다중 링크 가상사설망을 위한 부하균등 기법

Abstract

VPN (Virtual Private Network) is a technology that offers secure and reliable connectivity over an infrastructure of a shared public network such as the Internet. The VPNs maintain the same security and management policies as those of a private network. They provide the most cost-effective method for establishing a virtual point-to-point connection between a remote user and an enterprise customer's network.

Nowadays, VPN devices supporting multi-link connections use the second link only to backup the fail-off of the primary link. In practice, however, the fail-off of is hardly occurred, so the second link is used inefficiently.

In order to make the efficiency of the links higher, a scheme for balancing loads between the links is proposed in this paper. Additionally, a new scheme for establishing multi-link VPNs by using a new mutual authentication algorithm is proposed. The scheme should be applied before transferring the secured data among the end points, so as to make the load balancing between the links possible.

Consequently, the proposed schemes have shown that the bandwidth and the cost of multi-link VPNs are more effective.