The amount of time during the last active state, in
which protocol exchanges occurred. The minimum time required
to allow updates to be exchanged for a 'successfull update
cycle' is the greater of 3 minutes, or 1/2 the active time.
If the ciscoSnapshotExchangeTimer is less than this, the
quiet state will use the retry interval to determine when next
to go active.
An instance of this object will only be present when
the associated value of ciscoSnapshotClient is true for this
interface.