In response to the demand for the consistency migration policy of virtual domain among hybrid clouds, a mechanism of virtual domain migration called IDVE was proposed. Via the protocol of consistency migration of virtual domain between the data centers and using encrypted virtual tunnel to migrate virtual network, the proposed mechanism makes the topology of virtual domains and network configurations unchanged. This scheme meets the needs of consistency migration among data centers, and lets the topology of networks and configurations set up in advance when virtual machines begin to migrate, which greatly reduces downtime of migration. The results of experiments showed that when migrating, virtual tunnel decreases up to 25%, and downtime is only 0.81 seconds, meeting the actual needs.
