Welcome!

@BigDataExpo Authors: Yeshim Deniz, Elizabeth White, Liz McMillan, Pat Romanski, William Schmarzo

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

SDN Journal: Article

Using OpenFlow to Extend Software Defined Networking

OpenFlow’s Role in One-Stop Shopping for Control of Enterprise Cloud, Storage and Network Resources

Using OpenFlow to extend software-defined networking (SDN) to the optical layer is a compelling prospect for enterprises seeking to achieve joint orchestration of information technology (IT) and network resources for cloud services, to virtualize the network and to more simply manage interconnections of distributed data centers that require synchronization.

Today's fragmented, specialized management and control approaches are fraught with proprietary protocols and management systems, limited scalability and configuration complexities. With an OpenFlow-enabled transport network, an enterprise could instead engage in a kind of "one-stop shopping" for control of cloud computing, storage and networking resources - all via one, unified application programming interface (API). The benefits could include significantly simplified configuration, management and scaling of large-scale enterprise infrastructures through integration and automation.

That's a new role for OpenFlow, demanding strategic tailoring of the protocol for the optical transport domain. Demonstration and development of the capability are closely watched by enterprises that are under incessant pressure to cost-effectively meet ever-increasing demand for bandwidth and services.

Virtualization's New Frontier
Servers and storage have been virtualized in the enterprise; the next great frontier for virtualization is the network.

Because of the substantial cost savings and performance benefits that it can deliver, SDN-based virtualization is of prime interest to enterprises for a wide range of applications. OpenFlow has emerged as one of the most popular SDN protocols. Web 2.0 network operators and national research and education network (NREN) operators, especially, like OpenFlow.

With OpenFlow, an abstraction of the network's packet switches can be generated and flow-forwarding behavior can be specified across an infrastructure via an external controller. Operations can be substantially automated and streamlined by breaking up the monolithically integrated control and forwarding paradigm of today's switches.

Using OpenFlow, could SDN be extended across layers and create a scenario in which - with a single instruction - the controller could jointly create virtual machines and enable enterprise network administrators to reserve computing, networking and storage resources in one stroke?

It is an obviously compelling notion for enterprise network staffs who desperately need to simplify operations. However, the problem is OpenFlow deployment and development has largely been limited to the electrical packet layer, whereas the interconnection beyond the data center is typically comprised of optical transport technology. Furthermore, the optical domain is where things get hazy for many enterprise network administrators. Their comfort zone tends to be packets - not wavelengths and optics.

The result is that cloud computing is currently decoupled from the transport networking control and operation. The network exists as a static, separated entity in today's cloud implementations. There is no interaction between cloud computing processes and the statically configured network. The two are not in any way interoperable; they speak different languages.

Converging cloud computing and networking requires a more dynamic mode of control and operation, but enterprises largely have judged integrating management of the optical network into the data-center environment to be too complex.

To extend OpenFlow from its established role in the electrical packet domain to the optical layer (and, thereby, extend SDN across multiple network layers), a range of optical-specific concerns must be tackled.

Crafting and Experimenting
Within the European Commission's FP7 ICT Work Programme is a collaborative project, "OpenFlow in Europe - Linking Infrastructure and Applications" (OFELIA), that provides researchers with a test bed in which to experiment with SDN applications and virtual multi-layer networks over shared network infrastructure.

Via standardized, secure interfaces through GÉANT, a high-bandwidth interconnection of European R&E networks, researchers develop, run and control experiments using packet switches and application servers at the University of Essex and seven other test-bed facilities throughout Europe.

OFELIA hosts a prototype implementation of dynamic control of wavelength-switched optical networks via OpenFlow. Bandwidth, latency and power consumption can be adjusted to meet the specific requirements of specific applications.

To make it happen, key OpenFlow additions had to be engineered in order for the protocol to effectively control the optical domain. Optical-specific considerations were required to adapt OpenFlow from the packet world. A packet can travel from any ingress to any egress port in an electrical switch or from any time slot in a time-division multiplexing (TDM) device. The optical domain, however, introduces strict switching constraints, with regard to wavelength continuity, optical impairments, optical power leveling on the line side, etc.

