This read-create Unsigned32 holds the upper 32 bits of the Service OAM Committed Information Rate (SOAM-CIR) on a per-COS access-port QoS Shaper, paired with cmAccPortQosShaperSoamCIRLo for larger values. It's needed only if the reserved OAM bandwidth itself is unusually large, which is uncommon since SOAM CIR is typically a small guaranteed trickle rather than a bulk rate. For example, on an access-port shaper where SOAM-CIR is provisioned at just a few kbps, cmAccPortQosShaperSoamCIRHi would remain zero with the value entirely carried in the low-order object.