This object specifies the Traffic Shaper Maximum Cell
Buffer Threshold for the Best-Effort Traffic Class.
The value of this object is expressed as a percent of
the value of rtsIfMaxThreshold object. A set request
for this object will succeed only if the value of the
ifAdminStatus object for this interface is 'down'.
The Traffic Shaping hardware may not have the support
to represent all the values and hence the value
installed in hardware could be different. And this
installed value will be available through the object
rtsIfBeClassMaxThrshInstalled. This object is not
instantiated for interfaces to which it cannot
be applied.