mscLpEngArcAqmConnectionPoolUsage 1.3.6.1.4.1.562.36.2.1.12.23.5.4.10.1.2

This attribute indicates the total number of configured VCCs, VPCs and VPTs in AtmIfs associated with the AQM instance of the LogicalProcessor. A standard Vpt uses 3 connection resources and a basic Vpt uses 2.