Date Added: Dec 2012
Network virtualization in cloud computing environment has attracted many attentions recently. With the help of network virtualization, VMM is able to provide fine-grained isolation among different VMs. However, the performance and overhead introduced by network virtualization is also important concerns when applying network virtualization to the cloud computing environment. In this paper, the authors evaluated the security, performance and QoS of popular virtual switch software Open vSwitch. The results can provide several guidelines for cloud application developer and administrators.