Indicate the mask to be logical-ANDed with the
destination address before being compared to
the value in the hh3cmplsVpnVrfRouteDest field.
For those systems that do not support
arbitrary subnet masks, an agent constructs the
value of the hh3cmplsVpnVrfRouteMask by reference
to the IP Address Class.
Any assignment (implicit or otherwise) of an
instance of this object to a value x must be
rejected if the bit-wise logical-AND of x with
the value of the corresponding instance of the
hh3cmplsVpnVrfRouteDest object is not equal to
hh3cmplsVpnVrfRouteDest.