Virtualization allows isolation between applications and portability of applications over OS and hardware resources. But another main challenge of virtualization is to allow the decoupling of infrastructure providers (who deploy and maintain network equipment) from service providers (who deploy network protocols and offer end-to-end services). This new network virtualization will help the deployment of shared experimental facilities, such as PlanetLab and GENI. Those projects try to build this virtual network that will consist of virtual nodes and links that belong to the same service provider. This panel will try to give an answer to the mains issues behind this new virtual network: 1) How can we use virtualization technology (XEN, VMware, etc.) to build virtual nodes? 2) Why is an old technology like virtual machines suddenly so important again? 3) For what reason to people deploy virtualization technology? 4) How do people deal with the increased number of machines that need to be managed, and patched? 5) After virtualizing networks, machines, operating systems,..., what is the next thing to virtualize? 6) What are the network management functions we need to build and to deploy this new virtual network? 7) What are the issues for the network management community to solve the migration and configuration of those virtual nodes? Chair: Omar Cherkaoui, Universite du Quebec a Montreal, Canada. Panelists: Guy Pujolle, University Paris 6, France, Masum Hasan, Cisco Systems, USA, Giovanni Pacifici, IBM, USA, Rene Schmidt, VMware, USA