What is SDN (Software-defined networking) & How SDN works?
What is SDN? The physical separation of the network control plane from the forwarding plane, and where a control plane controls several devices.
What is SDN?
It is a centralized approach wherein, there is a physical separation of the management plane, control plane, and data forwarding plane of the network. The control plane controls several devices.
Management Plane
Control Plane
Forwarding Plane
Why Do We Need SDN?
Saves huge costs, compared to traditional Networks in terms of hardware upgrades.
Enables network programmability.
Network Components are centrally managed unlike the localized management of traditional Networks.x
Can also work by being Vendor Neutral instead of relying on vendor-specific devices and protocols.
DIRECTLY PROGRAMMABLE
Network control is directly programmable because it is decoupled from forwarding functions. Abstracting control from forwarding lets administrators dynamically adjust network-wide traffic flow to meet changing needs.
CENTRALLY MANAGED
Network intelligence is (logically) centralized in software-based SDN controllers that maintain a global view of the network, which appears to applications and policy engines as a single, logical switch.
SDN lets network managers configure, manage, secure, and optimize network resources very quickly via dynamic, automated SDN programs, which they can write themselves because the programs do not depend on proprietary software.
OPEN STANDARDS-BASED AND VENDOR-NEUTRAL
When implemented through open standards, SDN simplifies network design and operation because instructions are provided by controllers instead of multiple, vendor-specific devices and protocols.
Enterprises, carriers, and service providers are being surrounded by a number of competing forces. The monumental growth in multimedia content, the explosion of cloud computing, the impact of increasing mobile usage, and continuing business pressures to reduce costs while revenues remain flat are all converging to wreak havoc on traditional business models.
To keep pace, many of these players are turning the technology to revolutionize network design and operations.
SDN enables the programming of network behavior in a centrally controlled manner through software applications using open APIs. By opening up traditionally closed network platforms and implementing a common control layer, operators can manage the entire network and its devices consistently, regardless of the complexity of the underlying network technology.
0 Comments