This attribute shows the aggregate SVC CIR (for traffic transiting in
the network through high priority queue) assigned to existing SVCs
on the interface.
The value of currentAggregateSvcCirHighQ could be greater than
the provisionable value of maximumAggregateSvcCirHighQ if the
value of maximumAggregateSvcCirHighQ has been changed during
the service of this FrUni.