There are three main factors that impact the reality of data communications: where data is stored, how and from what device data is accessed and the amount of data that’s stored.read more
In 2012 OpenFlow discussions turned into SDN ones. Related although different in significant ways, both OpenFlow and SDN drove a significant level of attention in the networking industry as Nicira’s Acquisition and Cisco’s moves served to establish the commercial value of SDN. In 2013, we are witnessing serious momentum in terms of discussions and start-ups around SDN. However, the questions remain as to which solutions will be successful and which solutions will become available in the market place first?read more
As the industry and the media keep feeding the Software-Defined Networking (SDN) hype and vendors introduce SDN products into the market – it is becoming increasingly important to understand the difference between various offerings as well as the ways in which they can help end users.
The majority of the discussion has centered on changes in forwarding functionality – the functionality of forwarding packets between interconnection ports of networking devices. With OpenFlow (which is not SDN, but is what triggered a lot of the SDN discussion) the intelligence making the forwarding decisions, which lies in the control plane, has moved out of the forwarding platforms that connect the external systems into the network and into the controllers. Here we have decoupled OpenFlow switches and controllers.
About a month ago, I wrote a post on cloud load balancing versus application delivery controllers. In that post, I explored the core differences between cloud-managed load balancing and self-managed commercial load balancing, using an application delivery controller virtual appliance running over cloud infrastructure. In part two of this series, I take a closer look at some of the themes laid out in my earlier post with an emphasis on the role application delivery controllers play in addressing the challenges associated with migrating legacy applications to a general purpose cloud infrastructure.read more