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- W2041849649 abstract "OpenFlow, initially launched as a technology-enabling network and application experimentation in a campus network, has a disruptive potential in designing a flexible network, fostering innovation, reducing complexity and delivering the right economics. This paper focuses on fault tolerance of OpenFlow to deploy it in carrier-grade networks. The carrier-grade network has a strict requirement that the network should recover from the failure within a 50ms interval. We apply two well-known recovery mechanisms to OpenFlow networks: restoration and protection, and run extensive emulation experiments. In OpenFlow, the controlling software is moved to one or more hardware modules (controllers) which can control many switches. For fast failure recovery, the controller must notify all the affected switches about the recovery action within ms interval. This leads to a significant load on the controller. We show that OpenFlow may not be able to achieve failure recovery within a 50ms interval in this situation. We add the recovery action in the switches themselves so that the switches can do recovery without contacting the controller. We show that this approach can achieve recovery within 50ms in a large-scale network serving many flows." @default.
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- W2041849649 date "2013-03-01" @default.
- W2041849649 modified "2023-10-16" @default.
- W2041849649 title "OpenFlow: Meeting carrier-grade recovery requirements" @default.
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- W2041849649 doi "https://doi.org/10.1016/j.comcom.2012.09.011" @default.
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