When the pingCtlType is 'icmpecho' , this
object represents the number of times that the target or
hop along the path to a target became disconnected. For
all other values of pingCtlType, this object will
remain zero.
For connectionless protocols this has no meaning,
and will consequently remain 0.
Since this error does not indicate any information about
the failure of an PING operation, no response time
information for this instance will be recorded in the
appropriate objects.