ETH-CFM OAM commands

oam
    - eth-cfm
        - eth-test mac-address mep mep-id domain md-index association ma-index [priority priority] [data-length data-length]
        - linktrace mac-address mep mep-id domain md-index association ma-index [ttl ttl-value]
        - loopback mac-address mep mep-id domain md-index association ma-index [send-count send-count] [size data-size] [priority priority] 
        - one-way-delay-test mac-address mep mep-id domain md-index association ma-index [priority priority]
        - two-way-delay-test mac-address mep mep-id domain md-index association ma-index [priority priority]
        - two-way-slm-test mac-address mep mep-id domain md-index association ma-index [fc {fc-name} [profile {in | out}]] [count send-count] [size data-size] [timeout timeout] [interval interval]