Solutions built this way are expensive from a hardware design perspective, especially when we scale up the network topologies and the number of flow entries which need to be supported. OpenFlow v1.0 has actually been used in commercial networks for a while, and for various reasons including lack of open platforms at initial release time, relies on a single table model based on Ternary Content Addressable Memory (TCAM) or ASICs. For the control plane to communicate with the data plane some mechanism or protocol is required and so far, OpenFlow has been the defacto mechanism employed by most developers and manufacturers. This is done by decoupling the system that makes decisions about where traffic is sent (the control plane) from the underlying systems that forward traffic to the selected destination (the data plane). SDN fundamentally allows network administrators to manage network services through abstraction of lower level functionality.
TOR SWITCH CONTAINS VM ENTRIES SOFTWARE
Everyone is talking about Software Defined Networking (SDN) along with Network Functions Virtualization (NFV) and these are what are fuelling all the innovation. Isn’t innovation in today’s network accelerating at such an exciting and incredible pace? Much of the work so far has beeen focused on data center traffic engineering with emerging use cases evolving very quickly now in service provider networks.
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