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Mapping Calculated Weights to Hardware Weights

The calculated weight in a traffic control profile is mapped to hardware weight, but the hardware only supports a limited WFQ profile. The weights are rounded to the nearest hardware weight according to the values in Table 63.

Table 63: Rounding Configured Weights to Hardware Weights

Traffic Control Profile Number	Number of Traffic Control Profiles	Weights	Maximum Error
1–16	16	1–16 (interval of 1)	50.00%
17–29	13	18–42 (interval of 2)	6.25%
30–35	6	45–60 (interval of 3)	1.35%
36–43	8	64–92 (interval of 4)	2.25%
44–49	6	98–128 (interval of 6)	3.06%
50–56	7	136–184 (interval of 8)	3.13%
57–62	6	194–244 (interval of 10)	2.71%
63–63	1	255–255 (interval of 11)	2.05%

From the table, as an example, the calculated weight of 18.9 is mapped to a hardware weight of 18, because 18 is closer to 18.9 than 20 (an interval of 2 applies in the range 18–42).

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