Dynamic Flow Reduction Scheme Using Two Tags Multi protocol Label Switching (MPLS) in Software Define Network

Software-Defined Networking (SDN) is a technique that breaks the vertical integration of networks by separating the networks' control logic from the underlying routers and switches that forward the traffic. The performance of SDN network nodes may be degraded due to flow entries that are frequently updated and stored in the network elements. The control plane is flooded by the configuration messages thereby resulting in a trade-off between the number of configuration messages and number of permanent flow entries in the network.The focus of the study is to develop a scheme that will reduce the number of flow entries of IPv6 packets using two multiprotocol label switching tags in Software Defined Networks. An experimental testbed was developed using openvswitch, Ryu controller, OpenFlow version 1.3, IPERF3 and Wireshark. A Mininet kernel was built on Ubuntu Linux 18.04.1 operating system. The IPv6 Hybrid Permanent Flow (HPF) scheme and Non-Permanent Flow (NPF) was used to reduce the number of permanent flow entries and the number of configuration messages from the controller to the Ternary Content Addressable Memory (TCAM) of the Openswitch.The Result shows that IPv6 HPF scheme had a reduction of 63% as against NPF in the network for the dependency of switch per region while 33% reduction in flow entries of the network for the dependency of host per switch. The result can be used by Internet Service Providers (ISPs) for real-time network flow that will provide handling of an unpredictable surge of big-data transmission across network backbone.