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Dell Configuration Guide for the S4048–ON System 9.14.2.4

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Allocating Bandwidth to Queue

The switch schedules packets for egress based on Deficit Round Robin (DRR). This strategy offers a guaranteed data rate.

Allocate bandwidth to queues only in terms of percentage in 4-queue and 8-queue systems. The following table shows the default bandwidth percentage for each queue.

The following table lists the default bandwidth weights for each queue, and their equivalent percentage which is derived by dividing the bandwidth weight by the sum of all queue weights.
Table 1. Default Bandwidth Weights Default Bandwidth Weights
Queue Default Bandwidth Percentage for 4–Queue System Default Bandwidth Percentage for 8–Queue System
0 6.67% 1%
1 13.33% 2%
2 26.67% 3%
3 53.33% 4%
4 - 5%
5 - 10%
6 - 25%
7 - 50%
NOTE The system supports 8 data queues.

When you assign a percentage to one queue, note that this change also affects the amount of bandwidth that is allocated to other queues. Therefore, whenever you are allocating bandwidth to one queue, Dell EMC Networking recommends evaluating your bandwidth requirements for all other queues as well.

Assign each queue a bandwidth percentage ranging from 1 to 100%, in increments of 1%.
bandwidth-percentage

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