Abstract

Over the last few years, we have seen an increasing interest in wide-area virtual network deployment. To embed virtual networks (VNs) across multiple substrate providers, network virtualization architectures need to address the intricacies of inter-domain aspects, i.e., how to provision VNs with limited control and knowledge of any aspect of the physical infrastructure. In this context, I will present a framework that circumvents the difficulty of VN embedding with limited information disclosure (LID) from substrate network providers. I will further discuss the suboptimality incurred with VN embedding under LID .

A crucial prerequisite for network virtualization is virtual routers with a higher level of programmability than today’s commercial routers. To this end, I will present OpenVRoute, an architecture that satisfies the requirements for router virtualization by combining the advantages of commodity switches and server hardware while mitigating their inherent shortcomings. OpenVRoute employs a split forwarding plane, caching high data-rate flows in an OpenFlow switch while processing low-volume traffic in a software datapath hosted on a server.

Bio: Panagiotis Papadimitriou is an Assistant Professor at the Communications Technology Institute of Leibniz Universität Hannover and a member of the L3S Research Center in Hannover, Germany. He is currently visiting Arjuna Sathiaseelan to work on the Virtual Public Networks project funded by the German Academic Exchange Service Professorial Exchange Programme.

He received a Ph.D. in Electrical and Computer Engineering from Democritus University of Thrace, Greece, in 2008. From 2008 to 2010, Panagiotis was a Post-Doctoral Researcher at the Computing Department of Lancaster University, UK and at Telecom SudParis, France. He participated in several EU-funded (e.g., 4WARD, SAIL ) and national projects (e.g., EPSRC VROUTER , BMBF G-Lab). Panagiotis received the Best Paper Award at IFIP WWIC 2012 and the runner-up Poster Award at ACM SIGCOMM 2009 . His research interests include next-generation Internet architectures, network function virtualization, software-defined networks, and cloud networking.