AM Nova Southeastern University IP Address: 137.52.76.29 Introduction to OpenFlow Inflexible rules for the processing of flows which uses the LOCAL, FLOOD, and NORMAL reserved ports. Dodging the need to synchronize state or notifications of event between the control planes. The SIN model permits the segregation of the ports by VLANs or logical port and suggested the use of MSTP (Multiple Spanning Tree Protocol) for spanning tree in such an environment. The SIN approach suits well in academic environments where OpenFlow is running simultaneously with the production network. Benefits of Hybrid Model There are many benefits of supporting hybrid mode in SDN controller: It minimizes the complexity and scope of the forwarding decisions made by the controller. All OpenFlow hybrid switches have many root conventional forwarding logic in their ASICs and firmware. The controller will make use of those embedded logics which are available, for routing rather than re- implementing the same logic. SDN's value is in integrating new features to the networks. If all SDN does is centralize the same forwarding decision, then there is no reason for administration to move to SDN (Wackerly, 2014). Figure 8. Architecture of SIN Source: ONF Hybrid SIN WorkGroup. OpenFlow OpenFlow OpenFlow Controller Data Plane Resources On-Board/Le On-Board/Legacy On-Board/Legacy Resources Controller Data Plane Downloaded: 4/15/2022 9:44:49 AM Nova Southeastern University IP Address: 137.52.76.29 Introduction to OpenFlow It reduces traffic of control plane. Since, with the reduced traffic controller has to make forwarding decision for specific packet types/flows, which results in reducing the PACKET_IN messages that are being sent to the controller from the controlled switches. This results in increasing the overall performance of the controller (Wackerly, 2014). It also lowers the obstacle to SDN adoption, because it allows administrators to adopt SDN in different stages, as per requirement. This gradual emigration helps in adoption of SDN and in compl