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OpenFlow News

Archive for October, 2009

GENI announces $10.5m in NSF funding for large-scale prototypes

October 26th, 2009, Guido Appenzeller in OpenFlow Blog

chipelliotBBN Technologies today announced $10.5 million in NSF funding for large-scale prototype deployments of new networking technologies (Full Press Release). It is exciting to see a first generation of GENI research move from the laboratory to live networks across the continent.

Currently negotiations for on scope and amounts for the individual projects are ongoing and nothing is final yet. That being said the current plans are for a substantial part of the funding to be used in OpenFlow deployments at a number of universities and backbone networks. Schools previously mentioned as participating include Princeton, Rutgers, Clemson, Wisconsin, Indiana, Georgia Tech and University of Washington with NLR and Internet2 connecting them. A number of networking hardware vendors have committed to providing OpenFlow enabled switches and routers for the deployments. We’ll update you on the details as they are being announced.

In the men time congratulations and thanks to Chip Elliot (pictured to the right) and his team at the GPO for having taken another major step to move the GENI vision forward.

Workshop Presentations

October 20th, 2009, Guido Appenzeller in OpenFlow Blog

The presentations from the OpenFlow Workshop in August 2009 are now online:

MS Thesis on OpenFlow Software Switch Performance

October 18th, 2009, srini in OpenFlow Blog


Manuel Palacin from the University Politecnico di Torino (Italy) and the Technical University of Catalonia-UPC (Spain) recently completed a thesis on “OpenFlow Switching Performance“. The thesis presents an interesting performance evaluation of the OpenFlow reference implementation (ver 0.8.9_rev2), and compares it against that achieved by Linux Routing (ip_forwarding) and Bridging (bridge tools). Using an Agilent tester for generating packets with different MAC address, IP addresses and UDP port numbers, Manuel measured the latency and throughput achieved by the three software switching schemes.


FlowVisor Tech Report and New Version Released

October 15th, 2009, capveg in Announcements, OpenFlow Blog

FlowVisor is a network virtualization layer built on top of OpenFlow.  The FlowVisor allows a single physical network to be sliced into multiple logical OpenFlow networks, allowing researchers to run multiple OpenFlow controllers on the same set of devices.  The technical report details the FlowVisor’s design and slicing mechanisms as well as an evaluation of how well the FlowVisor enforces isolation between slices.

The features described in the tech report have been included in the newly released FlowVisor version 0.4, including:

* preliminary bandwidth isolation between slices

* improved OpenFlow message rate limting for switch CPU isolation

* per-slice virtual topologies

Both the technical report and the new version are available from the FlowVisor’s webpage:

Enterprise GENI featured

October 5th, 2009, Guido Appenzeller in OpenFlow Blog

Enterprise GENI, the OpenFlow based Network Substrate that is part of the large-scale GENI effort funded is featured on the GENI home page today. GENI uses the FlowVisor with an added-on Aggregate Manager to virtualize a network. Recently at Stanford we demonstrated how to use eGENI together with PlanetLab, allowing control of both computing and network infrastructure through a single framework. For more information, have a look at the article.

OpenFlow on NEC

October 2nd, 2009, dtalayco in OpenFlow Blog

necNEC switches have been supporting OpenFlow since the earliest  deployment on an experimental network here at Stanford.  This started with prototype development in November of 2008 and a more complete deployment started in April of 2009.   NEC provided the first hardware accelerated OpenFlow switch and hence arguably has one of the most mature OpenFlow implementations.

NEC_IP8800_48port Two types of switches from the IP8800 series — the IP8800/S3640-24T2XW and the IP8800/S3640-48T2XW — are currently deployed including both 24 and 48 port GE switches, each with 2 10-gigabit ports.   A total of five switches are used in the immediate OpenFlow deployment here in the Gates building on Stanford’s campus.

topo-thumbVLANs have been deployed on the switches to differentiate between OpenFlow and non-OpenFlow traffic.  Within the OpenFlow category, both “production” and “experimental” networks are configured.  The OpenFlow production network serves many researchers with normal network connectivity providing email, web and the usual network resources.  The experimental networks provide segmented access to such projects as OpenPipes (PDF) and OpenRoads (PDF) with development and demos running continuously.

The NEC switches support multiple virtual OpenFlow instances to be running on a physical switch, each with its own quota of flows.  The switch hardware accelerates:

  • Matching on the full OpenFlow 10-tuple.
  • The L2 MAC destination address rewrite action.
  • Forwarding to multiple output ports (multicasting).

The NEC switches have provided a stable platform carrying a large part of our local traffic.  NEC has been very effective at ensuring that their switches support the latest OpenFlow specifications.