IGP Extensions for Segment Routing based Enhanced VPN
draft-dong-lsr-sr-enhanced-vpn-01

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Last updated 2018-10-22
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LSR Working Group                                                J. Dong
Internet-Draft                                                 S. Bryant
Intended status: Standards Track                     Huawei Technologies
Expires: April 25, 2019                                 October 22, 2018

         IGP Extensions for Segment Routing based Enhanced VPN
                   draft-dong-lsr-sr-enhanced-vpn-01

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 form the underpin of 5G transport network slicing, and will
   also be of use in its own right.  This document describes how Multi-
   Topology Routing (MTR) as described in RFC 5120, RFC 4915 and
   RFC5340, can be extended to signal the network resources allocated in
   the underlay network to construct the customized virtual networks for
   enhanced VPN services, together with the Segment Routing Identifiers
   (SIDs) used to identify and access the network resources allocated
   for each virtual network in the data plane.

Status of This Memo

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Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Dong & Bryant            Expires April 25, 2019                 [Page 1]
Internet-Draft           IGP Extensions for VPN+            October 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Specification of Requirements . . . . . . . . . . . . . . . .   3
   3.  Overview of Approach  . . . . . . . . . . . . . . . . . . . .   3
   4.  SR Virtual Topology with Resource Guarantee . . . . . . . . .   4
     4.1.  Topology specific Link Resource Allocation and
           Identification  . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  Topology specific Node Resource Allocation and
           Identification  . . . . . . . . . . . . . . . . . . . . .   6
   5.  Multiple Services in SR Virtual Topology  . . . . . . . . . .   6
     5.1.  Common Service Types  . . . . . . . . . . . . . . . . . .   7
       5.1.1.  Best Effort . . . . . . . . . . . . . . . . . . . . .   7
       5.1.2.  Assured Bandwidth . . . . . . . . . . . . . . . . . .   7
       5.1.3.  Deterministic . . . . . . . . . . . . . . . . . . . .   8
   6.  Topology and Algorithm  . . . . . . . . . . . . . . . . . . .   8
   7.  SRv6 Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Fast Repair . . . . . . . . . . . . . . . . . . . . . . . . .   9
   9.  LAN interface . . . . . . . . . . . . . . . . . . . . . . . .  10
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  10
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   12. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     13.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   The framework for an enhanced virtual private network (VPN+) is
   described in [I-D.dong-teas-enhanced-vpn].

   Driven largely by needs arising from the 5G mobile network design,
   the concept of network slicing has gained traction.  There is a need
   to create a VPN service with enhanced isolation and performance
   characteristics.  Specifically, there is a need for a transport
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