Founded in November 2012 by seven of the world's leading telecoms network operators ISG NFV became the home of the Industry Specification Group for NFV.
Five years and over 100 publications later, the ISG NFV community has evolved through several phases, its publications have moved from pre-standardization studies to detailed specifications (see Release 2 and Release 3) and the early Proof of Concepts (PoCs) efforts have evolved and led to interoperability events (Plugtests). This large community (300+ companies including 38 of the world's major service providers) is still working intensely to develop the required standards for NFV as well as sharing their experiences of NFV implementation and testing.
ISG NFV, like any other ETSI Industry Specification Group is open to ETSI members and non-members alike, with different conditions depending on ETSI membership status. If you would like to participate in this work, please contact the NFV support team.
Modern telecoms networks contain an ever increasing variety of proprietary hardware. The launch of new services often demands network reconfiguration and on-site installation of new equipment which in turn requires additional floor space, power, and trained maintenance staff.
The innovation cycles accelerate and require greater flexibility and dynamism than hardware-based appliances allow. Hard-wired network with single functions boxes are tedious to maintain, slow to evolve, and prevent service providers from offering dynamic services.
In the same way that applications are supported by dynamically configurable and fully automated cloud environments, virtualized network functions allow networks to be agile and capable to respond automatically to the needs of the traffic and services running over it.
Key enabling technologies for this vision include SDN (Software Defined Networking) and NFV (Network Functions Virtualisation). SDN and NFV are complementary but increasingly co-dependent in order for the benefits of software-defined networking to be fully realized.
ETSI NFV ISG undertakes work in 2-year phases.
Documents published during the first phase (2013-2014) were considered as pre-normative studies, and are sometimes erroneously referred to as 'Release 1’.
After the first 2-year 'Phase', the ISG NFV community, which reached an attendance peak in 2014, decided to develop normative specifications with more formalism. They started to plan the content for their future releases. Subsequent tranches were referenced as 'Release 2', 'Release 3' etc. Release 2 development ended Q3 2016 when Release 3 started.
Going forward, the ISG will continue to develop specifications that meet the needs of the industry, and maintain its published documents. Progress in the industry will be monitored, including feedback from implementation, and the identification of gaps will be addressed.
NFV Release 3 is under way: the "feature collection" initiative led to an initial set of 18 New Work Items (future publications) being approved as part of this third release, although other documents could be created and added during the development.
A "Release 3 Definition" identifies the work items that will be addressed by the ISG in the coming months.
As part of Release 3 and other release-independent work items the ISG NFV is currently engaged in:
The need to produce normative specifications to enable end-to-end interworking of equipment and services formed a fundamental part of this phase.
The ISG decided to group most of its normative work into 'NFV Release 2' which is a subset of the published documents during the 2015-2016 phase. It was defined by selecting and prioritizing a set of key capabilities for NFV and specifying them up to the level of requirements, interfaces, and information models.
As part of Release 2, the ISG NFV specified functional requirements applicable to the VIM, VNFM and NFVO functional blocks, and requirements applicable to the reference points. In addition, requirements, interfaces and information models related to different capabilities were specified, including:
In the first 2-years of NFV ISG, the initial focus was:
The original vision outlined in the joint-operator white paper published in October 2012 was:
The first important milestone was the publication of the first five ETSI Group Specifications (GSs) documents in October 2013. Four of them were designed to align understanding about NFV across the industry. They covered NFV use cases (NFV 001), virtualization requirements (NFV 004), an architectural framework (NFV 002), and terminology (NFV 003). The fifth one defined a framework for co-ordinating and promoting public demonstrations of Proof of Concept (PoC) platforms illustrating key aspects of NFV (NFV-PER 002).
In 2014, the publication pace accelerated with the release of 11 other documents:
This first set of documents closed the first 2-year phase of ISG NFV. At the time they were written the ETSI NFV community was considering these documents as “pre-standardization” work. They helped the industry to build a culture and share a common understanding on the important concepts to master when working in network virtualization.
Although these document were not developed with the formalism of standard specifications, they are very valuable and constitute a large documentation basis for the reader.
With over 100 NFV publications and over 50 draft specifications in progress it can be tricky to find a document. In order to assist you please find the following guidelines:
Search for all ISG NFV publications.
Search for specifications within the NFV Architecture Framework:
Find published NFV specifications using the Standards Search function, and subscribe for alerts on updates of specifications.
