Web Analytics
Welcome New MEF Members
Inquiries: +1 310-642 2800
The Industry Common Language for SD-WAN Services
MEF’s SD-WAN service definition standard describes requirements for an application-aware, over-the-top WAN connectivity service that uses policies to determine how application flows are directed over multiple underlay networks irrespective of the underlay technologies or service providers who deliver them.
Direct support from thirty service providers & technology suppliers
SD-WAN Service Constructs
MEF SD-WAN Service Constructs May 2019-2
Physical or virtual
SD-WAN Controller
Centralized management of SD-WAN edges & gateways
Service Orchestrator
Lifecycle Service Orchestration of SD-WAN and other services
Subscriber Web Portal
Subscriber service ordering and modification

SD-WAN Standard Service Results
  • Reducing market confusion
  • Focusing industry on core set of capabilities
  • Enabling SD-WAN service automation
  • Supporting future SD-WAN services certification
Download PDF

The SD-WAN market is one of the hottest in the communications industry, with tens of billions of dollars in revenue at stake throughout the next 5 years. IDC estimates that the global SD-WAN infrastructure market (excluding managed services) will reach $US 5.3 billion by 2023 due to strong enterprise demand and the embrace of SD-WAN by leading service providers seeking to provide enterprises with dynamic management of hybrid WAN connections with guaranteed QoS on a per-application basis. The US managed SD-WAN services market alone is projected to reach $US 4.5 billion by 2023, according to Vertical Systems Group.

Today’s SD-WAN market shares similarities to the early days of today’s $US 80+billion Carrier Ethernet market before standardization and services, technology, and professional certification took hold. There is lot of excitement about performance/price advantages, greater flexibility, etc., but there is also a huge need for education and alignment on terminology to help increase market efficiencies.


MEF is the world’s leading communications industry organization shaping the direction and growth of the SD-WAN services market through standardization and emerging certification of services, technologies, and professionals.

In July 2019, MEF published the industry’s first global standard defining an SD-WAN service and its service attributes to help accelerate SD-WAN market growth and facilitate creation of powerful new hybrid networking solutions that are optimized for digital transformation.

SD-WAN service standardization has been conducted within the context of the MEF 3.0 Global Services Framework. It is part of a transformational initiative to define, deliver, and certify a family of dynamic Carrier Ethernet (CE), Optical Transport, IP, SD-WAN, and security services orchestrated across automated networks using LSO (Lifecycle Service Orchestration) APIs.

Combining standardized SD-WAN services with dynamic high-speed underlay connectivity services will enable service providers to offer MEF 3.0 hybrid networking solutions with unprecedented user- and application-directed control over network resources and service capabilities.


MEF’s SD-WAN Service Attributes and Services (MEF 70) standard describes requirements for an application-aware, over-the-top WAN connectivity service that uses policies to determine how application flows are directed over multiple underlay networks irrespective of the underlay technologies or service providers who deliver them.

MEF 70, among other things, defines:

  • Service attributes that describe the externally visible behavior of an SD-WAN service as experienced by the subscriber.
  • Rules associated with how traffic is handled.
  • Key technical concepts and definitions like an SD-WAN UNI, the SD-WAN Edge, SD-WAN Tunnel Virtual Connections, SD-WAN Virtual Connection End Points, and Underlay Connectivity Services.

SD-WAN standardization offers numerous benefits that will help accelerate SD-WAN market growth while improving overall customer experience with hybrid networking solutions. Key benefits include:

  • Enabling a wide range of ecosystem stakeholders to use the same terminology when buying, selling, assessing, deploying, and delivering SD-WAN services.
  • Making it easier to interface policy with intelligent underlay connectivity services to provide a better end-to-end application experience with guaranteed service resiliency.
  • Facilitating inclusion of SD-WAN services in standardized LSO architectures, thereby advancing efforts to orchestrate MEF 3.0 SD-WAN services across automated networks.
  • Paving the way for creation and implementation of certified MEF 3.0 SD-WAN services, which will give users confidence that a service meets a fundamental set of requirements.

