by clicking on the page. A slider will appear, allowing you to adjust your zoom level. Return to the original size by clicking on the page again.
the page around when zoomed in by dragging it.
the zoom using the slider on the top right.
by clicking on the zoomed-in page.
by entering text in the search field and click on "In This Issue" or "All Issues" to search the current issue or the archive of back issues respectively.
by clicking on thumbnails to select pages, and then press the print button.
this publication and page.
displays a table of sections with thumbnails and descriptions.
displays thumbnails of every page in the issue. Click on a page to jump.
allows you to browse through every available issue.
FCW : April 15, 2014
Federal agencies are just beginning to explore the poten- tial of software-de ned networking, and now they have a complementary technology to consider: network functions virtualization. In essence, SDN provides a software layer that seeks to absorb the complexities of network man- agement. The idea is to make networks centrally programmable via software to make them easier to administer and faster to con gure. To date, SDN has had limited impact on the federal space. The Energy Department's Energy Sciences Network (ESnet) and National Science Foundation-funded university projects are among the principal examples of SDN use in government. NFV, which is also just getting under- way, separates network functions such as rewalls, load balancing and intru- sion detection and runs them as virtual machines housed on a generic server. Although NFV differs from the sweep- ing architectural overhaul envisioned for SDN, the two approaches share a common goal: to make networks less complex and costly to manage. Indeed, industry and govern- ment executives view the two technologies as intertwined to a signi cant extent. Why it matters Enterprise networks typically rely on large numbers of specialized devices to handle networking functions, which adds to the expense and logistical challenges of running a network. NFV seeks to reduce the glut of devices by performing those activities via software instead. In other words, network functions once encased in specialized hardware can run on a general-purpose serv- er, said Inder Monga, chief technologist and area lead for network engineering, tools and research for ESnet. The approach has the potential to reduce network costs because it shrinks the device population. Chris Wright, a principal software engineer at Red Hat, said NFV represents a transition for an industry in which network functionality has traditionally been trapped in hard- ware. It virtualizes networking functions and runs them as software in a cloud- like infrastructure. "It is a fairly fundamental architec- tural shift for how you provide your infrastructure as a service," Wright said. As a result, organizations can more readily keep pace with network and cus- tomer demands. They can quickly offer new services or modifying existing ones because the changes are accomplished in software, which is much easier than deploying a new box, he added. Sudhir Verma, chief technology of - cer at IT solutions provider Force 3, said organizations' biggest complaints about providing network services are the time and cost of making changes. "If I go with NFV and start virtualizing some of the aspects of the network management, I can contain costs and support customers in a better way," Verma said, sum- marizing the appeal of the technology. The fundamentals NFV is expected to work in close association with SDN. Both technologies emphasize using software to perform key networking jobs, but they operate at different levels. SDN removes a network's control plane from its usual home in switches and routers and makes it a software NFV: Turning network activities into software BY JOHN MOORE Network functions virtualization promises to save time and money by running components such as rewalls and intrusion detection as virtual machines 30 April 15, 2014 FCW.COM ExecTe c h IfIgowith NFV...I can contain costs and support customers in a better way. SUDHIR VERMA, FORCE 3
March 30, 2014
April 30, 2014