Welcome!

Machine Learning Authors: Liz McMillan, William Schmarzo, Pat Romanski, Yeshim Deniz, Elizabeth White

Related Topics: SDN Journal, Java IoT, Microservices Expo, Containers Expo Blog, @CloudExpo, @BigDataExpo

SDN Journal: Blog Feed Post

Agility, SDN and Service Frameworks

It's that time in the SDN hype cycle where people are beginning to lay out a more solid vision of what it means to them

It's that time in the SDN hype cycle where people are beginning to lay out a more solid vision of what it means to them. Themes are beginning to emerge on the foundations laid by ONF that include the necessary separation of control and data (forwarding) planes, but some are still missing critical components - the ones that enable agility of the business, not just the network.

Juniper's Bob Muglia recently published a post called "Decoding SDN" that expounds upon Juniper's vision of SDN. It's a well written lengthy piece that's definitely worth a read if you not only want to understand Juniper's strategy but if you want to gain a bit more insight into how SDN is being approached.

One thing that jumped out at me was Bob's "Four Planes of Networking". Generally speaking it was an excellent distillation of the SDN concept. But something was missing, in my opinion. It did not adequately encapsulate the notion of how or where SDN enables one of its most important purported benefits: agility.

Let's review the basic definition of agility, shall we?

a·gil·i·ty

1.the power of moving quickly and easily; nimbleness: exercises demanding agility.

A fairly nebulous definition and Bob's description of the four planes of networking certainly can be construed to fulfill the requirements of agility. After all, merely separating control from data (forwarding) plane combined with a standardized management plane enables a fair amount of agility in the network, certainly more than what existed before the concept of SDN began disrupting the entire networking community.

But agility isn't just about being able to rapidly change forwarding tables, it's about being able to respond to operational and business conditions. It's about being able to implement new functionality, if necessary, that enables innovative business ideas to be realized in the network, which almost always must deliver that business idea to customers, employees, or partners.

What I found missing from Bob's discussion was programmability of the network, that is, not just the ability to programmatically modify configuration, but to programmatically modify the behavior (and thus the delivery mechanisms) of the network.

Bob's diagram and explanation (shortened for brevity):

The Four Planes of Networking

Inside every networking and security device – every switch, router, and firewall - you can separate the software into four layers or planes.  As we move to SDN, these planes need to be clearly understood and cleanly separated.  This is absolutely essential in order to build the next generation, highly scalable network.

networkplanes.jpg
Forwarding.
The bottom plane, Forwarding, does the heavy lifting of sending the network packets on their way.


Control. If the Forwarding plane is the brawn of the network, Control is the brains.  The Control plane understands the network topology and makes the decisions on where the flow of network traffic should go.


Services. Sometimes network traffic requires more processing and for this, the Services plane does the job.  Not all networking devices have a Services plane – you won’t find this plane in a simple switch.  But for many routers and all firewalls, the Services plane does the deep thinking, performing the complex operations on networking data that cannot be accomplished by the Forwarding hardware.  Services are the place where firewalls stop the bad guys and parental controls are enforced.


Management. Like all computers, network devices need to be configured, or managed.  The Management plane provides the basic instructions of how the network device should interact with the rest of the network.

 

http://forums.juniper.net/t5/The-New-Network/Decoding-SDN/ba-p/174651

I hope Bob does not take it amiss if I modify and expand upon his network plane diagram.

First, I think management should not be portrayed as part of the network planes. It's not part of the network - not really - nor should it be. The separation of management from network plane as a matter of technical architecture and implementation is well-established as a best practice to ensure continued access to devices that have failed or are overwhelmed. I don't think Bob's intention was to imply the management plane was coupled to the network plane in such a manner, but diagrams using an east or west-bound management placement tend to disseminate the actual separation a bit better, so I've moved it off to the side and broadened it to ensure it covers not only control but services as well.

Which is the next layer I think needs some expansion.

A SERVICE FRAMEWORK

One of the core premises of SDN is the ability to programmatically extend the functionality of the "network" through plug-ins, add-ons, or applications - whatever you want to call them, they're the same thing - I'm going to refer to them as services as I think Bob took the right approach with the service nomenclature. But rather than use the all encompassing "services" I think we should view that layer as a service framework, upon which new services can be deployed - whether through plug-ins or a direct programmatic interface or through a less coupled API. However it occurs, a set of base network services are available in the framework that can be extended. That's where additional value is added, where new network functionality is deployed, and what makes it possible to use the same network "equipment" to deploy a variety of functions. The same "equipment" should be distilled down to a common set of networking services but be able to support firewall services on one, application acceleration on another, and load balancing on yet another.

