Example 2 - Comtech EF Data CDM-760 Installation And Operation Manual

Appendix K
CDM-760 Advanced High-Speed Trunking Modem
Step 3 – The leftover 24000 kbps is available for Priority 4 queues (this example specifies no
Priority 3 queues). The Ingress DR in the Priority 4 queues is 28000 kbps. Because the available
bandwidth is only 24000 kbps, the bandwidth is therefore shared as per the configured weights.
The total weights are (2+4) = 6.
Step 4 – Calculate each bandwidth share, based on the total weights (6) and bandwidth
availability (24 000 kbps):
•
Q3 = 24000 * (2/6) = 8000 kbps
•
Q4 = 24000 * (4/6) = 16000 kbps
K.4.2.3.2

Example 2

• Select Min/Max as the QoS Mode.
•
Configure each queue with minimum bandwidth (Min BW), maximum bandwidth (Max BW),
and weight as shown in Table K-6.
•
The total available bandwidth is 30000 kbps.
Calculate each individual allocated kbps.
Queue
Q1
Q2
Q3
Q4
Total ►
Table K-7. Example 2 Solution – Calculated BW Allocation
Queue
Weight
Q1
9
Q2 8
Q3
7
Q4 – –
Total ►
24
Table K-7 displays the solution for Example 2.
Table K-6. Example 2 – QoS Classification
Min BW (kbps) Max BW (kbps)
2000 4000
4000 8000
6000 16000
8000 8000
20000 40000
1 Round
st
Given Leftover Weight
3750 1750 – –
3334 – – 8
2916 – – 7
– – – – – –
10000 1750 15
Delta Max BW
(Max-Min)
(kbps)
2000
4000
8000
0
14000
2 round
nd
Given Leftover Weight
– – – –
934 268
816 – –
– – – –
268
K–8
Revision 4
MN-CDM760
Weight Allowed BW
9 – –
8 – –
7 – –
6 – –
30 30000
N round
th
Given Leftover
– – – – – –
– – – – – –
7 268 – –
– – – – – –
7 0 0
Final
kbps
2000
4000
4000
– –
10000