7. Major Benefits of SDN
Efficient use of resources: Resources in an NVE(Network virtualization environments ) can be efficiently utilized with the help of SDN. SDN has the capability to distribute the workload among the controller, which increase the speed and efficiency.
Efficient network administration: SDN allows the network administrator to change the characteristics of the network remotely. An easy and efficient network management possible by changing the network characteristics based on the arrival of the workload in the network.
Cross Tenant data center optimization: Existing cloud architecture does not support cross tenant functionality. But the SDN can implement in a multitenant environment such as data center and data clouds. The coupled architecture and resource virtualization is well suited for multitenant data center optimization.
Programmability of the network: SDN has the ability to control the entire network programmatically.
SDN facilitate not to deploy custom policies and protocols on each device separately in a network. Programmability is possible on the control plane itself,through which the behavior of the specific device or whole network can be changed. The controller can enhance the traffic engineering capabilities and reduces the congestion in the network.
Virtual and physical network management: Network virtualization is the process of providing network resources to end users through virtual network collection resources from multiple Infrastructure Providers.
Virtual network is the collection of virtual link and nodes on the underlying physical network. SDN has the ability to manage both physical and virtual network by using a central management tool.
Reduced cost: Most of the SDN products are open source. Some products like VMwares NSX, Microsofts Hyper V network virtualization required to pay only the license fee for the SDN solution. On the other hand since SDN support upto layer-3 , no need to purchase expensive hardware by the enterprise which reduces the CAPEX.
Centralized network management: SDN allows a centralized view of the entire network status that makes easier to the network administrator to manage the network device efficiently.
Enhanced security: In a virtualized environment, providing security to the VM is a very difficult task. But SDN provides a fine-grained security to the end devices.
Utilizing SDN network, allows Separation of the control and data plans, which provides several additional benefits:
- Free's up processing power
- Improves packet and frame traffic
- Optimised network performance
- Simplifies devices and elements
One of the most compelling benefits of SDN is Automation.
Using SDN combined with automation makes it possible to program the network via API's, providing further benefits:
- Unprecedented levels of efficiency
- Helps users meet SLAS
- OpeX available for immediate cost savings
- Frees IT staff to focus important/ strategic tasks
Ultimately, SDN enables any organization to virtualise their entire network.
Applications of SDN: SDN can be used to improve network management by eliminating middle boxes and carry out flexible network configuration changes in in enterprise and data centre networks, telecommunications and Internet service provider (ISP) networks. SDN can also be deployed in backbone networks.