The introduction of SDN in large-scale IP provider networks is still an open issue and different solutions have been suggested so far. In this paper, we propose a hybrid approach that allows the coexistence of traditional IP routing with SDN based forwarding within the same provider domain. The solution is called OSHI-Open Source Hybrid IP/SDN networking, as we have fully implemented it combining and extending open source software. We discuss the OSHI system architecture and the design and implementation of advanced services like pseudo wires and virtual switches. In addition, we describe a set of open source management tools for the emulation of the proposed solution using either the Mininet emulator or distributed physical testbeds. We refer to this suite of tools as Mantoo (management tools). Mantoo includes an extensible Web-based graphical topology designer, which provides different layered network "views" (e.g., from physical links to service relationships among nodes). The suite can validate an input topology, automatically deploy it over a Mininet emulator or a distributed SDN testbed and allows access to emulated nodes by opening consoles in the web GUI. Mantoo provides also tools to evaluate the performance of the deployed nodes. Index Terms-Emulation, network management tools, open source, software defined networking.
The hybrid approach proposed in REF enabled the traditional IP network to work together with SDN-based network within the same service provider.
Hybrid IP/SDN Networking: Open Implementation and Experiment Management Tools
IEEE Transactions on Network and Service Management
IEEE Transactions on Network and Service Management
Computer Science