Architecture for Overlay Virtual Sub-Network Interconnection
draft-ao-nvo3-overlay-subnet-architecture-00
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NVO3 WG T. Ao
Internet-Draft ZTE Corporation
Intended status: Standards Track G. Mirsky
Expires: April 21, 2019 ZTE Corp.
Y. Fan
China Telecom
October 18, 2018
Architecture for Overlay Virtual Sub-Network Interconnection
draft-ao-nvo3-overlay-subnet-architecture-00
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
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This Internet-Draft will expire on April 21, 2019.
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Ao, et al. Expires April 21, 2019 [Page 1]
Internet-Draft overlay interconnect October 2018
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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
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