Vpn communication control device, communication control method in vpn, and virtual dedicated network management device

A program which realizes functions which correspond to the VPN communication controlling device as an edge device in the network, comprising:

• a function corresponding to a common database supplying different network information for each customer to the information processing device by intalling the program to the information processing device so as to be used for setting a path by disposing in the VPN for setting a path between the edge devices in the network when a path setting request is issued by the customer;
• a link information setting function for setting the link information in this common DB;
• a link information exchanging function for exchanging the link information between the other device and the device itself;
• a route calculating function for determining the transferring route the used for exchanging the link information;
• a VPNDB generating function for generating a VPNDB which is a DB different for each VPN;
• a VPNID setting function for adding VPNID as an information for identifying each VPN to each link information categorized for each VPN related to the link information by categorizing the link information in the common DB;
• and
• a filtering function for filtrating the link information for the same VPNID from the link information to which the VPNID for the common DB is added so as to contain the link information in a corresponding VPNDB.

A communication controlling program in a VPN for enabling the communication controlling device in the edge device in a network, comprising:

• a link information exchanging section for exchanging the link information in detail between the devices;
• a VPN ID setting section for setting the VPN ID;
• a VPN ID adding section for adding the VPN ID to the link information which is transmitted from the other device, and
• a filtering section for extracting only the link information of which VPN ID is identical.

A virtual private network managing device for supplying a management information to a customer device which manages the virtual private network separately and integrally managing a virtual network supplying network which supplies the virtual private network comprising:

• a virtual route registering section which registers a virtual route which is formed by a data transferring route in the virtual network supplying network so as to correspond to a virtual link bandwidth;
• a route determining section which determines a corresponding route which is formed by a data transferring route which corresponds to the virtual route which is registered by the route determining section;
• a virtual link bandwidth allocating section which allocates the virtual link bandwidth to the corresponding route which is determined by the route determining section;
• and
• a virtual private network supplying device which supplies an information relating to the virtual link bandwidth which is allocated by the virtual link bandwidth allocating section to the customer device.

A virtual private network managing program for supplying a management information to the customer device which manages an virtual private network separately and letting a computer to perform processes for managing integrally the virtual network supplying network which supplies the virtual private network comprising the processes for:

• registering the virtual route which is formed by the data transferring route in the virtual network supplying network so as to correspond to the virtual link bandwidth;
• determining the corresponding route which is formed by the data transferring route which corresponds to the virtual route;
• allocating the virtual link to the corresponding route;
• and
• supplying the information which relates to the allocated virtual link bandwidth to the customer device.

A virtual private network managing program for letting a computer for performing processes for:

• detecting a route change of the data transferring route in the virtual network supplying network;
• determining the corresponding route which corresponds to the registered virtual route according to the data transferring route of which route change is detected if the route change is detected;
• allocating the virtual link bandwidth to the determined corresponding route;
• and
• supplying the information which relates to the allocated virtual link bandwidth to the customer device.