Problem Statement: Overlays for Network Virtualization

Document Type Replaced Internet-Draft (individual)
Last updated 2012-09-11 (latest revision 2012-08-10)
Replaced by draft-ietf-nvo3-overlay-problem-statement
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state Call For Adoption By WG Issued
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-nvo3-overlay-problem-statement
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes issues associated with providing multi- tenancy in large data center networks that require an overlay-based network virtualization approach to addressing them. A key multi- tenancy requirement is traffic isolation, so that a tenant's traffic is not visible to any other tenant. This isolation can be achieved by assigning one or more virtual networks to each tenant such that traffic within a virtual network is isolated from traffic in other virtual networks. The primary functionality required is provisioning virtual networks, associating a virtual machine's virtual network interface(s) with the appropriate virtual network, and maintaining that association as the virtual machine is activated, migrated and/or deactivated. Use of an overlay-based approach enables scalable deployment on large network infrastructures.


Thomas Narten (
Dinesh Dutt (
Luyuan Fang (
Eric Gray (
Lawrence Kreeger (
Maria Napierala (
Murari Sridharan (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)