Diffserv Qos Mode Example - Comtech EF Data CDM-570A Installation And Operation Manual

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Appendix L
Minimum Bandwidth (AF only) – Minimum specification that allows a committed information
rate (CIR) to be applied to user-defined classes of traffic, or the default of no minimum
bandwidth can be selected.
Maximum Bandwidth (AF only) – This can be assigned to a flow to restrict the maximum
bandwidth that any particular flow will utilize, or the default of no bandwidth restriction can be
selected.
1) Minimum and maximum bandwidth is only configurable for each of the four
Assured Forwarding classes.
2) Typically, DiffServ is implemented using exclusively Class Selector DSCP or
exclusively Expedited and Assured Forwarding DSCP. The IP Packet Processor is
fully DiffServ compliant and will work with either DiffServ implementation, or
with a combination of both.
WRED – The QoS system supports WRED-based congestion avoidance. WRED can be enable or
disabled on any queue. When WRED is disabled, upon overdriving the queue the packets will be
tail dropped.
L.1.3.1

DiffServ QoS Mode Example

Do these steps:
1. Select DiffServ QoS mode.
2. Set the modem Tx bandwidth to 10 Mbps.
3. The input streams to the modem are as follows:
Stream
Management
Networking Control
Voice
Video
Data-1
Data-2
Data-3
Data-4
Data-5
Data-6
Data-7
Priority PHB / DSCP Code
1 CS7 / b111000
2 CS6 / b110000
3 EXFD / b101110
3 CS5 / b101000
4 CS4 / b100000
5 CS3 / b011000
7 ASFD4 / b100010
7 ASFD3 / b011010
7 ASFD2 / b010010
7 ASFD1 / b001010
8 BE / bXXXXXX
L–9
Service Rate Drop Precedence
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
100 low
400 low
500 low
800 low
NA NA
MN-CDM570A
Revision 3
Data Rate
200 Kbps
800 Kbps
1Mbps
4 Mbps
550 Kbps
1450 Kbps
1 Mbps
1 Mbps
1 Mbps
1 Mbps
2 Mbps