Search for Drafts in progress via the ETSI Work Programme.
The direct link to refer to this blog is http://www.etsi.org/blog-subscription-information/categories/blog-nfv
As I flew to Sophia Antipolis for the twenty second plenary session of the ETSI NFV Industry Specification Group (ISG), I reflected how far we had come since publication of the now famous white paper introducing the NFV concept.
Until that moment in October 2012, the term “Network Function Virtualisation” did not exist, it had emerged from a meeting of the founding group in Paris in the summer of 2012 to distinguish the topic from SDN which by then was gaining momentum. We were all experienced telecommunications R&D leaders who knew that our goals were ambitious and would be highly disruptive to the industry, so we would need to be extraordinarily diligent to bring all the industry players on board, large and small, and with everyone able to be heard and to contribute their energies and expertise.
We chose ETSI to host the effort for many different reasons, but perhaps the most important ones were transparency of governance proven by many years of global standards development, and open membership for small players, especially independent software vendors whom we felt would be important contributors. We have never regretted the decision to come to ETSI who have provided fantastic support, and the rigorously consensus-driven decision-making process has kept us grounded.
All of that seemed so long ago and I couldn’t have imagined that along the way I would move to the United States and start a new career in the cable industry while retaining my role as chair of the ETSI NFV Network Operator Council. After a 40+ year R&D career in BT, it was a seamless transition that was as unlikely as it was life changing for me.
Looking back over the past six years, there have been moments of great pride, such as when agreement was reached in a late-night session on the ETSI NFV Architectural Framework, interspersed with moments of doubt as strident voices from the world of software repeatedly criticized our efforts.
As with all things, time is a great leveler, five years on the NFV Architectural Framework has withstood the test of time and is being deployed at scale, and open source groups have begun to realize that the telecommunications networks environment is very different to the enterprise IT environment. Telecommunications networks are critical national infrastructures that underpin global commerce and security and as such demand analytical rigor and auditability that only implementations based on high quality specifications endorsed by the key stakeholders can provide.
Even as we took a page from the open source book and opened our draft specifications for external scrutiny and feedback and continually sought ways to speed up our work. And we founded OPNFV to enable open source groups to collaborate and provide feedback to ETSI NFV.
The NFV community met for the 21st time (NFV#21) from February 26 to March 2, in a familiar setting:
The flawless organization, the friendly faces greeting us, the countless wonderful coffee machines, everything was normal. What was less familiar: it snowed. On the Cote d’Azur. Twice(!). For a total of approximately 15cm. This is very rare in this region. Apparently, the last time it snowed was during NFV#1, back in January 2013. While we are solving the challenges for NFV, the weather is telling us we can easily deal with another one!
Despite the predictable flight delays resulting from the frigid European weather, the event was well attended by over 80 members of the core team. And it was a busy, productive week.
Work on Release 3 is well under way. There are currently 17 new features being actively developed, along with 15 active work items related to Release 3. In addition, multiple Release 2 deliverables (13 as of now) are being currently propagated to Release 3 (with their corresponding work items). At NFV#21, a third maintenance cycle for Release 2 work items was also approved, so the maintenance work will continue for the first half of 2018. That’s a lot of balls up in the air at the same time, and it’s a remarkable achievement that this highly focused group can pull this off.
The results of the 2nd ETSI NFV Plugtests were center stage at this meeting: the findings were presented to the plenary and discussed within the TST working group who will incorporate the feedback into their documents going forward. Clearly the industry is progressing with more energy compared with just one year ago. The Plugtests results will be summarized in a separate blog post and presented at upcoming conferences.
Two new working group leaders were elected since the last plenary meeting: Julien Maisonneuve (Nokia) and Ulrich Kleber (Huawei). Julien brings extensive leadership experience, while Uli brings new perspectives including valuable open source experience. These roles require a lot of personal commitment and long hours across multiple time zones. We are very grateful to both of them.
With the publication of ETSI GS NFV-SOL005, the specification of the RESTful APIs exposed by an NFV Orchestrator (NFVO) towards operations support systems (OSS), the ETSI NFV Industry Specification Group (ISG) has successfully met its objective to deliver a full set of API specifications enabling an open ecosystem where Virtualized Network Functions (VNFs) will be interoperable with independently developed management and orchestration systems, and where the components of a management and orchestration system are themselves interoperable.
