Hewlett-Packard Development Company, L.p.

Hewlett Packard Enterprise Development LP

Anna Fischer

Patrick Goldsack

Aled Justin Edwards

Jeffrey Clifford Mogul

Chris I Dalton

Praveen Yalagandula

Jayaram Mudigonda

Bryan E Stiekes

Bryan Stiekes

A scalable, multi-tenant network architecture for a virtualized datacenter is provided. The network architecture includes a network having a plurality of servers connected to a plurality of switches. The plurality of servers hosts a plurality of virtual interfaces for a plurality of tenants. A configuration repository is connected to the network and each server in the plurality of servers has a network agent hosted therein. The network agent encapsulates packets for transmission across the network from a source virtual interface to a destination virtual interface in the plurality of virtual interfaces for a tenant in the plurality of tenants. The packets are encapsulated with information identifying and locating the destination virtual interface, and the information is interpreted by switches connected to the source virtual interface and the destination virtual interface.

Scalable multi-tenant network architecture for virtualized datacenters

A data center can share processing resources using virtual networks. A hosting programhosts one or more virtual machines. The program has a virtual interface VIF, to the virtual machines, a network interfaceto enable communication between the virtual machines and other nodes of a network, and an infrastructure management interface, invisible to the virtual machines. The program has an intercept functionimplemented as a comparator, switch or router, arranged to intercept a status message from one of the virtual machines, or applications run by that virtual machine. The status indication is sent to a status bufferand is made available to the infrastructure management interface without providing a network path between the management interface and the virtual machine. This can discriminate between VM failure and communication failure, and the invisibility maintains isolation and helps avoid vulnerability to denial of service attack.

Virtual machine liveness determination

A data center can share processing resources using virtual networks. A virtual machine manager () hosts one or more virtual machines (), the virtual machines forming part of a segmented virtual network (). Outgoing messages from the virtual machines have an intermediate destination address of an intermediate node in a local segment of the segmented virtual network, and the virtual machine manager has a router () for determining a new intermediate destination address outside the local segment, for routing the given outgoing message. By having the router as part of the virtual machine manager rather than having only a switch in the virtual machine manager, the need for virtual machines for implementing gateways is avoided. This can reduce the number of 'hops' for the message between virtual entities hosted, and thus improve performance. This can help a service provider to share physical processing resources of a data center between different clients having their own virtual networks.

Routing across a virtual network

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Bristol, United Kingdom

Anna Fischer