Abstract
The network robustness and reliability are strongly influenced by the implementation of redundancy and its ability of reacting to changes. In situations where packet loss or maximum latency requirements are critical, replication of resources and information may become the optimal technique. To this end, the IEC 62439-3 Parallel Redundancy Protocol (PRP) provides seamless recovery in layer 2 networks by delegating the redundancy management to the end-nodes. In this paper, we present a combination of the Software-Defined Networking (SDN) approach and PRP topologies to establish a higher level of redundancy and thereby, through several active paths provisioned via the OpenFlow protocol, the global reliability is increased, as well as data flows are managed efficiently. Hence, the experiments with multiple failure scenarios, which have been run over the Mininet network emulator, show the improvement in the availability and responsiveness over other traditional technologies based on a single active path.
Highlights
The design of a network requires a robustness study, which is closely related to the use of techniques that minimize service downtime, frame losses, delay, jitter, and, in general, network vulnerabilities that jeopardize the stability of systems
In accordance with the Guidelines for Smart Grid Cyber Security [1] issued by the National Institute of Standards and Technology (NIST): “ the time latency associated with availability can vary, it is generally considered the most critical security requirement.” (b) Industrial Control
The fact is that, despite new insights have expanded the Ethernet standards to be redundant, there are not many options to provide zero loss performance in Local Area Networks (LANs); among them we focus on a solution recently standardized by the International Electrotechnical Commission (IEC): the Parallel Redundancy Protocol (PRP) that, based on the duplication of data and resources, enables a seamless communication in single-failure scenarios
Summary
The design of a network requires a robustness study, which is closely related to the use of techniques that minimize service downtime, frame losses, delay, jitter, and, in general, network vulnerabilities that jeopardize the stability of systems. The network reliability improvement may enable new applications; especially those critical use cases that require minimum latency and loss of information In this sense, we highlight the following environments. In accordance with the Guidelines for Smart Grid Cyber Security [1] issued by the National Institute of Standards and Technology (NIST): “ the time latency associated with availability can vary, it is generally considered the most critical security requirement.” (b) Industrial Control. It is present in factory automation, process industry and motion control.
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