Encouraging interoperability within an open ecosystem was a key objective for ETSI NFV when it was launched in late 2012 by global carriers.
These API specifications are the result of a wide industry consensus. Compliance to them permits a wide range of multi-vendors deployment scenarios. For example, a VNF can be managed by a generic VNF Manager (VNFM) function (stand-alone or combined with an NFVO), an NFVO can consume the services of a VNF-specific VNFM, and the services exposed by an NFVO can be consumed by higher-level service orchestration functions.
Furthermore, the ISG has completed revisions of two previously published API specifications which detail the REST APIs between an NFV Orchestrator (NFVO) and a VNF Manager (VNFM), and between a VNFM and a VNF or its Element Manager, respectively ETSI GS NFV-SOL 003 and ETSI GS NFV-SOL 002, completed in July 2017. Revised versions have been approved in December 2017, the main change being the support of a TLS-based option for controlling API access authorization (as an alternative to the use of OAuth 2.0).
The ETSI Industry Specification Group on NFV is developing a set of specifications and reports with the goal to enable an open NFV market, where Virtualised Network Functions (VNFs) are interoperable and packaged in a way that is independent of the vendor supplying them or the service provider consuming them, are interoperable with independently developed management systems, and are operable in a manner that is independent from the underlying hardware.
Since its creation the ISG has produced over 60 specifications and reports. It is of paramount importance to the ISG to make sure that the specifications it produces meets the expectations of the industry.
The ISG has created a survey to help understand which of these specifications are the most useful to the industry. Should you wish to participate to this survey, please follow this link: https://www.surveymonkey.com/r/NFV_Industry_Adoption
The ETSI NFV Industry Specification Group (ISG) met on 4-8 December 2017 for its twentieth plenary meeting (NFV#20) at ETSI Headquarters in Sophia-Antipolis, France. This time, the breezy and sunny Provence & Cote d’Azur in the spring changed to a rather chilly and icy setting, but nothing that our brave ETSI NFV ISG delegates could not handle perfectly with heated discussions and some extra coffee (or tea).
As reported in previous posts, the NFV ISG has been planning and progressing the set of Release 3 feature reports. The latest interim NFV Announcement report provides an overview of the progress made by the different NFV ISG working groups until and up to NFV#19. At the NFV#20 meeting, a significant step forward was achieved with approval to create the related normative work items. But this meeting wasn’t all about Release 3, as the working groups were also very busy completing the second round of Release 2 maintenance work.
Describing all the great work performed by the working groups and NFV ISG delegates worldwide is not an easy task. The meeting venue was again the perfect setting for many intense interactions and discussions. As Technical Manager, my sincere appreciation and thanks go out to all the delegates for the work achieved as well as the excellent collaboration between the working groups.
Among the many highlights at NFV#20, there was one shadow; NFV#20 was the meeting in which, unfortunately, we said goodbye to Yun Chao Hu (EVE WG Chairman, Huawei), a long-standing NFV contributor from the inception of NFV. Yun Chao has worked exceptionally hard to help our work. An award for Yun Chao’s outstanding work and support to the NFV ISG was delivered by our ISG Chairman, Diego Lopez (Telefonica). We wish to Yun Chao “all the best in your future professional tasks, and hope to see you again in other places”.
Last week in Denver, CableLabs hosted over 130 delegates from all over the world to the 19th plenary session of the ETSI NFV Industry Specification Group, the cradle and main playground for the Network Function Virtualization technologies that are bringing radical transformation to the telecommunications industry. With over 300 member companies including 38 global network operators, ETSI NFV is the leading forum developing the foundation international standards for NFV.
This blogpost provides a snapshot report on the progress of ETSI NFV standardization.
The ETSI NFV Industry Specification Group (ISG) has completed an essential step towards enabling an open ecosystem where Virtualised Network Functions (VNFs) will be interoperable with independently developed management and orchestration systems, and where the components of a management and orchestration system are themselves interoperable.
The ETSI NFV Industry Specification Group (ISG) met for its eighteenth plenary meeting (NFV#18) at ETSI Headquarters in Sophia-Antipolis, France. Springtime on the breezy and sunny Cote d’Azur was the ideal setting to replenish the batteries of the hard working ETSI NFV ISG delegates during a very busy week!
