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Class of Service Configuration
3-221
3
CLI
– The following example shows how to configure the WRR weights for each
priority queue, then how to display the WRR weights assigned to each of the priority
queues.
Layer 3/4 Priority Settings
Mapping Layer 3/4 Priorities to CoS Values
This switch supports several common methods of prioritizing layer 3/4 traffic to meet
application requirements. Traffic priorities can be specified in the IP header of a
frame, using the priority bits in the Type of Service (TOS) octet or the number of the
TCP port. If the priority bits are used, the TOS octet may contain three bits for IP
Precedence, four bits for IP TOS (see page 3-227), or six bits for Differentiated
Services Code Point (DSCP) service. When these services are enabled, the
priorities are mapped to a Class of Service output queue.
Because different priority information may be contained in the traffic, the switch
maps priority values to the output queues in the following manner – The precedence
for priority mapping is IP Port Priority, IP Precedence/DSCP/ToS Priority, and then
Default Port Priority.
Mapping DSCP Priority
The DSCP is six bits wide, allowing coding for up to 64 different forwarding
behaviors. The DSCP retains backward compatibility with the three precedence bits
so that non-DSCP compliant, ToS-enabled devices, will not conflict with the DSCP
mapping. Based on network policies, different kinds of traffic can be marked for
different kinds of forwarding.
Console(config)#queue bandwidth 1 2 4 8
4-279
Console(config)#end
Console#show queue bandwidth
4-281
Queue ID Weight
-------- ------
0 1
1 2
2 4
3 8
Console
Summary of Contents for JetNet 5228G Series
Page 3: ...www edge core com 2 24FE 4G Layer 2 4 Ethernet Switch Management Guide V1 1...
Page 24: ...Tables xx...
Page 310: ...Configuring the Switch 3 264 3...
Page 636: ...Command Line Interface 4 326 4...
Page 650: ...Glossary Glossary 8...
Page 656: ...Index 6 Index...
Page 657: ......
Page 658: ......