This read-write value sets the most-significant 32 bits of the administratively desired idleSlope bandwidth, in bits per second, for a credit-based-shaper traffic class, defaulting to 0; it must be read or written together with ieee8021FqtssAdminIdleSlopeLs, and if SRP is active it determines the actual operational bandwidth instead, making changes to this object have no operational effect. Admins set it to manually configure a traffic class's target bandwidth allocation when SRP isn't managing it dynamically. For example, in a network without SRP running, an admin would set this together with the LS-bits object to reserve a specific bandwidth, such as 75 Mbps, for time-sensitive AV streams in that traffic class.