The value of tmnxDot3OamHoldTime specifies the number of seconds
the efm-oam protocol should wait after dot3OamOperStatus transitions
from 'operational (9)' to a non-operational state before going back to
the 'operational (9)' state again. Note that a transition to the
'linkFault (2)' state does not cause tmnxDot3OamHoldTime to be used if
dot3OamOperStatus was previously in the 'operational (9)' state.