The value of tAtmIntfCurrentMaxVccs indicates
the maximum number of VCCs that may be currently
supported on this ATM interface.
The value is the minimum of atmInterfaceMaxVccs,
and the atmInterfaceMaxVccs of the interface's
UNI/NNI peer as negotiated by ILMI.
If the interface does not negotiate with its peer
to determine the number of VCCs that can be
configured on the interface, then the value of
this object must equal atmInterfaceMaxVccs.