Hi Mates. Once again, I give a very warm welcome to the SDN Course.
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CHARACTERISTICS OF THE SDN CONTROLLER
Characteristics.
· There are three main characteristics of SDN controller.
1. Separation of Forwarding Plane an Control Plane
The separation of control plane and forwarding plane is one of fundamental of SDN.
Ø The control plane establishes the local data set used to create the forwarding table entries, which are in turn used by the data planes to forward the traffic between ingress and egress ports on a device.
Ø The data set used to store the network topology is called the routing information base (RIB).
Ø The RIB is often kept consistent (i.e. Loop free) through exchange of information between other instances of control planes within the network.
Ø Forwarding table entries are commonly called as forwarding information base (FIB) and are often mirrored between the control and data planes of a typical devices.
Ø The FIB is programmed once the RIB is deemed consistent and stable.
2. Centralized Network Aproach
In a typical SDN, the network intelligence is logically centralized in controllers (software-based), which enables the control logic to be designed and operated on a global network view, as a centralized application, rather than a distributed system.
3. Open Interfaces.
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