|By Lori MacVittie||
|December 19, 2012 09:00 AM EST||
Now, if we look at the benefits we can attempt to infer what the problems SDN is trying to solve:
|Programmability||Network components today, particularly hardware-based components, run specific feature sets that can only be modified by the vendor, which happens on a 12-18 month schedule, security and hot-fixes not withstanding. New features and functions can only be added by the vendor based on their prioritization, not the customer.|
|Automation||Manual configuration of network components is time consuming, costly, and introduces a higher risk of human error that can result in outages, poor performance, or security risks.|
|Network control||The network today doesn't adapt rapidly to changing conditions or events. While some protocols simulate such adaptability, these protocols can't autonomously route around outages or failures or modify existing policies easily.|
These are certainly problems for IT organizations of a variety of sizes and composition. The question then is, how does SDN uniquely solve those problems?
The answer is that as a concrete solution (i.e. components, software, and architectures) it does not uniquely solve the problem. As a concept, however, it does.
Someone's no doubt quite upset at the moment at that statement. Let's explain it before someone's head explodes.
CONCEPT versus CONCRETE
The concept of separating data and control plane enables programmability. Without that separation, we have what we have today – static, inflexible networking components. But the concept of separating data and control planes isn't unique to solutions labeled specifically SDN. ADN is a good example of this (you saw that coming, didn't you?)
A network component can – and this may surprise some people – internally decouple control and data planes. Yeah, I know, right? And doing so enables a platform that looks a whole lot like SDN diagrams, doesn't it – with plug-ins and programmability. This occurs in full-proxy architectures when there exist dual stacks – one on the client side, one on the server side. Where traffic transitions from one stack to the other exists an opportunity to inspect, to manipulate, to modify, the traffic. Because the architecture requires acting as an endpoint to clients (and conversely as the point of origin for the server side), protocols can even be implemented in this "no man's land" between client and server. That enables protocol transitioning, such as enabling SPDY on the outside while still speaking HTTP on the inside or IPv4 to servers while supporting IPv6 on the client (and vice-versa).
Where the separation occurs is not necessarily as important as the fact that it exists – unless you're focused on concrete, SDN-labeled solutions as being the only solutions that can provide the flexibility that programmability offers.
Automation occurs by exposing the management plane through an API (or implementing a specific API, such as OpenFlow) such that operational tasks and configuration can be achieved through tools instead of time.
Between automation and programmability, you realize network control.
Now, this is not SDN, at least not in terms of protocol support and concrete architecture. But it is software-defined, and it is networking, so does it count?
I guess it depends. ADN has always approached layers 4-7 with an eye toward extensibility, programmability and control that enables agility in the network. We didn't call it SDN and I don't see the industry deciding to "SDN-wash" existing ADN solutions as SDN just because a new term came along and became the TLA du jour.
What I do see is that ADN and specifically full-proxy based ADC (application delivery controllers) already offer the same benefits using the same concepts as SDN. Consider again the core characteristics of SDN:
1. Control and data planes are decoupled
2. Intelligence and state are logically centralized
3. Underlying network infrastructure abstracted from applications
All of these characteristics are present in an ADN. The ability to leverage network-side scripting on the control plane side of the equation enables extensibility, rapid innovation, and ability to adapt to support new protocols, new applications, new business requirements – all without involving the vendor. Which is exactly one of the benefits cited for SDN solutions and specifically OpenFlow-enabled architectures.
So the question really is, does it matter if a solution to the problem of "agility in the network" is a concrete or conceptual SDN solution if it ultimately solves the same set of problems?
17th Cloud Expo, taking place Nov 3-5, 2015, 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. Meanwhile, 94% of enterprises ar...
Jul. 3, 2015 08:00 PM EDT Reads: 667
The 5th International DevOps Summit, co-located with 17th International Cloud Expo – being held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the ...
Jul. 3, 2015 07:15 PM EDT Reads: 577
DevOps Summit, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th 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 wait for long development...
Jul. 3, 2015 07:00 PM EDT Reads: 697
IT data is typically silo'd by the various tools in place. Unifying all the log, metric and event data in one analytics platform stops finger pointing and provides the end-to-end correlation. Logs, metrics and custom event data can be joined to tell the holistic story of your software and operations. For example, users can correlate code deploys to system performance to application error codes. In his session at DevOps Summit, Michael Demmer, VP of Engineering at Jut, will discuss how this can...
Jul. 3, 2015 07:00 PM EDT Reads: 861
"Plutora provides release and testing environment capabilities to the enterprise," explained Dalibor Siroky, Director and Co-founder of Plutora, in this SYS-CON.tv interview at @DevOpsSummit, held June 9-11, 2015, at the Javits Center in New York City.
Jul. 3, 2015 06:30 PM EDT Reads: 1,256
The 17th International Cloud Expo has announced that its Call for Papers is open. 17th International Cloud Expo, to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, APM, APIs, Microservices, Security, Big Data, Internet of Things, DevOps and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding bu...
