Migrating virtual machines between computing devices

The method of claim 38, wherein receiving the message comprises receiving an Internet control message protocol (ICMP) router advertisement message parameters.

The method of claim 38, wherein the message further includes an indication of a type for the second attachment circuit.

A computing device comprising:

• a network interface;
• and
• a control unit configured to execute a virtual machine using at least some checkpoint data for the virtual machine, after execution of the virtual machine by a separate computing device has stopped, wherein the virtual machine is communicatively coupled to a virtual private network (VPN) via a first attachment circuit using a first set of network parameters while executed by the separate computing device, wherein the control unit is configured to execute the virtual machine and to cause the virtual machine to become communicatively coupled, using the network interface, to the VPN via a second attachment circuit having a second set of network parameters different from the first set of network parameters.

The computing device of claim 39, wherein the message comprises an Internet control message protocol (ICMP) router advertisement message.

The computing device of claim 39, wherein the message further includes an indication of a type for the second attachment circuit.

The computer-readable storage medium of claim 40, wherein the instructions that cause the processor to receive the message comprise instructions that cause the processor to receive an Internet control message protocol (ICMP) router advertisement message.

The computer-readable storage medium of claim 40, wherein the message further includes an indication of the second attachment circuit.

A system comprising:

• a first computing device configured to execute a virtual machine, wherein the virtual machine is communicatively coupled to a virtual private network (VPN) via a first attachment circuit using a first set of network parameters, to stop execution of the virtual machine, and to create checkpoint data for the virtual machine;
• and
• a second computing device configured to execute the virtual machine using at least some of the checkpoint data, and to cause the virtual machine to become communicatively coupled to the VPN via a second attachment circuit using a second set of network parameters different from the first set of network parameters.

The system of claim 41,

• wherein the message comprises an Internet control message protocol (ICMP) message.

The system of claim 41, wherein when the second attachment circuit comprises a virtual local area network (VLAN), the second set of network parameters comprise VLAN tags and instructions for updating an address resolution protocol (ARP) cache of the guest operating system.

The system of claim 41, wherein when the second attachment circuit comprises a generic routing encapsulation (GRE) tunnel, the second set of network parameters comprise a home agent address of the second PE routing device, a protocol for the GRE tunnel, and a GRE session key.

A method comprising:

• determining, by a provider edge (PE) routing device, that a virtual machine has migrated from a first computing device to a second computing device, wherein the virtual machine is communicatively coupled to a virtual private network (VPN) via a first attachment circuit using a first set of network parameters while executed by the first computing device, and wherein the PE routing device is communicatively coupled to the second computing device;
• and
• in response to determining that the virtual machine has migrated to the second computing device, sending a message to the second computing device including a second set of network parameters for causing the virtual machine to become communicatively coupled to the VPN via a second attachment circuit, wherein the second set of network parameters are different from the first set of network parameters, and wherein the second attachment circuit couples the virtual machine to the PE routing device.