The value of tmnxOamLTtraceFecProbeState indicates the current
overall probing state for the discovered paths of the Address FEC.
The tmnxOamLTtraceFecProbeState is considered as 'oK' when
probing on all the associated discovered paths is OK.
It is considered as 'failed' when probing on all the associated
discovered paths failed. It is considered as partially failed
when probing on one or more, but not all, discovered paths failed.