A Routing Algorithm with Sdn Controller Using Policy-Based Routing (PBR)

Software defined networking (SDN) is a modern computer network architecture in which the control plane is separated from the data plane and applied centrally. SDN use in businesses necessitates the replacement of legacy network infrastructure, which comes at a high cost to the business. The phased rollout of SDN in the form of hybrid networks is the solution to this issue. Legacy devices' control planes must communicate with the SDN controller in hybrid networks. This connectivity facilitates the use of SDN in hybrid networks. Policy-based routing (PBR) is a mechanism in legacy networks that makes routing decisions based on policies set by network administrators and offers a versatile routing mechanism. Using an SDN controller and the Open Flow protocol, we presented a new approach for policy-based routing (PBR) in RIP-based hybrid networks in this article. The Open Flow switches send false metrics advertising packets to the legacy routers using this tool. We may alter the routing table of a legacy router using this procedure, which is dependent on the controller's policy.