This read-create Unsigned32 specifies the higher 32 bits of an additional CIR increment for a port-level QoS shaper, used when that supplemental rate exceeds 32 bits on its own. An administrator populates it for very large temporary rate boosts on high-capacity ports. For example, a large enterprise port granted a multi-gigabit temporary burst allowance would need this high-order field set alongside the low-order additional CIR object.