QoS Quality of Service

The amount of bandwith must not be higher as the real available interface bandwith.
The ratio must not exceed 40:1
If there is only traffic for one queue it may use the unused bandwidth of the other queues

fixed Bandwidth
example:
high: TOS (Dec) 184 = DSCP (Dec), 46 (Hex) 0x2E / for voice
low: TOS (Dec) 104 = DSCP (Dec), 26 (Hex) 0x1A / for video
default: All OTHER = not specified

ratio: 19:6:1 = 26Mbit/s bandwidth. This is also the interface output limit.

The queue limits will only be enforced, if there is more data than fits through the main limit