Comtec CDM-840 Installation And Operation Manual page 310

CDM-840 Remote Router
Appendix J
The QoS Scheduler Calculation Solutions table for Case 3 / Example 2 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 64 kbps (8000 bytes).
o Queue 1 = 8000 * (9 / 30) = 2400 bytes (19.2 kbps)
o Queue 2 = 8000 * (8 / 30) = 2133 bytes (17.064 kbps)
o Queue 3 = 8000 * (7 / 30) = 1866 bytes (14.928 kbps)
o Queue 4 = 8000 * (6 / 30) = 1600 bytes (12.8 kbps)
2. After Round 1, only Queues 3 and 4 have yet to reach their minimum bandwidth.
Calculate the bandwidth for each queue based on the total weight (13) and the available
bandwidth (1534 bytes):
o Queue 3 = 1534 * (7 / 13) = 826 bytes (6.608 kbps)
o Queue 4 = 8000 * (6 / 30) = 708 bytes (5.664 kbps)
After Round 2, all bandwidth is consumed and the calculation loop stops.
Case 3 Example 2 Summary – Each queue's share is as follows:
 Queue 1 = 1000 bytes (8 kbps)
 Queue 2 = 2000 bytes (16 kpbs)
 Queue 3 = 2692 bytes (21.536 kbps)
 Queue 4 = 2308 bytes (18.464 kbps)
Round 1
Given Leftover
Weight
(kbps) (kbps)
9 12 –
8 10.762 –
7 9.328 –
6 8 –
30 40 0
Round 2
Given Leftover
Weight
(kbps) (kbps)
– – –
– – –
– – –
– – –
0 0 0
J–16
MN-CDM840
Revision 3
Round 'N'
Final kbps
Given Leftover
(kbps) (kbps)
– – –
– – –
– – –
– – –
0 0 0
12
10.762
9.328
8
40