CALIENT Technologies

Move the light, not the fiber

Q & A: How Real-Time and Scheduled Events Can Drive Network Optimization

Our SDN Central DemoFriday Webinar is Now Online

Earlier this month, we co-hosted an SDN Central DemoFriday webinar with Plexxi Inc. to demonstrate our joint software-defined networking (SDN) driven dynamic packet-optical data center network.

If you weren’t able to catch the show, you can go to the SDNCentral DemoFriday site to view the video and download the accompanying PowerPoint slides.

We discussed how real-time and scheduled events can drive network optimization, and got some great questions.  Here is a summary of the discussion that followed the webinar:

How reliable is the hybrid optical architecture?

Optical rings are inherently reliable because they are built with multiple paths, which means switches can be moved and if there is a cable cut it only affects the directly attached traffic. The 3D-MEMS technology was originally developed for mission-critical applications in carrier and government networks where very high capacity links were in play – such as those at subsea cable landing sites. So the technology was always engineered for very high reliability. More recently, we’ve been driven by requirements for lights-out datacenters and this has pushed even higher reliability.

How rapidly can the connections be changed between the Plexxi switches and the CALIENT switches?

The connections between Plexxi switches can be changed in less than 4 milliseconds, while the CALIENT switch connection setup time is typically 25 milliseconds. Both connection time frames are more than fast enough for applications in the datacenter. It’s important to consider the underlining applications and networks to determine what are the most appropriate connection times in each case.

Can the architecture be extended beyond a single data center?

Yes, and extended data center applications are ideal. The optical circuit switch can be deployed as part of the network within the datacenter – or it can also be setup as part of a reconfigurable add-drop multiplexer node bridging the datacenter and the wide area network – or both. There is tremendous flexibility in handling traffic within or between datacenters, particularly as these networks converge.

For more information, watch the webinar, and then email us or let us know your questions in the comments below and we’ll get those answered as soon as possible.

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