .   7
   5.  Advertisement of VTN specific Data Plane Identifiers  . . . .   8
     5.1.  Advertisement of VTN-specific MPLS SIDs . . . . . . . . .   9
     5.2.  Advertisement of VTN-specific SRv6 Locators . . . . . . .  11
     5.3.  Advertisement of Dedicated Data Plane VTN IDs . . . . . .  11
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  12
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
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