Redundancy Control using software defined networking

We present a technique of providing resiliency in a computer network which some mission-critical applications require. The technique involves the use of redundancy through packet duplication and transmission over multiple disjoint paths between a pair of nodes in a network. To create a general-purpose resiliency system, we introduce a new network element, a Redundancy Controller (RC) that establishes and maintains the redundancy end hosts request. An RC also monitors path performance and replaces poorly performing paths. End users are able to specify criteria required for the performance of paths. The paper reports on work in progress. It outlines the motivation behind the project and describes our implementation plan.