Augmenting OpenFlow to address those optical-specific concerns has resulted in an OFELIA prototype that demonstrates a truly transparent, wavelength-switched optical network. The research community is able to experiment with the capability via a flexible, Web-services approach; commercial enterprises, too, are interested in trialing the capability for their specific applications and environments.

OpenFlow is not sufficient in itself to enable the complete transformation that enterprise network administrators envision, to SDN-enable virtualization across all layers of their infrastructures. The additions to OpenFlow that were engineered for the OFELIA test bed provide only the bridge between the optical layer and packet layer and allow integration into a cloud operating system such as OpenStack.

But that is one very important bridge, and the promise for enterprise network administrators is considerable. The OpenFlow innovation could seamlessly integrate the optical transport network under a common management umbrella with an enterprise's routers and switches - all via one familiar interface. Management of the optical domain could become as simple as the management of Ethernet boxes - using an encapsulation of virtual resources that enterprise network administrators could manage via typical and familiar infrastructure. That's a significant breakthrough. With many enterprises already considering usage of an OpenFlow-based control for their packet networks, extending the framework to the wavelength-switched optical layer would be a natural migration.

Virtualization has developed over phases in enterprise networking. First, resource virtualization inside data centers delivered economic savings through enhanced utilization, scalability and redundancy. Data-center virtualization conveyed greater infrastructure flexibility, higher availability and better workload balancing. The next frontier, network virtualization, promises true platform agility and, with it, a host of long-sought-after enterprise capabilities: capacity on-demand, adaptive infrastructure and dynamic service automation, among them. Adapting OpenFlow and extending SDN to the optical transport domain comprise an important step toward that vision.

More Stories By Jörg-Peter Elbers

Jörg-Peter Elbers is VP Advanced Technology in the CTO office at ADVA Optical Networking in Munich, Germany, and is globally responsible for technology strategy, new product concepts, standardization, and research activities.

Prior to joining ADVA in 2007, he was Director of Technology in the Optical Product Unit of Marconi (now Ericsson). From 1999 to 2001, he worked at Siemens AG, last as Director of Network Architecture in Siemens Optical Networks.

More Stories By Achim Autenrieth

Achim Autenrieth is Principle Research Engineer Advanced Technology in the CTO Office at ADVA Optical Networking, where he is working on the design and evaluation of multilayer networks, control plane, and SDN concepts. Achim is a member of IEEE and VDE/ITG, he authored or co-authored more than 70 reviewed and invited scientific publications and he is technical program committee member of ECOC, DRCN, and RNDM.

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.


