Network function virtualization: Difference between revisions

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NFV has proven a popular standard even in its infancy. Its immediate applications are numerous, such as virtualization of [[mobile base station]]s, [[platform as a service]] (PaaS), [[content delivery network]]s (CDN), fixed access and home environments.<ref>{{cite web|title=Network Functions Virtualization (NFV) Use Cases|url=http://www.etsi.org/deliver/etsi_gs/NFV/001_099/001/01.01.01_60/gs_NFV001v010101p.pdf}}</ref> The potential benefits of NFV is anticipated to be significant. Virtualization of network functions deployed on general purpose standardized hardware is expected to reduce capital and operational expenditures, and service and product introduction times.<ref name="benefits">{{cite web|title=What's NFV – Network Functions Virtualization?|url=http://www.sdncentral.com/whats-network-functions-virtualization-nfv/|publisher=SDN Central}}</ref><ref>{{cite web|title=Carrier Network Virtualization|url=http://carriernetworkvirtualization.com/company/network-functions-virtualisation-isg-nfv-etsi/|publisher=ETSI news}}</ref> Many major network equipment vendors have announced support for NFV.<ref>{{Cite news |title= Openwave Exec Discusses the Benefits, Challenges of NFV & SDN |work= Article |url= http://www.sdnzone.com/topics/software-defined-network/articles/359936-openwave-exec-discusses-benefits-challenges-nfv-sdn.htm |date= 12 November 2013 |access-date= 22 November 2013 |archive-url= https://web.archive.org/web/20160303214633/http://www.sdnzone.com/topics/software-defined-network/articles/359936-openwave-exec-discusses-benefits-challenges-nfv-sdn.htm |archive-date= 3 March 2016 |url-status= dead }}</ref> This has coincided with NFV announcements from major software suppliers who provide the NFV platforms used by equipment suppliers to build their NFV products.<ref>{{cite web|url=http://www.serviceprovideritreport.com/author.asp?section_id=3098|title=Middleware for the NFV Generation|publisher=Service Provider IT Report|first=Lee|last=Doyle}}</ref><ref>{{cite web|url=http://www.policychargingcontrol.com/1643-wind-river-s-launches-nfv-ecosystem-program-with-initial-five-industry-leaders| title=Wind River Launches NFV Ecosystem Program with Five Industry Leaders|publisher=PCC Mobile Broadband|first1=Ray|last1=Sharma}}</ref>
 
However, to realize the anticipated benefits of virtualization, network equipment vendors are improving IT virtualization technology to incorporate carrier-grade attributes required to achieve [[high availability]], scalability, performance, and effective network management capabilities.<ref>'{{cite web|title=Carrier-Grade Reliability—A “["Must-Have" for NFV Success|url=http://electronicdesign.com/communications/carrier-grade-reliability-must-have-nfv-success Must-Have]” for NFV Success', |publisher=Electronic Design, |first1=Charlie |last1=Ashton, |date=January 2015}}</ref> To minimize the total cost of ownership (TCO), carrier-grade features must be implemented as efficiently as possible. This requires that NFV solutions make efficient use of redundant resources to achieve five-nines availability (99.999%),<ref>{{cite web|title=5 must-have attributes of an NFV platform|url=http://www2.alcatel-lucent.com/techzine/5-must-attributes-nfv-platform/ |archive-url=https://web.archive.org/web/20150526044023/http://www2.alcatel-lucent.com/techzine/5-must-attributes-nfv-platform/ |archive-date=2015-05-26|publisher=Techzine, Alcatel-Lucent|first1=Andreas|last1=Lemke|date=November 2014}}</ref> and of computing resource without compromising performance predictability.
 