MEF 70 – Components of SD-WAN Service
MEF 70 – Components of SD-WAN Service


MEF already has begun work on the next phase of SD-WAN standardization – MEF 70.1 – that will be of high interest to many enterprises. This work includes defining:

  • Service attributes for application flow performance and business importance.
  • SD-WAN service topology and connectivity.
  • Underlay connectivity service parameters.

MEF also is progressing related standards work focused on:

  • Application security for SD-WAN services.
  • Intent-based networking for SD-WAN that will simplify the subscriber-to-service provider interface.
  • Information and data modeling standards that will accelerate LSO API development for SD-WAN services.

SD-WAN benefits end customers by enhancing their applications network traffic. The appetite to combine application protection with network efficiency is high. Hence, MEF is focused on defining the first standard description of a security service. Security done wrong actually could negate SD-WAN benefits in speed and availability.

MEF’s Application Security for SD-WAN project is focused on defining policy criteria and actions to protect applications (application flows) over an SD-WAN service. Work includes defining threats, security functions, and security policy terminology and attributes, and then describing what actions a security policy should take in response to certain threats.

The threats being addressed can come from within the SD-WAN subscriber’s network or externally from the Internet when connecting to public clouds and other Internet hosts. One key area the project is currently addressing is defining Zones whereby the enterprise subscriber defines a grouping of subnets, using business function naming, where unique security policies are applied. Examples of Zones include a Point-of-Sales (POS) Terminal Zone where POS terminals are segregated from the rest of the network to protect payment card transactions connecting to a data center from being scanned and information stolen. Another Zone could be a Guest Wi-Fi Zone where visitors are allowed access to the Internet but are segregated from the corporate network. For each Zone, security policies would be applied for various defense postures.


MEF’s IBN work aims to enable an SD-WAN service subscriber to set intent-related performance and security objectives and have that be translated into granular technical policies at the network level. Toward this goal, MEF is building Domain Specific Languages (DSLs) – using restricted natural languages – that will simplify APIs that sit between end-users and service providers.


Within a broader MEF Services Model (MSM) project related to orchestration of MEF 3.0 services, MEF is modeling the SD-WAN specifications to be used for LSO APIs across many reference points within the LSO framework. The initial focus of the SD-WAN work centers on LSO Legato, which supports interactions between business applications and service orchestration functionality. The SD-WAN work also has applicability for the LSO Cantata and LSO Allegro interfaces associated with product- and service-related management interactions between a customer and a service provider.


Different service and technology providers will have their own pace, but companies generally will want to align to MEF 70 and follow-on standards because of the confidence that this helps instill in customers.

We already have dozens of service provider and technology companies who have voiced support for MEF work and contributed to standards development. This includes players like AT&T, Comcast Business, CenturyLink, Colt, Orange Business Services, Verizon, Fujitsu Network Communications, Nuage Networks, Cisco, Spirent, Amdocs, Silver Peak, and other MEF member companies.

MEF’s SD-WAN standardization work also is starting to draw the attention of some big purchasers of WAN services. As an example, technical leaders at one of the largest buyers of connectivity in the world informed MEF that they are looking at aligning on MEF SD-WAN terminology, similar to what they have done with MEF-defined Carrier Ethernet.

Another important part of the story will be SD-WAN certification that leverages MEF’s experience in certifying CE worldwide.


MEF remains on track to launch its MEF 3.0 SD-WAN Certification pilot program in 4Q 2019. This certification will test a set of service attributes and their behaviors defined in MEF 70 and described in detail in the upcoming MEF 3.0 SD-WAN Certification Test Requirements (MEF 90) document. Service and technology companies interested in participating in the pilot should contact Daniel Bar-Lev, MEF, (Daniel@mef.net).


MEF is dedicated to helping organizations overcome skills gaps that can impede successful network and service transformation, including in the domain of SD-WAN. Stay tuned for more information.


