Enhanced Failure Recovery Mechanism Using OpenState Pipeline in SDN

In Software Defined Networking (SDN), link failure situations require switches to make optimized rerouting decisions locally i.e. without controller intervention. However, such optimized rerouting decisions must be made after the link failure situation has been confirmed. The mechanisms that confirm such link failure situations require a certain amount of processing time which may introduce a bottleneck in the performance. This paper proposes an enhanced approach that employs a mechanism to make the rerouting decision without the confirmation of link failure. The approach uses the OpenState Pipeline to manage the network in failure situations, and the experiment results show notable enhancements in packets loss rate and usage of Ternary Content Addressable Memory (TCAM).