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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 application
low: TOS (Dec) 104 = DSCP (Dec), 26 (Hex) 0x1A / for video application
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 or the amount of bandwith must not be higher as the real available interface bandwith.