No. MEF is not creating SD-WAN protocols for vendor equipment interoperability standards. MEF is focused on defining an SD-WAN service with its attributes and policies that describe aspects of the SD-WAN service behavior or capability. This is regardless of how the provider or their SD-WAN vendor implements the service.


MEF19 offers an excellent opportunity for industry professionals to engage directly with the top service and technology professionals shaping the SD-WAN services market and leading MEF standardization and certification work. SD-WAN will be a dominant topic in MEF 3.0 Proof of Concept Showcase demonstrations and conference sessions at MEF19, held 18-22 November 2019 in Los Angeles, California. Visit http://www.MEF19.com for registration and event information.

The following links offer useful information available to all industry professionals:

More detailed information is available to MEF members on the MEF Applications Committee Home page on the MEF wiki. Contributions to the SD-WAN work are welcomed. Send an inquiry to sd-wan@mef.net for more details on how you can participate.

MEF’s Enterprise Advisory Council (EAC) offers an excellent opportunity for enterprises to learn more about and influence MEF work related to SD-WAN, application security, service automation, and other MEF 3.0 initiatives. The EAC is as a collaborative council of leading enterprises designed to strengthen the channels of communications among end-users, service providers, and vendors involved in digital transformation initiatives. We have a limited number of seats remaining open on the council for large to multi-national enterprises, and participation is free. Enterprises can learn more about this program by contacting eacinfo@mef.net.


The following are examples of public comments from leading service, technology, and market research professionals on MEF’s SD-WAN standardization work and its relevance to the indsutry.

Roman Pacewicz, Chief Product Officer, AT&T Business
“We’re seeing a significant change in how customers are using SD-WAN now versus two years ago, and that evolution is what makes service standards from MEF so critical. Today, and moving forward, SD-WAN is about delivering application performance. As the underlying networks — Optical Transport, Carrier Ethernet, and IP — are under greater pressure to be more ubiquitous, easy to provision, on-demand and elastic, that is where the MEF 3.0 construct comes into play. MEF’s role is creating a standards-based, intelligent network across multiple carriers that will eliminate friction as we work with each other to deliver application performance at the level of efficiency our customers are seeking.”

Robert Victor, Senior Vice President of Product Management, Comcast Business
"MEF 3.0 SD-WAN standardization is a critical contribution to the industry, helping eliminate obstacles to the market adoption of SD-WAN. MEF is committed to establishing a common terminology and set of standards for industry stakeholders. We’re excited to see how this helps speed our customers transition from legacy to next generation SD-WAN networks like Comcast Business’s ActiveCore™ platform.”

Shawn Hakl, Senior Vice President Business Products, Verizon
“Verizon is pleased to support MEF’s industry-leading SD-WAN standardization work. SD-WAN is the way to interface policy with an intelligent software defined network, and standardization makes it easier for integration to work across multiple types of underlying transport services. What that means for our end customers is it lets them get a better overall experience relative to their applications, with support for a broader range of use cases, guaranteed service resiliency, and improved service capabilities in an always on, always connected world.”

Laurent Perrin, Head of Application Driven Networks, Connectivity, Orange Business Services
“Orange Business Services is very pleased to support the first MEF SD-WAN standard. Our customers are expecting agile and application driven network services and we believe that this new standard will facilitate the adoption and deployment of SD-WAN and meet their expectations. We look forward to working with MEF on ongoing initiatives to develop the interoperability of SD-WAN solutions and to define standardized APIs that will allow to integrate SD-WAN in a simplified and fully secured end-to-end orchestration model, from the end user to the applications.”

Mirko Voltolini, Global Head of Network of Demand, Colt Technology Services
“The MEF 70 standard sets the foundation for the adoption of common SD-WAN service attributes between service providers. The definition of a common standard for SD-WAN services will allow the industry to coordinate and align on the technology development. It will enable us to build end to end services across disparate service providers’ domains and serve our global customer needs.”

