Network Virtualization Research Challenges
RFC 8568

Document Type RFC - Informational (April 2019; No errata)
Last updated 2019-06-24
Replaces draft-bernardos-nfvrg-gaps-network-virtualization
Stream IRTF
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IETF conflict review conflict-review-irtf-nfvrg-gaps-network-virtualization
Stream IRTF state Published RFC
Consensus Boilerplate Yes
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IESG IESG state RFC 8568 (Informational)
Telechat date
Responsible AD Deborah Brungard
Send notices to (None)
IANA IANA review state IANA OK - No Actions Needed
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Internet Research Task Force (IRTF)                        CJ. Bernardos
Request for Comments: 8568                                          UC3M
Category: Informational                                        A. Rahman
ISSN: 2070-1721                                             InterDigital
                                                              JC. Zuniga
                                                                  SIGFOX
                                                           LM. Contreras
                                                                     TID
                                                               P. Aranda
                                                                    UC3M
                                                                P. Lynch
                                                   Keysight Technologies
                                                              April 2019

               Network Virtualization Research Challenges

Abstract

   This document describes open research challenges for network
   virtualization.  Network virtualization is following a similar path
   as previously taken by cloud computing.  Specifically, cloud
   computing popularized migration of computing functions (e.g.,
   applications) and storage from local, dedicated, physical resources
   to remote virtual functions accessible through the Internet.  In a
   similar manner, network virtualization is encouraging migration of
   networking functions from dedicated physical hardware nodes to a
   virtualized pool of resources.  However, network virtualization can
   be considered to be a more complex problem than cloud computing as it
   not only involves virtualization of computing and storage functions
   but also involves abstraction of the network itself.  This document
   describes current research and engineering challenges in network
   virtualization including the guarantee of quality of service,
   performance improvement, support for multiple domains, network
   slicing, service composition, device virtualization, privacy and
   security, separation of control concerns, network function placement,
   and testing.  In addition, some proposals are made for new activities
   in the IETF and IRTF that could address some of these challenges.
   This document is a product of the Network Function Virtualization
   Research Group (NFVRG).

Bernardos, et al.             Informational                     [Page 1]
RFC 8568       Network Virtualization Research Challenges     April 2019

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Research Task Force
   (IRTF).  The IRTF publishes the results of Internet-related research
   and development activities.  These results might not be suitable for
   deployment.  This RFC represents the consensus of the Network
   Function Virtualization Research Group of the Internet Research Task
   Force (IRTF).  Documents approved for publication by the IRSG are not
   candidates for any level of Internet Standard; see Section 2 of RFC
   7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8568.

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
   carefully, as they describe your rights and restrictions with respect
   to this document.

Bernardos, et al.             Informational                     [Page 2]
RFC 8568       Network Virtualization Research Challenges     April 2019

Table of Contents

   1.  Introduction and Scope  . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Network Function Virtualization . . . . . . . . . . . . .   6
     3.2.  Software-Defined Networking . . . . . . . . . . . . . . .   9
     3.3.  ITU-T Functional Architecture of SDN  . . . . . . . . . .  13
     3.4.  Multi-Access Edge Computing . . . . . . . . . . . . . . .  15
     3.5.  IEEE 802.1CF (OmniRAN)  . . . . . . . . . . . . . . . . .  15
     3.6.  Distributed Management Task Force (DMTF)  . . . . . . . .  15
     3.7.  Open-Source Initiatives . . . . . . . . . . . . . . . . .  16
   4.  Network Virtualization Challenges . . . . . . . . . . . . . .  18
     4.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .  18
     4.2.  Guaranteeing Quality of Service . . . . . . . . . . . . .  18
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