최근 인터넷 이용의 증가는 전송 링크의 광대역 지원과 멀티미디어 트래픽 QoS 보장 등의 문제 해결을 필수적으로 요구하게 되었다. 또한 현재 인터넷 IP 서비스에서 한 단계 향상된 서비스, 즉 가상 사설망(Virtual Private Network) 서비스나 Voice over IP, Video over IP, 웹 호스팅, 전자 상거래 제공 등이 현실적인 문제로 대두되면서 이를 지원할 수 있는 네트워크 구성 요소의 필요성은 증가하고 있다. 이를 해결하기 위하여 IP와 ATM의 통합으로 MPLS 기술 개발이 활발히 진행되고 있다. MPLS 시스템이 현재 IP 네트워크에서 지원하는 것 이상으로 보다 유용한 운용(Operation), 관리(Administration), 유지보수(Maintenance) 기능을 지원해야 하기 때문에 네트워크 운용과 관리(OAM)는 매우 중요하다. 본 논문에서는 ACE2000 ATM 교환기를 기반으로 하는 MPLS 시스템에서 OAM 계층과 라벨을 고려함으로써 ATM 시스템의 운용관리 기능과 연계처리 가능한 MPLS 시스템에서의 통합 운용관리 기능을 설계하고 구현한다.
KSP Keywords
Virtual private network(VPN), voice over IP
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