ABSTRACT
This paper proposes a Quality-of-Service-aware Traffic Rerouting method for failure detection and recovery in OpenFlow-based Software-Defined Networks. Due to the delay in reactive failure recovery, this work uses a proactive failure recovery mechanism in which backup paths are pre-computed. In case of failure, these alternate backup paths are used to reroute the traffic. As these backup paths are also computed by the controller, they can be used for automatic recovery without the additional delay in controller intervention and it aids in rapid recovery. As today’s Internet real-time applications like video conferencing, Voice-over IP, distance learning and online interactive gaming necessitate Quality of Service, this work aims to address this also. In order to provide Quality of Service, the controller considers minimum delay and bandwidth requirements of text and video applications while computing working and alternate backup paths. Emulations declare that this work showed better performances in terms of average end-to-end delay, recovery time and packet loss ratio.
