A Load Balancing Scheme for Multi-Link VPNs

다중링크 가상사설망을 위한 부하균등 기법

  • 김정우 ((주)오성사 전산부) ;
  • 손주영 (한국해양대학교 컴퓨터공학과)
  • Published : 2004.11.01


Nowadays, VPN(Virtual Private Network) devices supporting multi-link connections only utilize the second link to backup the fail-off primary link. In practice, however, the occurrence of the link fail-off is so rare that the capacity available on the second link is wasted. In this paper, a scheme of establishing a VPN with multi-links, and load balancing between the links under normal circumstances is proposed in order to take advantage of multi-links, and to eventually increase the effective bandwidth of the VPN. Additionally, the transition functionality is also applied for the link fail-off case like existing VPN devices. Consequently, the proposed scheme enables VPNs with multi-links not only to maintain the higher availability but also to highly increase the effective bandwidth.