Comtech EF Data CDM-570A - Manual (Page 566)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Appendix L Revision 2
L–6
QoS Rule Hierarchy – The QoS Rule Hierarchy is the same as Maximum Bandwidth/Priority QoS.
QoS Statistics – QoS Statistics are displayed as Maximum Bandwidth/Priority QoS.
L.1.2.1 Min/Max QoS Mode Example
Do these steps:
1. Select Min/Max QoS mode.
2. Set Modem Tx bandwidth to 20 Mbps.
3. Configure the Min/Max QoS rules as follows:
Index Protocol Src IP/
mask
Dest IP/
mask
Min
Src Port
Max
Src Port
Min Dst
Port
Max Dst
Port
Min
BW
Max
BW
Filter WRED
1 UDP ***/* ***/* 0 65535 0 65535 2500 4000 N N
2 TCP ***/* ***/* 0 65535 0 65535 2500 99999 N N
3 HTTP ***/* ***/* 0 65535 0 65535 0 99999 N N
4 Def ****/* ***/* 0 65535 0 65535 0 9999 N N
4. The input data streams are as follows:
Stream Protocol Src IP Dest IP Src Port Dest Port Steam Data Rate
1 UDP ***/* ***/* *** *** 10000 Kbps
2 TCP ***/* ***/* *** *** 5000 Kbps
3 HTTP ***/* ***/* *** *** 7000 Kbps
4 def ***/* ****/* *** *** 10000 Kbps
QUESTION : What are the total output data rates and the individual stream data rates?
ANSWER:
• In Min-Max QoS mode, other than the default rule, which is configured as Priority 9, all QoS
rules are configured as Priority 8.
• In this mode, the minimum bandwidth for all rules – the excluding the default rule – will be
served first in round robin fashion. In this example, the total minimum BW for Rules 1 and 2
is 5000 Kbps. Since the total bandwidth is 20 Mbps, it has enough bandwidth to serve.
• After serving the minimum bandwidth, the leftover bandwidth is 15 Mbps (20,000 Kbps–
5000 Kbps).
• Leftover bandwidth will be served among all rules in round robin fashion until it hits
maximum bandwidth limitations.