& cplSiteName &

SDN's Pragmatic Side

Craig Matsumoto

3:35 PM -- LAS VEGAS -- Telco TV 2012 -- As much as we like to equate software-defined networking (SDN) with programmability, it's got some simpler use cases related to the basics of carrier operations.

I moderated a TelcoTV panel Thursday that included two rural carriers, Great Plains Communications Inc. and TDS Telecom , both of which are interested in SDN for things like recovering from fiber cuts or tracking VLAN performance.

It's a very optical-layer point of view, one that I'm sure doesn't match some definitions of SDN. Think of it as a formative, primordial-soup version of SDN, a perspective on what the stuff can do now, without waiting for the Internet Engineering Task Force (IETF) and other standards groups to nail down their SDN specifics. (See also: the Verizon Communications Inc. (NYSE: VZ) setup for traffic management.)

VLANs, for example, don't typically have a redundant backup, so it's great to be able to automatically reroute them in software, said John Greene, Great Plains' chief network engineer. His organization has had that happen several times after fiber cuts.

I didn't ask how often fiber cuts happen. But considering Great Plains' network spans Nebraska, it's probably not that convenient to drive out to a site to fix anything. The more they can do in software, the better. Along similar lines, Greene sees SDN being useful at the intersections between optical networks.

TDS hasn't begun working with anything it calls SDN yet, but Ken Paker, vice president of network services, sees a lot of promise in using it to simplify network management. Carriers' internal use cases will emerge first, which will give them the comfort level to use SDN aggressively as customers' use cases start to emerge, he said.

Paker also made the point that SDN reflects the direction that a carrier's operations should be heading in. Tasks such as provisioning are moving closer to being IT functions rather than cables-and-engineering work. (TDS's CEO, Dave Wittwer, brought up the same point during his Friday keynote.) It sounds a lot like the theme of Bridging the Chasm that Light Reading has been tracking.

SDN wasn't a huge topic at TelcoTV, a reflection of attendees' priorities. Small telcos aren't thinking about things like security-layer programmability. But it's good to know that the concepts behind SDN are already doing somebody some good.

— Craig Matsumoto, Managing Editor, Light Reading

(1)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
12/5/2012 | 5:18:34 PM
re: SDN's Pragmatic Side

Hi Craig,

Good thoughts from Great Plains and TDS. However, what they seem to be referring to is having automated network management to help with restoration/re-routing and VLAN programming.

Now, I'm sure under some defintion of SDN this could certainly be classified that way, but it seems plain and simple smart network management to me. Some of the topics we just finished discussing earlier this week at our live panel on network performance management at NANOG56, which is part of our initiative on Provider Network Health Assessment http://bit.ly/QFrnaQ



More Blogs from Craig's A-List
If there isn't a master plan behind Google's creation of Kubernetes, maybe there ought to be.
Already replaced as CEO, John Chambers is fully detaching as he plans to step down as Cisco chairman, truly ending his time as the face and voice of the company.
The network must be automated. And Light Reading must write about it.
Comcast joins Google in asking for a flexible-rate optical standard, rather than 400G or terabit, but that's easier said than done
Cisco, Juniper and other more traditional Interop speakers might get overshadowed by the forces of virtualization
Featured Video
Upcoming Live Events
October 22, 2019, Los Angeles, CA
November 5, 2019, London, England
November 7, 2019, London, UK
November 14, 2019, Maritim Hotel, Berlin
December 3-5, 2019, Vienna, Austria
December 3, 2019, New York, New York
March 16-18, 2020, Embassy Suites, Denver, Colorado
May 18-20, 2020, Irving Convention Center, Dallas, TX
All Upcoming Live Events