As seen earlier, traditional networks are built and operated based on the three networking planes. The networks were static in nature and were manually configured based on service requests. Let's now see what challenges are faced in the traditional architecture of networks.
The most obvious problem faced in control plane is that of interoperability. While standards exist for most protocols, each vendor's support for the standards may vary. And even for the same vendor the protocol behavior could differ between releases. This will lead to incompatibility and limit the intelligence that can be built using control plane. For cost optimization as well as flexibility, cloud operators do not want single-vendor lock in. Therefore, it is very important that the control plane is feature rich and robust for the entire cloud.
Another problem faced by control plane is that of scale. We have seen that control plane entities (protocols and...