Michael Strople, President, Allstream
“Customers are embracing SD-WAN to improve network performance, obtain affordable and reliable connectivity to cloud applications, and gain greater visibility and control over network services. MEF’s SD-WAN service standardization will benefit all industry stakeholders by eliminating confusion regarding SD-WAN service components, core capabilities, and concepts. Standardization also will enable service and technology providers to focus on providing a core set of common capabilities and then building on that for differentiated offerings, helping ensure maximum flexibility for customers.”

Ralph Santitoro, Head of SDN/NFV/SD-WAN Services, Fujitsu Network Communications
“SD-WAN services are transformative and have raised the expectations for network services. They enable subscribers to focus on application performance and visibility and apply policies to regulate compliance based on business importance and security. SD-WAN services also facilitate and accelerate an enterprise’s multi-cloud digital transformation. The MEF 70 standard is the commencement of several MEF SD-WAN projects that I anticipate will simplify operations and accelerate the time to sell, deploy and support SD-WAN services.”

Sunil Khandekar, Founder & CEO, Nuage Networks
“We are very pleased with MEF’s very fast progress in standardizing SD-WAN services. MEF brings industry-recognized standardization to a rapidly developing SD-WAN marketplace by defining both SD-WAN services and open APIs that provide an essential foundation for utilizing the full power of SDN and NFV technologies. By leveraging this framework, SD-WANs can be deployed in a fully disaggregated fashion on an open CPE platform and provide comprehensive SD-WAN functionality as well as on-demand service chaining of VNFs to provide the flexibility and choice that enterprises need from SD-WAN solutions.”

Mike Sapien, Chief Analyst, Ovum Enterprise Services
“The MEF SD-WAN standard efforts come at a good time as customer adoption starts to increase and service providers struggle to keep up with market demand. Hybrid networking, including SD-WAN services, can only grow in adoption and deployment, and having the same definitions and standard for comparison should make it easier for the providers and customers to understand the various service attributes and confirm feature alignment. Customers are becoming more aware of the more common features beyond routing and having this standard as a reference will help in current and future deployments.”

Jennifer Clark, Principal Analyst, Heavy Reading
“The momentum of SD-WAN adoption, along with the large and ever-growing community of players in the SD-WAN ecosystem – vendors, service providers and enterprises – has created an information vacuum in terms of how we deploy SD-WAN over multiple underlay connectivity services and across multiple service provider networks. The MEF SD-WAN standard is the first step to addressing this vacuum with a common language by which we can define SD-WAN services and service attributes. This and the MEF follow-on SD-WAN standards are the building blocks leading to a MEF SD-WAN certification process, which enterprise SD-WAN customers will need as they evaluate and deploy SD-WAN services.”

Rosemary Cochran, Principal Analyst & Co-Founder, Vertical Systems Group
“In the latest MEF/Vertical survey, service providers worldwide cited the lack of an industry-accepted SD-WAN definition as a major business challenge. MEF is tackling this key issue with the first SD-WAN Service Standard resource that defines the common terminology and framework needed by service providers and technology suppliers working to expand the SD-WAN market.”

Greg Bryan, Senior Manager, Enterprise Research, TeleGeography
"Our WAN Manager Survey indicates that in 2018 fewer than 1/5th of enterprises had already installed SD-WAN and 1/3 were still researching their SD-WAN options. With dozens of potential suppliers to choose from – from technology start-ups to large SD-WAN managed service providers – WAN managers will benefit from the standards MEF has worked to create in this space."


Get the Latest on MEF 3.0 SD-WAN
MEF 3.0 SD-WAN Initiatives
 Engage in development of MEF 70.1 (Phase 2 of the SD-WAN Service
Participate in pilot MEF 3.0 SD-WAN Service Certification 
 Assist SD-WAN skills development with MEF 3.0 SDN/NFV Professional
          Training & Certification
 Contribute to MEF SD-WAN-focused standardization projects: LSO APIs,
          Application Security and Intent Based Networking