Jul. 3, 2015 05:30 PM EDT Reads: 552
"AgilData is the next generation of dbShards. It just adds a whole bunch more functionality to improve the developer experience," noted Dan Lynn, CEO of AgilData, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
Jul. 3, 2015 05:00 PM EDT Reads: 934
The basic integration architecture, as defined by ESBs, hasn’t changed for more than a decade. Most cloud integration providers still rely on an ESB architecture and their proprietary connectors. As a result, enterprise integration projects suffer from constraints of availability and reliability of these connectors that are not re-usable across other integration vendors. However, the rapid adoption of APIs and almost ubiquitous availability of APIs amongst most SaaS and Cloud applications are ra...
Jul. 3, 2015 04:45 PM EDT Reads: 857
SYS-CON Events announced today that Secure Infrastructure & Services will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Secure Infrastructure & Services (SIAS) is a managed services provider of cloud computing solutions for the IBM Power Systems market. The company helps mid-market firms built on IBM hardware platforms to deploy new levels of reliable and cost-effective computing and hig...
Jul. 3, 2015 04:15 PM EDT Reads: 699
"We help to transform an organization and their operations and make them more efficient, more agile, and more nimble to move into the cloud or to move between cloud providers and create an agnostic tool set," noted Jeremy Steinert, DevOps Services Practice Lead at WSM International, in this SYS-CON.tv interview at @DevOpsSummit, held June 9-11, 2015, at the Javits Center in New York City.
Jul. 3, 2015 02:45 PM EDT Reads: 829
The most often asked question post-DevOps introduction is: “How do I get started?” There’s plenty of information on why DevOps is valid and important, but many managers still struggle with simple basics for how to initiate a DevOps program in their business. They struggle with issues related to current organizational inertia, the lack of experience on Continuous Integration/Delivery, understanding where DevOps will affect revenue and budget, etc. In their session at DevOps Summit, JP Morgenthal...
Jul. 3, 2015 02:45 PM EDT Reads: 918
One of the hottest areas in cloud right now is DRaaS and related offerings. In his session at 16th Cloud Expo, Dale Levesque, Disaster Recovery Product Manager with Windstream's Cloud and Data Center Marketing team, will discuss the benefits of the cloud model, which far outweigh the traditional approach, and how enterprises need to ensure that their needs are properly being met.
Jul. 3, 2015 02:00 PM EDT Reads: 2,183
The time is ripe for high speed resilient software defined storage solutions with unlimited scalability. ISS has been working with the leading open source projects and developed a commercial high performance solution that is able to grow forever without performance limitations. In his session at Cloud Expo, Alex Gorbachev, President of Intelligent Systems Services Inc., shared foundation principles of Ceph architecture, as well as the design to deliver this storage to traditional SAN storage co...
Jul. 3, 2015 02:00 PM EDT Reads: 2,144
Discussions about cloud computing are evolving into discussions about enterprise IT in general. As enterprises increasingly migrate toward their own unique clouds, new issues such as the use of containers and microservices emerge to keep things interesting. In this Power Panel at 16th Cloud Expo, moderated by Conference Chair Roger Strukhoff, panelists addressed the state of cloud computing today, and what enterprise IT professionals need to know about how the latest topics and trends affect t...
Jul. 3, 2015 12:30 PM EDT Reads: 1,401
"We provide a web application framework for building really sophisticated web applications that run on a browser without any installation need so we get used for biotech, defense, and banking applications," noted Charles Kendrick, CTO and Chief Architect at Isomorphic Software, in this SYS-CON.tv interview at @DevOpsSummit (http://DevOpsSummit.SYS-CON.com), held June 9-11, 2015, at the Javits Center in New York
Jul. 3, 2015 12:30 PM EDT Reads: 1,289
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society-changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his session at @ThingsExpo, Jason Mondanaro, Director, Product Management at Metanga, discussed how you can plan to cooperate, partner, and form lasting all-star teams to change the world...
Jul. 3, 2015 12:00 PM EDT Reads: 2,384
In the midst of the widespread popularity and adoption of cloud computing, it seems like everything is being offered “as a Service” these days: Infrastructure? Check. Platform? You bet. Software? Absolutely. Toaster? It’s only a matter of time. With service providers positioning vastly differing offerings under a generic “cloud” umbrella, it’s all too easy to get confused about what’s actually being offered. In his session at 16th Cloud Expo, Kevin Hazard, Director of Digital Content for SoftL...
Jul. 3, 2015 12:00 PM EDT Reads: 2,338
"What Dyn is able to do with our Internet performance and our Internet intelligence is give companies visibility into what is actually going on in that cloud," noted Corey Hamilton, Product Marketing Manager at Dyn, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
Jul. 3, 2015 11:45 AM EDT Reads: 927
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi’s VP Business Development and Engineering, will explore the IoT cloud-based platform technologies drivi...
Jul. 3, 2015 11:45 AM EDT Reads: 1,261
Containers have changed the mind of IT in DevOps. They enable developers to work with dev, test, stage and production environments identically. Containers provide the right abstraction for microservices and many cloud platforms have integrated them into deployment pipelines. DevOps and Containers together help companies to achieve their business goals faster and more effectively. In his session at DevOps Summit, Ruslan Synytsky, CEO and Co-founder of Jelastic, reviewed the current landscape of...
Jul. 3, 2015 11:15 AM EDT Reads: 2,391