I'm the Vice-Chair of the Testing, Implementation and Open Source (TST) Working Group at the ETSI NFV ISG.
In the test industry for the past 20 years, I have been working at Ixia for the past 11 years, always in the product management team for wireless test products. Most of my experience has been with mobility testing: GSM, UMTS, LTE, etc.
ETSI, through its Center for Testing and Interoperability (CTI) recently held its first ever NFV PlugtestsTM event in January. In addition to the wise decision to hold it in Leganes, Spain, just outside of beautiful and sunny Madrid, I would qualify the event a technical success. I explain why below.
Interviewed at MWC, Diego Lopez Senior Technology Expert at Telefonica, and Chairman of ETSI NFV ISG, discusses the results of the first NFV Plugtests in Madrid, the publication of Release 2 specifications and the Release 3 work.
Bilbao-Spain February 21-24, 2017
The ETSI NFV Industry Specification Group met for its seventeenth plenary meeting (NFV#17) in the beautiful city of Bilbao in northern Spain hosted by the University of the Basque Country, Faculty of Engineering. In many ways this was a milestone meeting, a new leadership team was elected, key NFV specifications were approved for publication, a joint session with the Open Source MANO (OSM) community was held, and the latest joint-operator NFV white paper outlining the priorities for 5G was timed for publication during this meeting.
Guggenheim Museum in Bilbao
Today, twenty-three network operators published a white paper to guide the industry on priorities for NFV to deliver the industry vision for 5G systems: “Network Operator Perspectives on NFV priorities for 5G”. The network operator co-authors include Bell Canada, BT, CableLabs, CenturyLink, China Mobile, China Unicom, Colt, Deutsche Telekom, KDDI, KT, NTT, NTT DOCOMO, Orange, Portugal Telecom, Rogers, SK Telecom, Sprint, STC, Swisscom, Telecom Italia, Telefonica, Telenor, and Vodafone. As managing editor for this white paper, I worked closely with colleagues from these leading organisations to document some key consensus requirements that we want the 5G standards community to take into account in their upcoming specification work.
Authors: Diego Lopez, NFV ISG Chairman, Joan Triay NFV TSC Chair & Peter Wörndle NFV TSC Vice Chair
The ETSI NFV ISG has just concluded their last plenary meeting for 2016 (that was precisely NFV#16) with the attendance of 175 delegates from 60 organizations. NFV#16 was hosted from December 12th to 15th by Huawei in Shenzhen, China.
The meeting kicked off with a Huawei NFV workshop, specifically focused on the evolution of NFV, with the horizon that has become common when talking about the next generation of networking: the year 2020.
The ETSI NFV ISG (Industry Specification Group) has a new chairman in Diego Lopez, Head of Technology Exploration & Standards at Telefónica, and a new lease on life. ISGs are supposed to kick-start technology areas, not permanently rule them, but NFV ISG has been granted a two year extension, in part to mesh NFV capabilities with 5G requirements.
Diego Lopez, Telefónica, explains why it is important to incorporate 5G into NFV ISG's analysis for the coming NFV release, since NFV is now recognised as an essential enabling technology for 5G.
The work program of ETSI NFV ISG for 2015 was very ambitious, with a majority of activities committed to conclude during this first year of the ISG two-year renewed term, and intended to produce the set of normative documents that were generally referred as ETSI NFV Release 2.
Many of these activities are completed or just awaiting the completion of the last procedural steps to be officially published. This announcement provides a brief report on these accomplishments, structured around an introduction to the completed (informative) reports and a preview of the Release 2 description, which we expect to publish by May 2016.
NFV#13 took place on 16-19 February in Dublin, Ireland at the impressive Croke Park stadium, the fourth largest stadium in Europe.
Thanks to the hosts Cobham Wireless and the sponsors OPENET, ETSI NFV ISG members were treated to a pre-event workshop on Monday 15 February that covered the state of the art of NFV initiatives, with presentations from Intel, Telefonica, Luxoft, Stratus Technologies and EANTC.
The week that followed was certainly intense for the 210 delegates – although the work was somewhat balanced by a very pleasant social event in the Croke Park Player’s Lounge.
The 12th meeting of the ETSI Network Functions Virtualisation Industry Specification Group (ETSI NFV ISG) was held in Jersey City, NJ (USA), just across the Hudson River from New York City. Surrounded by the stunning Manhattan skyline, the locale offered an excellent venue for the Industry Group driving the NFV ecosystem.
