PRAGMA-ENT: Exposing SDN Concepts to Domain Scientists in the Pacific Rim
Kohei Ichikawa, Mauricio Tsugawa, Jason Haga, Hiroaki Yamanaka,, Te-Lung Liu, Yoshiyuki Kido, Pongsakorn U-Chupala, Che Huang, Chawanat, Nakasan, Jo-Yu Chang, Li-Chi Ku, Whey-Fone Tsai, Susumu Date, Shinji Shimojo,, Philip Papadopoulos, Jose Fortes

TL;DR
PRAGMA-ENT is an international SDN testbed connecting multiple research institutions to facilitate experimentation and development of new networking ideas without affecting production networks.
Contribution
This paper details the establishment of PRAGMA-ENT, an international SDN testbed, and presents innovative control plane solutions like AutoVFlow for multi-controller coexistence.
Findings
Successfully established an international L2 SDN backbone
Evaluated control plane technologies, identifying limitations of FlowVisor
Developed AutoVFlow as a new approach for multi-controller management
Abstract
The Pacific Rim Application and Grid Middleware Assembly (PRAGMA) is an international community of researchers that actively collaborate to address problems and challenges of common interest in eScience. The PRAGMA Experimental Network Testbed (PRAGMA-ENT) was established with the goal of constructing an international software-defined network (SDN) testbed to offer the necessary networking support to the PRAGMA cyberinfrastructure. PRAGMA-ENT is isolated, and PRAGMA researchers have complete freedom to access network resources to develop, experiment, and evaluate new ideas without the concerns of interfering with production networks. In the first phase, PRAGMA-ENT focused on establishing an international L2 backbone. With support from the Florida Lambda Rail (FLR), Internet2, PacificWave, JGN-X, and TWAREN, PRAGMA-ENT backbone connects Open\-Flow-enabled switches at University of…
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