@BigDataExpo Stories
SYS-CON Events announced today that Elastifile will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Elastifile Cloud File System (ECFS) is software-defined data infrastructure designed for seamless and efficient management of dynamic workloads across heterogeneous environments. Elastifile provides the architecture needed to optimize your hybrid cloud environment, by facilitating efficient...
SYS-CON Events announced today that Grape Up will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct. 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Grape Up is a software company specializing 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 across the U.S. and Europe, Grape Up works with a variety of customers from emergi...
SYS-CON Events announced today that Grape Up will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct. 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Grape Up is a software company specializing 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 across the U.S. and Europe, Grape Up works with a variety of customers from emergi...
SYS-CON Events announced today that Golden Gate University will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Since 1901, non-profit Golden Gate University (GGU) has been helping adults achieve their professional goals by providing high quality, practice-based undergraduate and graduate educational programs in law, taxation, business and related professions. Many of its courses are taug...
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...
With Cloud Foundry you can easily deploy and use apps utilizing websocket technology, but not everybody realizes that scaling them out is not that trivial. In his session at 21st Cloud Expo, Roman Swoszowski, CTO and VP, Cloud Foundry Services, at Grape Up, will show you an example of how to deal with this issue. He will demonstrate a cloud-native Spring Boot app running in Cloud Foundry and communicating with clients over websocket protocol that can be easily scaled horizontally and coordinate...
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...
Connecting to major cloud service providers is becoming central to doing business. But your cloud provider’s performance is only as good as your connectivity solution. Massive Networks will place you in the driver's seat by exposing how you can extend your LAN from any location to include any cloud platform through an advanced high-performance connection that is secure and dedicated to your business-critical data. In his session at 21st Cloud Expo, Paul Mako, CEO & CIO of Massive Networks, wil...
Any startup has to have a clear go –to-market strategy from the beginning. Similarly, any data science project has to have a go to production strategy from its first days, so it could go beyond proof-of-concept. Machine learning and artificial intelligence in production would result in hundreds of training pipelines and machine learning models that are continuously revised by teams of data scientists and seamlessly connected with web applications for tenants and users.
When shopping for a new data processing platform for IoT solutions, many development teams want to be able to test-drive options before making a choice. Yet when evaluating an IoT solution, it’s simply not feasible to do so at scale with physical devices. Building a sensor simulator is the next best choice; however, generating a realistic simulation at very high TPS with ease of configurability is a formidable challenge. When dealing with multiple application or transport protocols, you would be...
IT organizations are moving to the cloud in hopes to approve efficiency, increase agility and save money. Migrating workloads might seem like a simple task, but what many businesses don’t realize is that application migration criteria differs across organizations, making it difficult for architects to arrive at an accurate TCO number. In his session at 21st Cloud Expo, Joe Kinsella, CTO of CloudHealth Technologies, will offer a systematic approach to understanding the TCO of a cloud application...
SYS-CON Events announced today that Secure Channels, a cybersecurity firm, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Secure Channels, Inc. offers several products and solutions to its many clients, helping them protect critical data from being compromised and access to computer networks from the unauthorized. The company develops comprehensive data encryption security strategie...
"With Digital Experience Monitoring what used to be a simple visit to a web page has exploded into app on phones, data from social media feeds, competitive benchmarking - these are all components that are only available because of some type of digital asset," explained Leo Vasiliou, Director of Web Performance Engineering at Catchpoint Systems, 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.
SYS-CON Events announced today that App2Cloud will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct. 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. App2Cloud is an online Platform, specializing in migrating legacy applications to any Cloud Providers (AWS, Azure, Google Cloud).
Cloud resources, although available in abundance, are inherently volatile. For transactional computing, like ERP and most enterprise software, this is a challenge as transactional integrity and data fidelity is paramount – making it a challenge to create cloud native applications while relying on RDBMS. In his session at 21st Cloud Expo, Claus Jepsen, Chief Architect and Head of Innovation Labs at Unit4, will explore that in order to create distributed and scalable solutions ensuring high availa...
Internet-of-Things discussions can end up either going down the consumer gadget rabbit hole or focused on the sort of data logging that industrial manufacturers have been doing forever. However, in fact, companies today are already using IoT data both to optimize their operational technology and to improve the experience of customer interactions in novel ways. In his session at @ThingsExpo, Gordon Haff, Red Hat Technology Evangelist, shared examples from a wide range of industries – including en...
Detecting internal user threats in the Big Data eco-system is challenging and cumbersome. Many organizations monitor internal usage of the Big Data eco-system using a set of alerts. This is not a scalable process given the increase in the number of alerts with the accelerating growth in data volume and user base. Organizations are increasingly leveraging machine learning to monitor only those data elements that are sensitive and critical, autonomously establish monitoring policies, and to detect...
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. Jack Norris reviews best practices to show how companies develop, deploy, and dynamically update these applications and how this data-first...
Intelligent Automation is now one of the key business imperatives for CIOs and CISOs impacting all areas of business today. In his session at 21st Cloud Expo, Brian Boeggeman, VP Alliances & Partnerships at Ayehu, will talk about how business value is created and delivered through intelligent automation to today’s enterprises. The open ecosystem platform approach toward Intelligent Automation that Ayehu delivers to the market is core to enabling the creation of the self-driving enterprise.
You know you need the cloud, but you’re hesitant to simply dump everything at Amazon since you know that not all workloads are suitable for cloud. You know that you want the kind of ease of use and scalability that you get with public cloud, but your applications are architected in a way that makes the public cloud a non-starter. You’re looking at private cloud solutions based on hyperconverged infrastructure, but you’re concerned with the limits inherent in those technologies.