LAN에서 사용되던 이더넷 기술은 단순성과 낮은 투자/운용 비용으로 인하여 WAN/ MAN 영역으로까지 사용이 급속도로 확산되고 있다. 캐리어급 이더넷 OAM 기술은 LAN 중심의 이더넷 기술을 캐리어급 망에서 사용할 수 있게 해주는 주요 기술로 IEEE, ITU-T, MEF 등 표준화 기구에서 이에 대한 표준화가 진행되고 있다. 본 논문에서는 크게 PHY 계층과 MAC 계층의 두 부분으로 구성된 이더넷에서 단일 링크 상에서 발생하는 동작들을 처리하는 ETY 계층 OAM 기술과 다중 링크로 연결된 이더넷 경로상에서 발생하는 동작들을 처리하는 ETH 계층 OAM에 대한 기술을 분석하여 정리한다.
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