Patent ID: 7941539
Filing Date: 2011-05-10
Classification: G06F,H04L

Abstract:
1. A method for migrating a first virtual machine (VM), comprising: transmitting, prior to migration, a first packet between the first VM and a second VM using a first virtual network interface card (VNIC) and a second VNIC, wherein the first VM executes on a first blade in a first blade chassis prior to migration, wherein the second VM executes on a second blade in a second blade chassis, and wherein the first VNIC is associated with the first VM and the second VNIC is associated with the second VM; migrating the first VM and the first VNIC to the second blade; identifying a subnet of the first VM; identifying a subnet of the second VM, wherein the subnet of the second VM is different from the subnet of the first VM; creating a virtual router to execute on the second blade, wherein the virtual router is associated with a third VNIC and a fourth VNIC, wherein a first network address in the subnet of the first VM is assigned to the third VNIC, wherein a second network address in the subnet of the second VM is assigned to the fourth VNIC; creating a first virtual switch to connect the first VNIC to the third VNIC; creating a second virtual switch to connect the second VNIC to the fourth VNIC; and routing a second packet between the first VM and the second VM using the virtual router after migration.