Welcome!

Artificial Intelligence Authors: Elizabeth White, Liz McMillan, Pat Romanski, Rajeev Kozhikkattuthodi, Yeshim Deniz

Related Topics: SDN Journal

SDN Journal: Blog Feed Post

F5 Application Layer SDN: Now with Extreme Programmability

As you move up the network stack, you move from directing packets to managing flows

"If you look at the standard SDN model, [Layer 4-7 services] are applications that can basically run on the [SDN] controller platform. But that's not the only way to do them. We'll hear about different approaches. Network services for SDN are going to be a big story in 2013."

-- Brad Casemore, "Networking outlook: Controllers, Layer 4-7 will roil SDN 2013 market" [emphasis mine]

Since SDN became the darling du jour of the networking industry, there's been a lot of head nodding and ancillary mention of L4-7 services eventually becoming part of the overall fabric. What there hasn't been is a lot of discussion on the challenges inherent in bringing those services to bear in what has become the de facto standard model: a centralized controller responsible for directing the flow of packets throughout the network.

That's challenging, because as you move up the network stack there's a natural evolution that occurs. You move from directing packets to managing flows, and managing flows requires a completely different set of features. That's because the closer to layer 7 you get, the more stateful the network necessarily must become. It can no longer act on individual packets; it must aggregate those packets and it must do it often - far more often than is presupposed when working at layer 2 and 3 of the network stack.

John Giacomoni said it well when he explained in a recent post, "Beyond SDN Fabric: Complex problems require L7+ SDN technologies":

“To implement even basic load balancing with OpenFlow the majority of packets, and all ACKs in particular, need to be forwarded to the controller so session flow state can be accurately tracked.”

Consider that in a router, about 1 in every 1 million packets needs to be forwarded to the controller. In a switch, that ratio is on the order of 1 in every 1 billion. For TCP that ratio drops to a mere 1 out of every 10 packets. If you climb a bit higher in the network stack to layer 7, you might as well consider every packet a candidate to be forwarded on to the controller.

The SDN model upon which most solutions today are based work on the assumption that most packets don't need to be examined by the controller. Thus they are able to scale and maintain wire speed while adding agility and programmability to the lower layers of the network.

A different model is required for Application Layer SDN to ensure agility and performance can be maintained while gaining the benefits of application intelligence and programmability. The SDN Network Fabric (layer 2-3) operates on the premise of centralized control and execution. The SDN Application Services Fabric (layer 4-7) must operate on the premise of centralized control and decentralized execution in order to scale without sacrificing the many benefits of stateful network devices enjoyed by current models of network architecture such as security-related functions, fault tolerance and isolation, and performance enhancing services.

Extreme Programmability: Enter LineRate Systems

As SDN matures, its focus will continue to move up the network stack, toward the application layers. The programmable, scalable services at the application layer comprising the Application Services Fabric are necessary to fully realize the benefits of SDN and software-defined data centers, particularly in environments where network function virtualization (NFV) is adopted as a strategy to achieve maximum agility. Network function virtualization requires not only the improved performance of today’s modern x86 hardware platforms, but software capable of scaling on demand while maintaining optimal performance and offering a high-degree of programmability for superior software defined control over the network.

Programmability is required for reducing operational costs through automation and centralized control, but it is also needed to enable customers to develop innovative, application-specific services that work in concert with SDN architectures. Critical to the success of these architectures are security, acceleration, optimization, and routing services at the application layers that are able to meet modern expectations of flexibility, scale, and performance.

LineRate brings a programmable, scalable platform to the Application Layer SDN table. Its platform is not only capable of scaling on demand and meeting performance expectations on commoditized x86 hardware, but it is highly programmable. In fact it is designed specifically to be programmed to execute purpose-built business and operational logic at high speeds. It's a proxy-based architecture, similar to that of F5 BIG-IP, and offers what I can only describe as "extreme programmability" as its core capability. Rather than insert lightweight rules into the data plane as is the operating procedure for SDN L2-3 fabrics, LineRate SDN Services act as independently operating service nodes that maintain the scaling properties expected of SDN solutions and of modern high-availability architectures, i.e. unlike the centralized SDN controller architecture, a decentralized execution model is fault tolerant even when maintaining state, a requirement for the Application Services Fabric.

