Flow Table Space Management And Energy Efficiency Issues In Hybrid Software Defined Network

Abstract

Abstract newlineIn the last few years, a large number of internet users have generated a huge amount newlineof data in the network. This high amount of data also put a burden on the networking newlinedevices. In traditional networking devices, the control plane (logic for forwarding newlinepackets) and data plane (actual forwarding element) are bundled together in a single box newlinethrough tightly coupled manner. Such networking systems are not flexible in the design newlineand configuration. The Software-defined networking (SDN) is a networking scenario newlinewhich changes the traditional network architecture by bringing all control functionalities newlineto a single location and making centralized decisions. Now, the control planes are newlinedecoupled from the data planes which provide easy configuration and maintenance of newlinethe devices. newlineSince evolution, SDN is moving towards the major changes in the networking scenario. newlineHowever, due to some limitation of devices and protocol specifications, the changes newlineoccurring in the technology is not up to the mark as expected in a real-time manner. newlineOne of the major concern related to the SDN devices is their limited amount of storage newlineto hold the flow entries. This limited storage often leads to the bounded scope of the newlineSDN technique. The first module focuses on a hybrid SDN network design which gains newlinethe advantage of both SDN and traditional networking technology in an incremental newlinemanner. This approach uses the free IP address available in the destination subnet to newlineroute the all packet (destined towards the same subnet). As, in the customer-service newlineprovider network, the edge devices need to perform the additional activity as compared newlineto the core devices. So, the edge devices are configured with SDN functionality and the newlinecore devices are retained in a traditional manner. A mapping and un-mapping activity newlineis performed on the edge devices to convert the actual destination address into the one newlineof free IP address and vice versa. The impact of this approach can be seen on the newlinedevice storage as the number of flow entries are now reduced at