Click here to close now.



Welcome!

IoT User Interface Authors: Tom Kelly, Liz McMillan, Elizabeth White, Carmen Gonzalez, Pat Romanski

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
More and more companies are looking to microservices as an architectural pattern for breaking apart applications into more manageable pieces so that agile teams can deliver new features quicker and more effectively. What this pattern has done more than anything to date is spark organizational transformations, setting the foundation for future application development. In practice, however, there are a number of considerations to make that go beyond simply “build, ship, and run,” which changes ho...
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 ad...
As enterprises work to take advantage of Big Data technologies, they frequently become distracted by product-level decisions. In most new Big Data builds this approach is completely counter-productive: it presupposes tools that may not be a fit for development teams, forces IT to take on the burden of evaluating and maintaining unfamiliar technology, and represents a major up-front expense. In his session at @BigDataExpo at @ThingsExpo, Andrew Warfield, CTO and Co-Founder of Coho Data, will dis...
Advances in technology and ubiquitous connectivity have made the utilization of a dispersed workforce more common. Whether that remote team is located across the street or country, management styles/ approaches will have to be adjusted to accommodate this new dynamic. In his session at 17th Cloud Expo, Sagi Brody, Chief Technology Officer at Webair Internet Development Inc., focused on the challenges of managing remote teams, providing real-world examples that demonstrate what works and what do...
SYS-CON Events announced today that Men & Mice, the leading global provider of DNS, DHCP and IP address management overlay solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. The Men & Mice Suite overlay solution is already known for its powerful application in heterogeneous operating environments, enabling enterprises to scale without fuss. Building on a solid range of diverse platform support,...
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
SYS-CON Events announced today that AppNeta, the leader in performance insight for business-critical web applications, will exhibit and present at SYS-CON's @DevOpsSummit at Cloud Expo New York, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. AppNeta is the only application performance monitoring (APM) company to provide solutions for all applications – applications you develop internally, business-critical SaaS applications you use and the networks that deli...
It's easy to assume that your app will run on a fast and reliable network. The reality for your app's users, though, is often a slow, unreliable network with spotty coverage. What happens when the network doesn't work, or when the device is in airplane mode? You get unhappy, frustrated users. An offline-first app is an app that works, without error, when there is no network connection.
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, will provide an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profes...
Father business cycles and digital consumers are forcing enterprises to respond faster to customer needs and competitive demands. Successful integration of DevOps and Agile development will be key for business success in today’s digital economy. In his session at DevOps Summit, Pradeep Prabhu, Co-Founder & CEO of Cloudmunch, covered the critical practices that enterprises should consider to seamlessly integrate Agile and DevOps processes, barriers to implementing this in the enterprise, and pr...
Cognitive Computing is becoming the foundation for a new generation of solutions that have the potential to transform business. Unlike traditional approaches to building solutions, a cognitive computing approach allows the data to help determine the way applications are designed. This contrasts with conventional software development that begins with defining logic based on the current way a business operates. In her session at 18th Cloud Expo, Judith S. Hurwitz, President and CEO of Hurwitz & ...
As someone who has been dedicated to automation and Application Release Automation (ARA) technology for almost six years now, one of the most common questions I get asked regards Platform-as-a-Service (PaaS). Specifically, people want to know whether release automation is still needed when a PaaS is in place, and why. Isn't that what a PaaS provides? A solution to the deployment and runtime challenges of an application? Why would anyone using a PaaS then need an automation engine with workflow ...
SYS-CON Events announced today that VAI, a leading ERP software provider, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. VAI (Vormittag Associates, Inc.) is a leading independent mid-market ERP software developer renowned for its flexible solutions and ability to automate critical business functions for the distribution, manufacturing, specialty retail and service sectors. An IBM Premier Business Part...
SYS-CON Events announced today that Alert Logic, Inc., the leading provider of Security-as-a-Service solutions for the cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Alert Logic, Inc., provides Security-as-a-Service for on-premises, cloud, and hybrid infrastructures, delivering deep security insight and continuous protection for customers at a lower cost than traditional security solutions. Ful...
In most cases, it is convenient to have some human interaction with a web (micro-)service, no matter how small it is. A traditional approach would be to create an HTTP interface, where user requests will be dispatched and HTML/CSS pages must be served. This approach is indeed very traditional for a web site, but not really convenient for a web service, which is not intended to be good looking, 24x7 up and running and UX-optimized. Instead, talking to a web service in a chat-bot mode would be muc...
SYS-CON Events announced today that Catchpoint Systems, Inc., a provider of innovative web and infrastructure monitoring solutions, has been named “Silver Sponsor” of SYS-CON's DevOps Summit at 18th Cloud Expo New York, which will take place June 7-9, 2016, at the Javits Center in New York City, NY. Catchpoint is a leading Digital Performance Analytics company that provides unparalleled insight into customer-critical services to help consistently deliver an amazing customer experience. Designed...
With an estimated 50 billion devices connected to the Internet by 2020, several industries will begin to expand their capabilities for retaining end point data at the edge to better utilize the range of data types and sheer volume of M2M data generated by the Internet of Things. In his session at @ThingsExpo, Don DeLoach, CEO and President of Infobright, will discuss the infrastructures businesses will need to implement to handle this explosion of data by providing specific use cases for filte...
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies adopt disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevO...
SYS-CON Events announced today that Fusion, a leading provider of cloud services, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Fusion, a leading provider of integrated cloud solutions to small, medium and large businesses, is the industry's single source for the cloud. Fusion's advanced, proprietary cloud service platform enables the integration of leading edge solutions in the cloud, including clou...
Your business relies on your applications and your employees to stay in business. Whether you develop apps or manage business critical apps that help fuel your business, what happens when users experience sluggish performance? You and all technical teams across the organization – application, network, operations, among others, as well as, those outside the organization, like ISPs and third-party providers – are called in to solve the problem.