Comtec CDM-840 Installation And Operation Manual page 309

CDM-840 Remote Router
Appendix J
The QoS Scheduler Calculation Solutions table for Case 3 / Example 1 is as follows:
Queue
Weight
1
2
3
4
Total ►
This table shows the result of the steps taken to calculate the individual allocated
bandwidths:
1. Calculate the bandwidth for each queue based on the total weight (30) and the available
bandwidth of 40 kbps (5000 bytes).
o Queue 1 = 5000 * (9 / 30) = 1500 bytes (12 kbps)
o Queue 2 = 5000 * (8 / 30) = 1334 bytes (10.672 kbps)
o Queue 3 = 5000 * (7 / 30) = 1166 bytes (9.328 kbps)
o Queue 4 = 5000 * (6 / 30) = 1000 bytes (8 kbps)
After Round 1, all bandwidth is consumed and the calculation loop stops.
Case 3 Example 1 Summary – Each queue's share is as follows:
 Queue 1 = 1500 bytes (12 kbps)
 Queue 2 = 1334 bytes (10.762 kbps)
 Queue 3 = 1166 bytes (9.328 kbps)
 Queue 4 = 1000 bytes (8 kbps)
Case 3 / Example 2 – The Pri-Weighted QoS rules are configured as follows:
Queue
1
2
3
4
Total ►
Some of the weighted share is more than the minimum configured value. Each queue is
configured with minimum bandwidth and the weight as shown in the Case 3 / Example 2
rules table. The total allowed bandwidth is 8000 bytes per second.
Round 1
Given Leftover
Weight
(kbps) (kbps)
9 12 –
8 10.672 –
7 9.328 –
6 8 –
30 40 0
Min BW kbps (Bps)
8 (1000)
16 (2000)
24 (3000)
32 (4000)
80 (10000)
Round 2
Given Leftover
Weight
(kbps) (kbps)
– – –
– – –
– – –
– – –
0 0 0
Weight
9
8
7
6
30
J–15
MN-CDM840
Revision 3
Round 'N'
Final kbps
Given Leftover
(kbps) (kbps)
– – –
– – –
– – –
– – –
0 0 0
Allowed BW kbps (Bps)
–
–
–
–
64 (8000)
12
10.672
9.328
8
40