On the ‘net: The background of I2RS

Through this (probably far too long) series on SDNs, we have looked at BGP, Fibbing, and Openflow. BGP and Fibbing would be described as augmented control planes; the distributed control plane is not replaced, but rather augmented with a controller that modifies the best path decisions of the control plane by interacting with the control itself in a somewhat “native” way. Openflow, on the other hand, replaces the distributed control plane; it would actually be difficult to build a system that talks directly to the FIB that does not entirely replace the control plane. But in the original classification, there was a third type of SDN highlighted, a hybrid model. Are there any instances of this sort of model being developed? —ECI Blog