Architecture for Overlay Virtual Sub-Network Interconnection
draft-ao-nvo3-overlay-subnet-architecture-02

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00
• 01
• 02

NVO3 WG                                                            T. Ao
Internet-Draft                                           ZTE Corporation
Intended status: Standards Track                               G. Mirsky
Expires: December 7, 2019                                      ZTE Corp.
                                                                  Y. Fan
                                                           China Telecom
                                                            June 5, 2019

      Architecture for Overlay Virtual Sub-Network Interconnection
              draft-ao-nvo3-overlay-subnet-architecture-02

Abstract

   An virtualized overlay network may be divided into several subnets
   for the reasons of geographical location, management, or using
   different technologies being used.  For example, different customer
   have their own preference.  But all these subnets need to work
   together to provide an end-to-end connectionif in a virtual network,
   An extended architecture of the NVO3 and propose a new component to
   provide the connection fucntion are introduced in this document.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 December 7, 2019.

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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Ao, et al.              Expires December 7, 2019                [Page 1]
Internet-Draft            overlay interconnect                 June 2019

   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   3.  Architecture for subnet . . . . . . . . . . . . . . . . . . .   4
     3.1.  Stitching NVE . . . . . . . . . . . . . . . . . . . . . .   5
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     5.2.  Informational References  . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Background

   Network virtualization using Overlays over Layer 3 (NVO3) is a
   technology that is used to address issues that arise in building
   large, multi-tenant data centers that make extensive use of server
   virtualization.

   As described [I-D.defoy-coms-subnet-interconnection] and
   [I-D.homma-coms-slice-gateway], for network slicing in 5G, there are
   number of reasons to compose an end-to-end network slice instance by
   using subnets and stitching operations, thus enabling hierarchical/
   recursive management of slices.  These subnets are the part of the
   network slice instance, but not isolate from network slice.  An
   overlay virtual network may also be constructed of several subnets.
   In such scenario, subnets interconnection to a virtual network is
   required.  We also can consider such interconnection as stitiching.
   With such stitiching, several subnets can provide a end to end
   connection in an overlay virtual network.

   Moreover, with the progress in NVO3 WG, some of the data plane
   encapsulations have been put forward, some are outstanding dataplane
   for an overlay network, such as VxLAN-GPE [I-D.ietf-nvo3-vxlan-gpe],
   GENEVE [I-D.ietf-nvo3-geneve] and GUE [I-D.ietf-nvo3-encap], etc.
   The consideration about these overlay encapsulations has been
   analyzed in [I-D.ietf-nvo3-encap].  The fact is that each of them has
   its custmers, and furthermore, some of them have been already
   deployed in the network.  So that a problem arises: for a virtual