This concept draws from the idea of a platform in the development world. Developers do not write their own network stacks, or even application-transport (HTTP) stacks. They develop functionality atop a common framework that enables them to modify behavior such that a highly secure, banking application can be deployed on the same common platform as a completely open picture sharing application. The platform is deployed, managed, configured and operated in the same way but the applications, ah, the applications have very different profiles.

The same concept must be applied to the network and to SDN-enabled solutions. It's not enough to provide separation of control and forwarding to enable agility. To enable true agility requires the inclusion of a services platform capable of extending functionality without introducing additional operational overhead into the core "stack".

There's a lot more in Bob's discussion, including an interesting view of "SDN Chaining" which I will not get into here because this is long enough that your coffee is likely cold by now. Suffice it to say it's an interesting read and I find valuable nuggets in his discussion and think such posts are necessary to start really figuring out where this SDN thing is going to go.

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.

@CloudExpo Stories
Amazon started as an online bookseller 20 years ago. Since then, it has evolved into a technology juggernaut that has disrupted multiple markets and industries and touches many aspects of our lives. It is a relentless technology and business model innovator driving disruption throughout numerous ecosystems. Amazon’s AWS revenues alone are approaching $16B a year making it one of the largest IT companies in the world. With dominant offerings in Cloud, IoT, eCommerce, Big Data, AI, Digital Assista...
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...
For organizations that have amassed large sums of software complexity, taking a microservices approach is the first step toward DevOps and continuous improvement / development. Integrating system-level analysis with microservices makes it easier to change and add functionality to applications at any time without the increase of risk. Before you start big transformation projects or a cloud migration, make sure these changes won’t take down your entire organization.
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...
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
21st International Cloud Expo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Me...
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.
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 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...
"We are a monitoring company. We work with Salesforce, BBC, and quite a few other big logos. We basically provide monitoring for them, structure for their cloud services and we fit into the DevOps world" explained David Gildeh, Co-founder and CEO of Outlyer, in this SYS-CON.tv interview at DevOps Summit at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
DevOps at Cloud Expo, 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 widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time to w...
SYS-CON Events announced today that Enzu will exhibit at SYS-CON's 21st Int\ernational Cloud Expo®, which will take place October 31-November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Enzu’s mission is to be the leading provider of enterprise cloud solutions worldwide. Enzu enables online businesses to use its IT infrastructure to their competitive advantage. By offering a suite of proven hosting and management services, Enzu wants companies to focus on the core of their ...
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...
Cloud Expo, Inc. has announced today that Andi Mann and Aruna Ravichandran have been named Co-Chairs of @DevOpsSummit at Cloud Expo Silicon Valley which will take place Oct. 31-Nov. 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. "DevOps is at the intersection of technology and business-optimizing tools, organizations and processes to bring measurable improvements in productivity and profitability," said Aruna Ravichandran, vice president, DevOps product and solutions marketing...
Automation is enabling enterprises to design, deploy, and manage more complex, hybrid cloud environments. Yet the people who manage these environments must be trained in and understanding these environments better than ever before. A new era of analytics and cognitive computing is adding intelligence, but also more complexity, to these cloud environments. How smart is your cloud? How smart should it be? In this power panel at 20th Cloud Expo, moderated by Conference Chair Roger Strukhoff, pane...
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...
What's the role of an IT self-service portal when you get to continuous delivery and Infrastructure as Code? This general session showed how to create the continuous delivery culture and eight accelerators for leading the change. Don Demcsak is a DevOps and Cloud Native Modernization Principal for Dell EMC based out of New Jersey. He is a former, long time, Microsoft Most Valuable Professional, specializing in building and architecting Application Delivery Pipelines for hybrid legacy, and cloud ...
SYS-CON Events announced today that IBM has been named “Diamond Sponsor” of SYS-CON's 21st Cloud Expo, which will take place on October 31 through November 2nd 2017 at the Santa Clara Convention Center in Santa Clara, California.
In his session at Cloud Expo, Alan Winters, an entertainment executive/TV producer turned serial entrepreneur, presented a success story of an entrepreneur who has both suffered through and benefited from offshore development across multiple businesses: The smart choice, or how to select the right offshore development partner Warning signs, or how to minimize chances of making the wrong choice Collaboration, or how to establish the most effective work processes Budget control, or how to ma...