A scheme for resilient routing in residue number system based software defined networks

Abstract

In recent times, the advances in internet technology and the rise of network traffic, owing to relentless creation of rigorous and mission-critical applications, has been giving serious attention to resilient routing in Software Defined Network (SDN). The evolution has made it possible for extensive use of SDN to respond to the current requirements of modern networking. Residue Number System (RNS) has been used to minimize latency in routing tables for Openflow protocol. However, majority of network elements remain vulnerable to failures, especially transmission devices and links. It has been shown that proactive approaches to link recovery in RNS based SDN can select alternate path during link failures, however, the challenges of fast failure recovery still exist with large data path labels for both primary and alternate routes. Furthermore, the problem of early backup path failure before primary path still remains a challenge. The paper presents an approach that is intended to improve SDN routing and reduce the computational in RNS based SDN. The proposed scheme utilizes the shortest path re-route algorithm and a reactive mechanism to respond to link failure when it occurs. The proposed scheme which will be implemented as a prototype using the mininet emulator and floodlight controller is intended to effectively route packets especially when there are link failures for RNS based SDN.