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Quality of Service: Managing Bandwidth More Effectively
Contents
Global IP Type-of-Service Classifier . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-41
Assigning an 802.1p Priority for a Global
Example of Changing the Priority Setting on a Policy
IPv4 ToS/IPv6 Traffic Class Byte . . . . . . . . . . . . . . . . . . . . . . . . . . 6-42
IP-Precedence Classifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-44
Assigning an 802.1p Priority for a Global IP-Diffserv Classifier 6-45
Assigning a DSCP Policy for a Global IP-Diffserv Classifier . . . 6-49
Comparison of Global IP Type-of-Service Classifiers . . . . . . . . . 6-53
Global Layer-3 Protocol Classifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-54
Assigning a Priority for a Global Layer-3 Protocol Classifier . . . 6-54
Global VLAN-ID Classifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-56
Assigning a Priority for a Global VLAN-ID Classifier . . . . . . . . . 6-56
Assigning a DSCP Policy for a Global VLAN-ID Classifier . . . . . 6-58
Global Source-Port Classifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-62
Assigning a Priority for a Global Source-Port Classifier . . . . . . . 6-62
Assigning a DSCP Policy for a Global Source-Port Classifier . . 6-64
IP Multicast (IGMP) Interaction with QoS . . . . . . . . . . . . . . . . . . . . . . 6-69
Advanced Classifier-Based QoS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-70
Classifier-Based QoS Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-71
Classifier-Based QoS Configuration Procedure . . . . . . . . . . . . . . . . . 6-71
Configuring QoS Actions in a Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-76
Override of Global QoS Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-81
Viewing a Classifier-Based QoS Configuration . . . . . . . . . . . . . . . . . . 6-81
Classifier-Based QoS Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-85
Interaction with Other Software Features . . . . . . . . . . . . . . . . . . . . . . 6-85
Classifier-Based QoS Configuration Examples . . . . . . . . . . . . . . . . . . 6-86
QoS Policy for Layer 4 TCP/UDP Traffic . . . . . . . . . . . . . . . . . . . 6-87
QoS Policy for Subnet Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-87
Differentiated Services Codepoint (DSCP) Mapping . . . . . . . . . . . 6-88
Default Priority Settings for Selected Codepoints . . . . . . . . . . . . . . . 6-89
Displaying Non-Default Codepoint Settings . . . . . . . . . . . . . . . . . 6-90
Notes on Changing a Priority Setting . . . . . . . . . . . . . . . . . . . . . . . . . . 6-91
Error Messages for DSCP Policy Changes . . . . . . . . . . . . . . . . . . 6-92
When One or More Classifiers Are Currently Using the Policy . 6-92
QoS Queue Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-95
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