Synchronizing Multicast Groups

Abstract

Embodiments of the invention relate to synchronizing multicast groups of a virtual machine during migration of the virtual machine. A first list and a second list, indicating multicast groups corresponding to the first port and second port respectively, are obtained in response to detection of migration of the virtual machine from a first port to a second port of a same switch. The second list is updated so that the second list contains the multicast groups in the first list. An undesired multicast group is aged. Multicast groups of a virtual machine may be synchronized in the process of migration of the virtual machine, thereby reducing or removing the time during which the virtual machine multicast service is disrupted.

Dependencies are inferred from the claim text.