As networks continue to become commoditized, it is the application layer services in an SDN that will provide organizations with the competitive advantage they need. A programmable data path is required for organizations desiring to roll their own services and it must be scalable and fast; organizations are unwilling (and rightfully so) to sacrifice performance. LineRate Systems offers such a platform and its addition to the F5 portfolio expands F5's continued leadership in application layer networking in both traditional and Application Layer SDN architectures.

Read the original blog entry...

More Stories By Lori MacVittie

Lori MacVittie is responsible for education and evangelism of application services available across F5’s entire product suite. Her role includes authorship of technical materials and participation in a number of community-based forums and industry standards organizations, among other efforts. MacVittie has extensive programming experience as an application architect, as well as network and systems development and administration expertise. Prior to joining F5, MacVittie was an award-winning Senior Technology Editor at Network Computing Magazine, where she conducted product research and evaluation focused on integration with application and network architectures, and authored articles on a variety of topics aimed at IT professionals. Her most recent area of focus included SOA-related products and architectures. She holds a B.S. in Information and Computing Science from the University of Wisconsin at Green Bay, and an M.S. in Computer Science from Nova Southeastern University.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@ThingsExpo Stories
In his session at @ThingsExpo, Eric Lachapelle, CEO of the Professional Evaluation and Certification Board (PECB), provided an overview of various initiatives to certify the security of connected devices and future trends in ensuring public trust of IoT. Eric Lachapelle is the Chief Executive Officer of the Professional Evaluation and Certification Board (PECB), an international certification body. His role is to help companies and individuals to achieve professional, accredited and worldwide re...
IoT solutions exploit operational data generated by Internet-connected smart “things” for the purpose of gaining operational insight and producing “better outcomes” (for example, create new business models, eliminate unscheduled maintenance, etc.). The explosive proliferation of IoT solutions will result in an exponential growth in the volume of IoT data, precipitating significant Information Governance issues: who owns the IoT data, what are the rights/duties of IoT solutions adopters towards t...
With the introduction of IoT and Smart Living in every aspect of our lives, one question has become relevant: What are the security implications? To answer this, first we have to look and explore the security models of the technologies that IoT is founded upon. In his session at @ThingsExpo, Nevi Kaja, a Research Engineer at Ford Motor Company, discussed some of the security challenges of the IoT infrastructure and related how these aspects impact Smart Living. The material was delivered interac...
The current age of digital transformation means that IT organizations must adapt their toolset to cover all digital experiences, beyond just the end users’. Today’s businesses can no longer focus solely on the digital interactions they manage with employees or customers; they must now contend with non-traditional factors. Whether it's the power of brand to make or break a company, the need to monitor across all locations 24/7, or the ability to proactively resolve issues, companies must adapt to...
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
No hype cycles or predictions of zillions of things here. IoT is big. You get it. You know your business and have great ideas for a business transformation strategy. What comes next? Time to make it happen. In his session at @ThingsExpo, Jay Mason, Associate Partner at M&S Consulting, presented a step-by-step plan to develop your technology implementation strategy. He discussed the evaluation of communication standards and IoT messaging protocols, data analytics considerations, edge-to-cloud tec...
New competitors, disruptive technologies, and growing expectations are pushing every business to both adopt and deliver new digital services. This ‘Digital Transformation’ demands rapid delivery and continuous iteration of new competitive services via multiple channels, which in turn demands new service delivery techniques – including DevOps. In this power panel at @DevOpsSummit 20th Cloud Expo, moderated by DevOps Conference Co-Chair Andi Mann, panelists examined how DevOps helps to meet the de...
When growing capacity and power in the data center, the architectural trade-offs between server scale-up vs. scale-out continue to be debated. Both approaches are valid: scale-out adds multiple, smaller servers running in a distributed computing model, while scale-up adds fewer, more powerful servers that are capable of running larger workloads. It’s worth noting that there are additional, unique advantages that scale-up architectures offer. One big advantage is large memory and compute capacity...
