The value of tmnxOamLTtracePathProbeState indicates the current
probing (ping) state for the discovered ECMP path.
The tmnxOamLTtracePathProbeState is considered as 'failed' when
number of consecutive timeouts for the ping request reached its
maximum allowed limit (tmnxOamLTtraceAutoPrMaxFailures).
The tmnxOamLTtracePathProbeState is considered as 'oK' after receiving
a successful ping response for the associated path.