Hybrid OpenFlow ECMP testbed
SDN fabric controller for commodity data center switches describes how the real-time visibility and hybrid control capabilities of commodity data center switches can be used to automatically adapt the network to changing traffic patterns and optimize performance. The article identifies hybrid OpenFlow as a critical component of the solution, allowing SDN to be combined with proven distributed routing protocols (e.g. BGP, ISIS, OSPF, etc) to deliver scaleable, production ready solutions that fully leverage the capabilities of commodity hardware.
This article will take the example of large flow marking that has been demonstrated using physical switches and show how Mininet can be used to emulate hybrid control of data center networks and deliver realistic results.
The article Elephant Detection in Virtual Switches & Mitigation in Hardware describes a demonstration by VMware and Cumulus Networks that shows how real-time detection and marking of large "Elephant" flows can dramatically improve application response time for small latency sensitive "Mouse" flows without impacting the throughput of the Elephants - see Marking large flows for additional background.
Performance optimizing hybrid OpenFlow controller demonstrated how hybrid OpenFlow can be used to mark Elephant flows on a top of rack switch. However, building test networks with physical Continue reading