Formal requirements for virtualizable third generation architectures
Communications of the ACM
Virtualizing I/O Devices on VMware Workstation's Hosted Virtual Machine Monitor
Proceedings of the General Track: 2002 USENIX Annual Technical Conference
Optimizing the migration of virtual computers
ACM SIGOPS Operating Systems Review - OSDI '02: Proceedings of the 5th symposium on Operating systems design and implementation
Xen and the art of virtualization
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
Dynamic topology adaptation of virtual networks of virtual machines
LCR '04 Proceedings of the 7th workshop on Workshop on languages, compilers, and run-time support for scalable systems
Live migration of virtual machines
NSDI'05 Proceedings of the 2nd conference on Symposium on Networked Systems Design & Implementation - Volume 2
Virtual machine time travel using continuous data protection and checkpointing
ACM SIGOPS Operating Systems Review
virtio: towards a de-facto standard for virtual I/O devices
ACM SIGOPS Operating Systems Review - Research and developments in the Linux kernel
Windows server® 2008 unleashed
Windows server® 2008 unleashed
SnowFlock: rapid virtual machine cloning for cloud computing
Proceedings of the 4th ACM European conference on Computer systems
The origin of the VM/370 time-sharing system
IBM Journal of Research and Development
VIOLIN: virtual internetworking on overlay infrastructure
ISPA'04 Proceedings of the Second international conference on Parallel and Distributed Processing and Applications
Inter-cloud mobility of virtual machines
Proceedings of the 4th Annual International Conference on Systems and Storage
A case for overlays in DCN virtualization
Proceedings of the 3rd Workshop on Data Center - Converged and Virtual Ethernet Switching
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Virtual machines are of very little use if they cannot access the underlying physical network. Virtualizing the network has traditionally been considered a challenge best met by such network-centric measures as VLANs, implemented by switches. We begin by arguing that network virtualization is best done by hypervisors, not switches. We then show that modern hypervisors do a poor job in virtualizing the network, leaking details of the physical network into virtual machines. For example, IP addresses used across the host's physical network, are exposed to guest virtual machines. We then propose a method for plugging the network-related leaks by ensuring that the virtual network traffic is encapsulated inside a host envelope prior to transmission across the underlying physical network. In order to overcome the performance hit related to traffic encapsulation, we analyze the unique case of virtual machine traffic encapsulation, exploring the problems arising from dual networking stacks --- the guest's and the host's. Using a number of simple optimizations, we show how an unmodified guest under the KVM hypervisor can reach throughput of 5.5Gbps for TCP and 6.6Gbps for UDP for encapsulated traffic, compared to 280Mbps and 510Mbps respectively when using the default guest and host networking stacks.