A clean slate 4D approach to network control and management
ACM SIGCOMM Computer Communication Review
Ethane: taking control of the enterprise
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
OpenFlow: enabling innovation in campus networks
ACM SIGCOMM Computer Communication Review
NOX: towards an operating system for networks
ACM SIGCOMM Computer Communication Review
HyperFlow: a distributed control plane for OpenFlow
INM/WREN'10 Proceedings of the 2010 internet network management conference on Research on enterprise networking
A network in a laptop: rapid prototyping for software-defined networks
Hotnets-IX Proceedings of the 9th ACM SIGCOMM Workshop on Hot Topics in Networks
Network traffic characteristics of data centers in the wild
IMC '10 Proceedings of the 10th ACM SIGCOMM conference on Internet measurement
Onix: a distributed control platform for large-scale production networks
OSDI'10 Proceedings of the 9th USENIX conference on Operating systems design and implementation
On controller performance in software-defined networks
Hot-ICE'12 Proceedings of the 2nd USENIX conference on Hot Topics in Management of Internet, Cloud, and Enterprise Networks and Services
Logically centralized?: state distribution trade-offs in software defined networks
Proceedings of the first workshop on Hot topics in software defined networks
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Distributed controllers have been proposed for Software Defined Networking to address the issues of scalability and reliability that a centralized controller suffers from. One key limitation of the distributed controllers is that the mapping between a switch and a controller is statically configured, which may result in uneven load distribution among the controllers. To address this problem, we propose ElastiCon, an elastic distributed controller architecture in which the controller pool is dynamically grown or shrunk according to traffic conditions and the load is dynamically shifted across controllers. We propose a novel switch migration protocol for enabling such load shifting, which conforms with the Openflow standard. We also build a prototype to demonstrate the efficacy of our design.