Weighted Scheduling; K.4.2.2 Weighted Scheduling - Comtech EF Data CDM-760 Installation And Operation Manual

Appendix K
CDM-760 Advanced High-Speed Trunking Modem

K.4.2.2 Weighted Scheduling

In weighted scheduling mode, the QoS scheduler calculates each quantum based on available
bandwidth, total weights, and per-queue weights as follows:
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There are three exceptions when assigning per-queue quantum to each queue:
1. Per-queue quantum is greater than the maximum configured data rate (Max BW).
When the LAN egress data rate is greater than the assigned Max BW, the scheduler drains
the packets up to the maximum bandwidth only, and drops all other packets. In this
scenario, weight factor will not be applied.
2. Per-queue quantum is less than the maximum configured data rate but more than the
minimum configured data rate.
In this scenario, when the available bandwidth is greater than the total Min BW but less
than total Max BW, the scheduler will first schedule all queues until the minimum
bandwidth is met.
3. Per-queue quantum is less than minimum bandwidth configured.
K–6
Revision 4
MN-CDM760
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