Manhattan Skyline, from Jersey City, NJ, location for NFV #12
During their 11th Plenary in San Jose, California, ETSI ISG NFV Officials and Working Group chairmen provided an overview of the group's achievements to date (Phase 1: 2013-2014) together with a snapshot of the ongoing Phase 2 work due for completion early 2016.
This was done in the form of a set of 6 short tutorials, each presented by a Working Group Official. Telecom TV was present and filmed these tutorials which are now available as a good overview for NFV newcomers.
See the 6 videos here...
ETSI NFV Announcement on Document Availability
During the first six months of its second phase, the ETSI NFV ISG has been actively working on the development of normative specifications for the reference points identified by the NFV Architecture Framework, addressing the interoperability goals that constitute its key objective, and on continuing the exploration of NFV technical aspects in the essential areas identified during the inception of this second phase. This has been performed in a framework of continuous and tight collaboration with those external bodies (SDOs and open-source projects) most directly concerned with NFV technologies.
One important milestone in this development, aimed to facilitate open collaboration with external bodies and the industry and academia at large, has been the decision to make all NFV draft documents publicly available (see NFV ISG Open area).
ETSI NFV returns to Silicon Valley, in conjunction with the NFV/SDN community
Summertime is typically a time for holidays, family, and a break from the hectic pace of our professional lives. But not in Silicon Valley, where the 11th meeting was held for the ETSI Network Functions Virtualisation Industry Specification Group (NFV ISG). In fact, with the OpenDaylight Summit, MEF Quarterly meeting also being held in the same week, it remains as busy as ever.
NFV is happening and it’s big !!
Some metrics were shared during NFV#10. And the result is amazing!
First China Meeting, Open Source Approach on Document Transparency and Availability
Hainan Island, the southern-most tip of China, was the tropical setting of the 10th meeting (NFV #10) of the ETSI Network Functions Virtualisation Industry Specification Group (NFV ISG) held in mid-May. The ~200 participants descending upon Sanya found it to be a spacious and hospitable venue to collaborate and experience the best of what China has to offer.
Figure 1 – Beautiful Sanya, site of NFV #10 hosted by Huawei
Source: Klaus Martiny, DT (Vice-Chair, NFV Network Operators Council)
Last week three events took place at the NOKIA headquarters in Helsinki: the NFV ISG leadership team met for a day to discuss progress and future direction for the ISG, the IFA Working Group held a 1-day joint session with 3GPP SA 5 to align their activities and this was followed by an IFA Working Group interim meeting.
You might need to refresh the page to be able to view the video.
Prague in February was the setting of the 9th meeting of the ETSI Network Functions Virtualisation Industry Specification Group (NFV ISG). Perhaps it was the delicious beer (Czechs consume more beer per capita than any other nation in the world), rich heritage (over 1,100 years) or prominence (largest city and capital of the Czech Republic, and one of the most visited cities in all of Europe). The 270 participants descending upon Prague found it to be inviting, and an ideal venue to collaborate.
New leadership, organization, and renewed focus on implementation
While much of the country was coping with sub-freezing temperatures, the ETSI Network Functions Virtualization Industry Specification Group (NFV ISG) convened its 8th and final meeting under its original charter in the desert sunshine in Scottsdale. Intel graciously hosted the meeting, arranging excellent accommodations and hospitality throughout the week.
Video from 1st ETSI NFV PoC ZONE, October 2014 in Düsseldorf
The first ETSI NFV PoC ZONE was run from 15th to 17th of October during the SDN & Open Flow World Congress in Düsseldorf, Germany.
Around 100 delegates made the trip to Sophia Antipolis in late September.
The ISG made good progress toward closing the few remaining open issues in the current release of documents. Of the 167 open issues originally identified, 136 are now closed (about 81%).
With a few weeks remaining to NFV#8 in Arizona, we should be in good shape to close the remaining issues by the opening of the meeting. While closing open issues remains our number one priority, issues that cannot be resolved can be captured in the ISG gap analysis document for resolution in ongoing work.
Next month marks the two year anniversary of Network Functions Virtualization (NFV), which has taken the industry by storm and transformed the relationship between major operators and network standards.
