QoS max-reserved-bandwidth

When configuring CBWFQ and LLQ, the maximum configurable bandwidth for such QoS mechanisms is 75% by default. This leaves 25% for other types of overhead traffic, which will match the class-default class, such as routing protocols and Layer 2 control traffic.

This value can be changed using the max-reserved-bandwidth percent command.

According to Cisco, this command has been deprecated and has been replaced by a modular QoS CLI (MQC) command.

https://networklessons.com/quality-of-service/qos-llq-low-latency-queueing-cisco-ios/