VPN이란 공중망에서의 물리적인 구성과 무관하게 논리적으로 폐쇄된 사용자 집단을 구성하여 각종 통신 서비스를 제공하는 기술이다. 이러한 VPN을 구성하기 위해 IP/IP, GRE, L2TP, MPLS 등 다양한 기술들이 제시되었고, 그 중에서 MPLS를 이용한 방식이 다른 기술에서는 제공하기 어려운 QoS, 보안, 관리 유지 등을 제공하는데 많은 장점을 갖고 있다.본 논문에서는 기존의 라우터 제조업체들에서 제안된 Network 기반 VPN 즉, PE 라우터(Provider Edge Label Switch Router) 기반 MPLS VPN과는 달리 CE 라우터(Customer Edge LSR) 기반의 MPLS VPN 방식을 제시하였다. PE 라우터 기반 MPLS VPN에서의 단점을 보완하기 위해 CE 라우터 기반 MPLS VPN 제어 요소 및 동작 절차를 지역(Customer) 네트웍과 망사업자(Provider) 네트웍에서의 MPLS Edge 라우터에 기반하여 설계하였고, PE 라우터 기반의 MPLS VPN과 CE 라우터 기반의 MPLS VPN의 성능을 비교하였다.
KSP Keywords
Edge label, MPLS VPN
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