As we plan to return to Germany next month for the SDN and OpenFlow World Congress, the event where the landmark NFV White Paper was published in October, 2012 and the ETSI NFV initiative was announced, many in the NFV community are reexamining a fundamental goal that has guided NFV from the beginning - Openness.
Openness means many things to different communities, as Matt Palmer summarized in his series: Defining Openness for Open SDN and NFV: A Primer for Network Operators.
Enjoy watching the interviews by key players filmed at NFV#7
New leadership, renewed charter, and an enhanced structure to facilitate the transition from requirements to implementation
Santa Clara, CA, USA
Wandering through the Computer History Museum in Mountain View (at the social gathering of the ETSI Network Functions Virtualisation Industry Specification Group - ETSI NFV ISG), was like a trip down memory lane.
International Business Machines (IBM) mainframes (e.g., 360/370, which I spent many a night working on at the University of Missouri in the 1970s), Digital Equipment Corporation (DEC) minicomputers (I was a systems manager for the PDP-11 and VAX-11/780 at McDonnell Douglas in the 1980s), and a slew of computers, calculators, and gadgets whose manufacturers have faded from memory.
A new article about how NFV changes the business of telecoms, written by Luis Jorge Romero, Director General of ETSI, has been published on Global Telecom Business, read the full article.
Expect constructive change as NFV continues to evolve
Settling into the meeting rooms at the sixth gathering of the ETSI Network Functions Virtualisation Industry Specification Group (ETSI NFV ISG), we were impressed by the photographs bearing actual signatures of the leaders of the G8 who attended the Kyushu-Okinawa Summit back in July, 2000.
At that meeting, the G8 issued the Okinawa Charter on Global Information Society, which carries the objective of delivering “greater prosperity and deeper peace of mind, and greater stability”.
While NFV may not wield such widespread influence, the 260+ participants at the meeting are intent on transforming the entire telecommunications industry, and could change the world like other telecommunications revolutions through the decades.
The TSC#23 meeting of the NFV ISG endorsed the proposed 2014 NFV research agenda aimed at providing guidance to the global research community on topics of relevance to the NFV industry.
Academic researchers and workshop organizers are encouraged to consider these topics as a source of inspiration for their research efforts. It is hoped that the results of research inspired by these topics will be useful in understanding the fundamental constraints of technology available, and assisting industry to evaluate alternative approaches.
Topics include (but are not limited to):
The links for the following webinars are available here
Video – live on 17th October 2013 - Diego López, Technical Manager, ETSI ISG NFV, Head of Technology Exploration, Telefónica I+D
Enjoy the video of the NFV social event in Malaga – celebrating the achievements of year 1 and looking at the hopes and plans for year 2
Over the past few weeks two major events took place in the space of Software Defined Networking: the first was the Open Daylight Summit (ODS) and most recently the fourth installment of the Open Networking Summit (ONS). Both events were held in the Heart of Silicon Valley in the Santa Clara Convention Center.
ETSI NFV ISG leadership weighs in on the state of NFV
The fifth meeting of the ETSI Network Functions Virtualization Industry Specification Group (ETSI NFV ISG) marked the one year anniversary of NFV, and a significant turning point for the organization.
ETSI members and delegates descended upon one of the oldest, and southernmost large cities in Europe- Malaga, Spain for NFV#5, as the NFV ISG took another step towards implementation. Interest in NFV remains sky high; meeting participation was capped at 250, and over-subscribed, for the capacity of the venue.
Way back in January, 2013, a group of NFV visionaries of 60 organizations, held the first meeting of the ISG at ETSI HQ on the Cote d’Azur. Since that time, the ISG has made considerable progress:
Don Clarke, chairman of the NFV ISG Network Operator Council (NOC) was recently interviewed by The Register in an article providing an overview of the NFV concept.
Special report - ETSI shaves years off NFV development time.
Watch the video:
The fourth ETSI ISG NFV plenary meeting was held on the 30th October to 1st November 2013, in Sunnyvale, USA, and was kindly hosted by Juniper and co-sponsored by IBM.
A new ISG NFV record was set, seeing 350 delegates participating to the busy NFV plenary sessions. Indeed such is the popularity of the NFV meetings especially when held in Silicon Valley, that registration had to be capped. Growth of membership is still high, and 14 additional companies joined ISG NFV in the weeks preceding the NFV#04 meeting, taking total membership to 170 individual companies.