| 摘要 |
A method of, and point-to-point trail selector (PTP-TS) for, implementing a virtual private network (VPN) between a plurality of sites with terminations connected to routers in the network. The PTP-TS (301) including input means (302) for receiving from a client (303) an absolute quality of service (AQoS) specification that specifies service required between respective terminations of the VPN; processor means (305) coupled to the input means and operative to create a set of paths between at least some of the routers, wherein each path supports connection orientated data transfer with a quality of service specification, and to configure the set of paths such that (i) said set of paths satisfies the AQoS specification between said terminations of the VPN; and (ii) the cost of network resource for implementing the VPN, including said paths and routers, is minimised. Suitably there is further included an identification means (304) for obtaining information about network resource available for implementing the VPN, wherein the identification means is coupled to the processor means (305), and the processor means creates and configures the set of paths using the network resource information. |
