F5 Application Layer SDN: Now with Extreme Programmability
"If you look at the standard SDN model, [Layer 4-7 services] are applications that can basically run on the [SDN] controller platform. But that's not the only way to do them. We'll hear about dif...
Published Feb 11, 2013
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Lori_MacVittie
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Bruno_9488
Nimbostratus
Nimbostratuson clarification, quoting John Giacomoni "A first step is to create a clear distinction between SDN Fabric-based technologies and those operating at the Application Services Layer (L7+)."
On distributed processing: the problem described in the post is if a switch does not have the intelligence to process application level traffic, it punts it to the controller and "... as an unintended consequence, the OpenFlow Controller has become a critical part of the data path – a job it was not designed to handle".
Absolutely true, but the fact the end point lacks intelligence to process the information is just bad design, not a problem with the model which calls for distributed processing.