The value of sysUpTime on the most recent occasion at
which any one or more of the session counters suffered
a discontinuity.
The relevant counters are the specific instances associated
with this BFD session of any Counter32 object contained in
the ciscoBfdSessPerfTable. If no such discontinuities have occurred
since the last re-initialization of the local management
subsystem, then this object contains a zero value.