SDN centralizes the network control by separating control logic to off-device computers, requiring you to have a method of communication between the two planes, data and control. With SDN you have a high level of flexibility in terms of dictating switches and routers, and how the forwarding plane handles network traffic and data flow through the network.
Network TAPs play a critical role in the design of a virtual network such as SDN. Visibility is required for both the data plane and control plane. A Network TAP is placed between the ends of the network to pass complete packet copies of traffic flowing between the control and forwarding devices/software.
As bandwidth has increased and applications have become more complex, the reality of SDN has become apparant. In large enterprises with physical connections spread out over a number of remote locations, SDN permits the manipulation of traffic and data flow from a single dashboard.
Ready for SDN End-to-End Visibility? Here are some resources and scenarios we think may be helpful.
- Architecting Data Centers for SDN and NFV
- Securing the Edge in Cisco ACI
- The Controller Problem in SDN
- What is NFV?
- The State of SDN
- How will SDN impact network security?
- The Evolution from Monitoring to SDN
- SDN is Useless without the Proper Connection
- True Cost of SDN
- White-Box and Brite-Box