RELAY COMMUNICATION SYSTEM AND RELAY SERVERS

摘要

To build a relay communication system having a plurality of relay servers capable of communicating with another, a virtual network is dynamically created. VLAN group information is shared between VLAN client terminals that configure a VLAN group in the relay communication system. On the basis of the VLAN group information, a VLAN session is established between the VLAN devices from among the VLAN client terminals that are bootable as VLAN client terminals, and processing is performed for the sharing between VLAN devices of virtual address information created when the VLAN group is booted up. If the VLAN group has already been booted up when instructed to be booted up, then a VLAN group midway participation signal is transmitted to a midway participant VLAN client terminal, which is the transmission origin of the boot-up instruction, and an unestablished VLAN session pertaining to the midway participant VLAN client terminal is established.