The value of sysUpTime on the most recent occasion at
which any one or more of this session's counters
suffered a discontinuity. The relevant counters are
the specific instances associated with this session
of any Counter32 or Counter64 object contained in the
jnxMplsLdpSessionStatsTable.
The initial value of this object is the value of
sysUpTime when the entry was created in this table.
Also, a command generator can distinguish when a session
between a given Entity and Peer goes away and then is
're-established'. This value would change and
thus indicate to the command generator that this is a
different session.