COMPUTER-READABLE RECORDING MEDIUM, INFORMATION PROCESSING APPARATUS, AND VM SWITCHING METHOD

A server detects an abnormality of a VM being a transfer destination of a packet; rewrites, when the VM is switched, a first relationship between a transfer destination MAC address and a port number of the VM before switching to a first relationship between the MAC address and a port number of the switched VM; decides, from the port number being matched based on the rewritten first relationship and a second relationship among a port number of the switched VM, a transfer destination MAC address, and a transfer destination IP address, the transfer destination MAC address and the transfer destination IP address of the switched VM; rewrites the transfer destination MAC address and the transfer destination IP address included in the header of the packet received from a network to the decided MAC address and the IP address; and transfers the rewritten packet to the switched VM.