In an embodiment, a guest operating system receives first host network information that identifies a host virtual network adapter. The first host network information uniquely identifies the host virtual network adapter. The guest operating system sends a first frame that comprises the first host network information to a guest virtual network adapter. The guest virtual network adapter sends the first frame to the host virtual network adapter. The guest operating system receives second host network information that identifies the host virtual network adapter. The second host network information uniquely identifies the host virtual network adapter. The guest operating system sends a second frame that comprises the second host network information to the guest virtual network adapter. The guest virtual network adapter sends the second frame to the host virtual network adapter identified by the second host network information in the second frame.