Dynamic IP-VPN architecture for cloud computing

In this paper we propose our new architecture of the Dynamic IP-VPN which is used for cloud computing services. There are some kinds of use cases of the cloud service. One is public cloud. Public cloud is on the Internet and can be accessed by any users, so the enterprise users adopt a passive attitude to using it for business use. Another is private cloud. Private cloud is separated from the Internet. Only the closed users can access it though the leased line. Though the security problem can be solved, it is a difficult point that the cost is high. The new third category is virtual private cloud which is connected to the users via IP-VPN on the Internet. However we are confronted with some problems to connect clouds to IP-VPN. Cloud computing environment are so flexible that a virtual machine might appear and disappear in a short term and migrate to other data center depending on the load condition. Conventional IP-VPN is not suitable for this situation. Therefore we discuss new requirements and architecture for cloud computing environment.