The value of tmnxDot1agCfmMepEthTestThreshold specifies when a
tmnxDot1agCfmMepEthTestComplete notification is sent. If
tmnxDot1agCfmMepEthTestThreshold is set to zero (0), a notification is
sent on the completion of any test for this MEP. Otherwise the
threshold must be exceeded and/or CRC failures must be detected to
send the notification.