Abstract: An information processing system includes a control apparatus including a storage unit that stores an entry where virtual object identification information, movement source apparatus identification information, and movement destination apparatus identification information are associated with each other, and a movement information generating unit that allows the storage unit to store a target entry when it is determined, based on a predetermined evaluation value of an amount of communication between a first information processing apparatus and a second information processing apparatus among the plurality of information processing apparatuses, that a virtual object operating on a third information processing apparatus is moved to a fourth information processing apparatus, and that the virtual object operating on the fourth information processing apparatus is moved to a fifth information processing apparatus, the target entry having virtual object identification information, movement source apparatus identificat

Abstract: This system includes: plural first information processing apparatuses on which a virtual machine that belongs to either of plural subnets; plural second information processing apparatuses on which a virtual router used for communication between subnets; a controller that controls communication paths within a subnet, deployment of the virtual machine and deployment of the virtual router; and plural switches that connects the plural first information processing apparatuses, the plural second information processing apparatuses and the controller.

Abstract: A control method includes storing, by a first computer, identification information of a user and identification information of a computer executing a software of the user which is related to a virtual machine in association with each other; extracting, by the first computer, identification information of a third computer already executing a software of a target user from a memory, when it is detected that the software is activated in the second computer and when identification information of the target user is stored in the memory; transmitting, by the first computer, the identification information of the third computer to the second computer; receiving, by a second computer, the identification information of the third computer from the first computer; and allowing, by the second computer, the second computer to transmit broadcast data corresponding to the software of the target user to the third computer, when the broadcast data is received.

Abstract: The information processing apparatus includes a storing unit and a transferring unit. The storing unit stores therein first association information, in which address information on a VM connected to a port is associated with information indicating a logical network, and second association information, in which information indicating the port is associated with information indicating the logical network to which the VM connected to the port belongs. When the address information received on a transmission source VM matches the address information indicated by the first association information, the transferring unit specifies the logical network that is indicated by the first association information and is associated with the matched address information.

Abstract: A communication method, which is executed by a computer having access to a storage device having stored therein correlation relations between layer 2 addresses and layer 3 addresses set for a group of devices on a network, includes extracting from the storage device when an acquisition request for a layer 2 address is to be transmitted, a first layer 2 address that corresponds to a layer 3 address included in the acquisition request; converting the destination of the acquisition request, from a second layer 2 address representing the group of devices, to the first layer 2 address; transmitting the converted acquisition request whose destination has been converted; and updating when a response to the converted acquisition request has been received, the first layer 2 address in the storage device, to the first layer 2 address included in response.

Abstract: A transfer device stores unicast addresses in association with a multicast address, where the multicast address is used for multicasting data to a plurality of transmission destination devices each serving as a transmission destination of the data, and the unicast address is used for transmitting data from the transfer device to a transmission destination device directly connected to the transfer device. Upon receiving first data to be transmitted to the transmission destination device, when a unicast address associated with a multicast address assigned to the first data is stored in the transfer device, the transfer device generates second data by changing the multicast address assigned to the first data into a unicast address that is associated with the multicast address, and transfers the second data to one of the plurality of transmission destination devices directly connected to the transfer device.

Abstract: A disclosed network management method includes: when the number of multicast domains in a network exceeds a predetermined threshold, setting one new multicast domain for at least a part of plural multicast domains based on an inclusion relationship among the plural multicast domains; and transmitting to a relay apparatus, data representing correspondence between a multicast address of the plural multicast domains and a multicast address of the one new multicast domain.

Abstract: A disclosed information processing apparatus, which is used in a multi-tenant network connected to the relay apparatuses, includes: an allocation unit that allocates, upon receipt of an allocation request including a first multicast address and a first tenant identification information from a relay apparatus, a second multicast address that is a multicast address, which is not allocated to any multicast domains, to a multicast domain identified by a combination of the first multicast address and the first tenant identification information; and a transmission unit that transmits the second multicast address to at least the relay apparatus that is a transmission source of the allocation request.

Abstract: A communication method, which is executed by a computer having access to a storage device having stored therein correlation relations between layer 2 addresses and layer 3 addresses set for a group of devices on a network, includes extracting from the storage device when an acquisition request for a layer 2 address is to be transmitted, a first layer 2 address that corresponds to a layer 3 address included in the acquisition request; converting the destination of the acquisition request, from a second layer 2 address representing the group of devices, to the first layer 2 address; transmitting the converted acquisition request whose destination has been converted; and updating when a response to the converted acquisition request has been received, the first layer 2 address in the storage device, to the first layer 2 address included in response.

Abstract: The information processing apparatus includes a storing unit and a transferring unit. The storing unit stores therein first association information, in which address information on a VM connected to a port is associated with information indicating a logical network, and second association information, in which information indicating the port is associated with information indicating the logical network to which the VM connected to the port belongs. When the address information received on a transmission source VM matches the address information indicated by the first association information, the transferring unit specifies the logical network that is indicated by the first association information and is associated with the matched address information.