Integration of Legacy Non-SDN Optical ROADMs in a Software Defined Network

Abstract : Optical networks are well known to offer high rate bandwidth by sending data over light wavelengths. Those optical networks are composed of fiber optics, amplifiers, reconfigurable optical add drop multiplexer (ROADMs), etc. Nowadays, we wish to manage and monitor that type of networks, especially the ROADMs, flexibly and intelligently by integrating Software Defined Network (SDN) in optical networks. Unfortunately, legacy ROADMs aren't SDN compatible yet. They have all the basic optical functionalities we wish to deploy (offered via the SNMP protocol in our case). However, we aren't always able to update hardware or software in the ROADMs to adapt legacy ROADMs to SDN architecture. The proposed architecture in this article, a proxy that translates OpenFlow messages sent by ONOS into SNMP messages to configure the ROADMs and conversely, is a solution. This solution allows not only to flexibly monitor and manage an optical network via SDN architecture, but also to recover and reroute wavelengths when a link is down. It is also the most adapted solution to legacy networks because it doesn't require any upgrade on the optical network elements.
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Submitted on : Thursday, April 21, 2016 - 4:36:25 PM
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Imad Alawe, Bernard Cousin, Olivier Thorey, Rodolphe Legouable. Integration of Legacy Non-SDN Optical ROADMs in a Software Defined Network. IEEE International Symposium on Software Defined Systems (SDS 2016), Apr 2016, Berlin, Germany. ⟨10.1109/IC2EW.2016.11⟩. ⟨hal-01305734⟩

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