CDM-625 Advanced Satellite Modem Revision 13
Quality of Service (QoS) MN-CDM625
20–12
20.3.2 Layer 3 QoS Min-Max Mode
In Min-Max mode, up to 32 QoS rules can be configurable using source IP subnet, destination IP
subnet, source port range, destination port range, and protocol. For each created rule, you can
also set the QoS treatment, such as guaranteed minimum bandwidth, maximum clipping
bandwidth, WRED enable or disable, and filter rule.
When WRED is enabled for a specific queue, QoS randomly drops packets after reaching 50% of
the QoS queue.
When the FILTER option is enabled for a rule, Layer 3 QoS provides the ability to filter the packet
completely.
QoS Example 7
1. Min-Max Layer 3 QoS mode is selected.
2. Modem Tx bandwidth is set to 20 Mbps.
3. The Min-Max QoS rules are configured as follows:
Index Protocol
VLAN
Range
TOS
Src IP/
mask
Dest
IP/
mask
Min
Src
Port
Max
Src
Port
Min
Dst
Port
Max
Dst
Port
Min
BW
Max
BW
Priority Filter WRED
1 UDP
0-4094 255
***/* ***/* 0 65535 0 65535
2500 4000
1 N N
2 TCP
0-4094 255
***/* ***/* 0 65535 0 65535
2500 99999
2 N N
3 HTTP
0-4094 255
***/* ***/* 0 65535 0 65535
0 99999
3 N N
4 Def
0-4094 255
****/* ***/* 0 65535 0 65535
0 9999
9 N N
4. The input data streams are as follows:
Stream Protocol VLAN Range TOS Src IP Dest IP Src Port Dest Port
Steam Data
Rate
1 UDP
0-4094 255
***/* ***/* *** *** 10000 Kbps
2 TCP
0-4094 255
***/* ***/* *** *** 5000 Kbps
3 HTTP
0-4094 255
***/* ***/* *** *** 7000 Kbps
4 DEF
0-4094 255
***/* ***/* *** *** 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.
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