The NFV platform is the foundation for achieving efficient carrier-grade NFV solutions.<ref>{{cite web|title=Why Service Providers Need an [NFV Platform | url=https://networkbuilders.intel.com/docs/NP2013113597EN_NFV_Platform_StraWhitePaper.pdf NFV Platform'] {{Webarchive| archive-url=https://web.archive.org/web/20150526045311/https://networkbuilders.intel.com/docs/NP2013113597EN_NFV_Platform_StraWhitePaper.pdf | archive-date=2015-05-26 }}, |publisher=Intel Strategic paper}}</ref> It is a software platform running on standard multi-core hardware and built using open source software that incorporates carrier-grade features. The NFV platform software is responsible for dynamically reassigning VNFs due to failures and changes in traffic load, and therefore plays an important role in achieving high availability. There are numerous initiatives underway to specify, align and promote NFV carrier-grade capabilities such as ETSI NFV Proof of Concept,<ref>[{{cite web|url=http://www.etsi.org/technologies-clusters/technologies/nfv/nfv-poc |title=NFV Proof of Concept]|publisher=ETSI}}</ref> ATIS<ref>'{{cite web|title=New [NFV Forum Focused on Interoperability|url=http://www.lightreading.com/nfv/nfv-strategies/new-nfv-forum-focused-on-interoperability/d/d-id/710874 NFV Forum] Focused on Interoperability', |publisher=Light Reading, |first1=Carol |last1=Wilson,|date=16 September 16, 2015}}</ref> Open Platform for NFV Project,<ref>OPNFV,{{cite web|url=https://www.opnfv.org/|title=OPNFV|publisher=Linux Foundation Collaborative Projects Foundation webpage}}</ref> Carrier Network Virtualization Awards<ref>[{{cite web|url=http://carriernetworkvirtualization.com/carrier-network-virtualization-awards/ |title=Carrier Network Virtualization Awards] {{webarchive|archive-url=https://web.archive.org/web/20150607213250/http://carriernetworkvirtualization.com/carrier-network-virtualization-awards/ |archive-date=2015-06-07|date=December 2015}} 2014, December 2015</ref> and various supplier ecosystems.<ref>{{cite web|title=Wind River's Ecosystemic Solution to NFV and Orchestration|url=https://blog.cimicorp.com/?p=1788|publisher=CIMI Corporation Public Blog|first1=Tom|last1=Nolle|date=June 2014}}</ref>
The NFV platform is the foundation for achieving efficient carrier-grade NFV solutions.<ref>'Why Service Providers
Need an [https://networkbuilders.intel.com/docs/NP2013113597EN_NFV_Platform_StraWhitePaper.pdf NFV Platform'] {{Webarchive|url=https://web.archive.org/web/20150526045311/https://networkbuilders.intel.com/docs/NP2013113597EN_NFV_Platform_StraWhitePaper.pdf |date=2015-05-26 }}, Intel Strategic paper</ref> It is a software platform running on standard multi-core hardware and built using open source software that incorporates carrier-grade features. The NFV platform software is responsible for dynamically reassigning VNFs due to failures and changes in traffic load, and therefore plays an important role in achieving high availability. There are numerous initiatives underway to specify, align and promote NFV carrier-grade capabilities such as ETSI NFV Proof of Concept,<ref>[http://www.etsi.org/technologies-clusters/technologies/nfv/nfv-poc NFV Proof of Concept]</ref> ATIS<ref>'New [http://www.lightreading.com/nfv/nfv-strategies/new-nfv-forum-focused-on-interoperability/d/d-id/710874 NFV Forum] Focused on Interoperability', Light Reading, Carol Wilson, September 16, 2015</ref> Open Platform for NFV Project,<ref>OPNFV, Linux Foundation Collaborative Projects Foundation webpage</ref> Carrier Network Virtualization Awards<ref>[http://carriernetworkvirtualization.com/carrier-network-virtualization-awards/ Carrier Network Virtualization Awards] {{webarchive|url=https://web.archive.org/web/20150607213250/http://carriernetworkvirtualization.com/carrier-network-virtualization-awards/ |date=2015-06-07 }} 2014, December 2015</ref> and various supplier ecosystems.<ref>{{cite web|title=Wind River's Ecosystemic Solution to NFV and Orchestration|url=https://blog.cimicorp.com/?p=1788|publisher=CIMI Corporation Public Blog|first1=Tom|last1=Nolle|date=June 2014}}</ref>
 
The vSwitch, a key component of NFV platforms, is responsible for providing connectivity both VM-to-VM (between VMs) and between VMs and the outside network. Its performance determines both the bandwidth of the VNFs and the cost-efficiency of NFV solutions. The standard [[Open vSwitch]]'s (OVS) performance has shortcomings that must be resolved to meet the needs of NFVI solutions.<ref>{{cite web|url=http://networkheresy.com/2014/11/13/accelerating-open-vswitch-to-ludicrous-speed/|title=Accelerating Open vSwitch to "Ludicruos Speed"|work=Network Heresy: Tales of the network reformation|first1=Justin|last1=Pettit|date=11 November 2014}}</ref> Significant performance improvements are being reported by NFV suppliers for both OVS and Accelerated Open vSwitch (AVS) versions.<ref>{{cite web|title=Wind River Delivers Breakthrough Performance for Accelerated vSwitch Optimized for NFV|url=http://www.windriver.com/news/press/pr.html?ID=12801|publisher=Wind River News Room|date=May 2014}}</ref><ref>{{cite web|title=6WIND Announces Open vSwitch Acceleration for Red Hat Enterprise Linux OpenStack Platform|url=http://www.prweb.com/releases/2014/04/prweb11768622.htm|publisher=PRweb|date=April 2014}}</ref>