"When we talk about cloud without compromise what we're talking about is that when people think about 'I need the flexibility of the cloud' - it's the ability to create applications and run them in a cloud environment that's far more flexible,” explained Matthew Finnie, CTO of Interoute, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
The Internet giants are fully embracing AI. All the services they offer to their customers are aimed at drawing a map of the world with the data they get. The AIs from these companies are used to build disruptive approaches that cannot be used by established enterprises, which are threatened by these disruptions. However, most leaders underestimate the effect this will have on their businesses. In his session at 21st Cloud Expo, Rene Buest, Director Market Research & Technology Evangelism at Ara...
The current age of digital transformation means that IT organizations must adapt their toolset to cover all digital experiences, beyond just the end users’. Today’s businesses can no longer focus solely on the digital interactions they manage with employees or customers; they must now contend with non-traditional factors. Whether it's the power of brand to make or break a company, the need to monitor across all locations 24/7, or the ability to proactively resolve issues, companies must adapt to...
Artificial intelligence, machine learning, neural networks. We’re in the midst of a wave of excitement around AI such as hasn’t been seen for a few decades. But those previous periods of inflated expectations led to troughs of disappointment. Will this time be different? Most likely. Applications of AI such as predictive analytics are already decreasing costs and improving reliability of industrial machinery. Furthermore, the funding and research going into AI now comes from a wide range of com...
In this presentation, Striim CTO and founder Steve Wilkes will discuss practical strategies for counteracting fraud and cyberattacks by leveraging real-time streaming analytics. In his session at @ThingsExpo, Steve Wilkes, Founder and Chief Technology Officer at Striim, will provide a detailed look into leveraging streaming data management to correlate events in real time, and identify potential breaches across IoT and non-IoT systems throughout the enterprise. Strategies for processing massive ...
SYS-CON Events announced today that GrapeUp, the leading provider of rapid product development at the speed of business, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Grape Up is a software company, specialized in cloud native application development and professional services related to Cloud Foundry PaaS. With five expert teams that operate in various sectors of the market acr...
Internet of @ThingsExpo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 21st Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devic...
SYS-CON Events announced today that Ayehu will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on October 31 - November 2, 2017 at the Santa Clara Convention Center in Santa Clara California. Ayehu provides IT Process Automation & Orchestration solutions for IT and Security professionals to identify and resolve critical incidents and enable rapid containment, eradication, and recovery from cyber security breaches. Ayehu provides customers greater control over IT infras...
SYS-CON Events announced today that MobiDev, a client-oriented software development company, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. MobiDev is a software company that develops and delivers turn-key mobile apps, websites, web services, and complex software systems for startups and enterprises. Since 2009 it has grown from a small group of passionate engineers and business...
SYS-CON Events announced today that Cloud Academy named "Bronze Sponsor" of 21st International Cloud Expo which will take place October 31 - November 2, 2017 at the Santa Clara Convention Center in Santa Clara, CA. Cloud Academy is the industry’s most innovative, vendor-neutral cloud technology training platform. Cloud Academy provides continuous learning solutions for individuals and enterprise teams for Amazon Web Services, Microsoft Azure, Google Cloud Platform, and the most popular cloud com...
SYS-CON Events announced today that CA Technologies has been named "Platinum Sponsor" of SYS-CON's 21st International Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. CA Technologies helps customers succeed in a future where every business - from apparel to energy - is being rewritten by software. From planning to development to management to security, CA creates software that fuels transformation for companies in the applic...
We build IoT infrastructure products - when you have to integrate different devices, different systems and cloud you have to build an application to do that but we eliminate the need to build an application. Our products can integrate any device, any system, any cloud regardless of protocol," explained Peter Jung, Chief Product Officer at Pulzze Systems, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA