This read-create Unsigned32 specifies the higher 32 bits of the Committed Information Rate for a port-level QoS shaper, needed when the rate exceeds the range representable in 32 bits alone. An administrator sets it for ports shaped at multi-gigabit committed rates. For example, a 10 Gbps trunk port's CIR configuration requires this high-order field to be populated alongside the low-order CIR object.