Planning a QoS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Prioritizing and Monitoring QoS Configuration Options . . . . . . 6-15
Policy Enforcement Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
QoS Resource Usage and Monitoring . . . . . . . . . . . . . . . . . . . . . . 6-15
Planning and Monitoring Rule Usage . . . . . . . . . . . . . . . . . . . . . . 6-16
Managing QoS Resource Consumption . . . . . . . . . . . . . . . . . . . . . 6-16
Troubleshooting a Shortage of Rule Resources . . . . . . . . . . . . . . 6-17
Examples of QoS Resource Usage . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Using QoS Classifiers To Configure QoS for Outbound Traffic . . . . . . . . 6-20
Assigning an 802.1p Priority to IPv4 Packets on the Basis
Assigning an 802.1p Priority to IPv4 Packets on the Basis
Assigning a DSCP Policy on the Basis of the DSCP
Example of Changing the Priority Setting on a Policy When
Viewing the QoS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
No Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
QoS UDP/TCP Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Assigning 802.1p Priority Based on TCP or UDP Port Number . 6-22
Assigning a DSCP Policy Based on TCP or UDP Port Number . 6-24
QoS IP-Device Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
Assigning a Priority Based on IP Address . . . . . . . . . . . . . . . . . . . 6-29
Assigning a DSCP Policy Based on IP Address . . . . . . . . . . . . . . 6-30
QoS IP Type-of-Service (ToS) Policy and Priority . . . . . . . . . . . . . . . 6-34
of the ToS Precedence Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
of Incoming DSCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36
in IPv4 Packets Received from Upstream Devices . . . . . . . . . . . 6-40
Details of QoS IP Type-of-Service . . . . . . . . . . . . . . . . . . . . . . . . . 6-43
QoS VLAN-ID (VID) Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46
Assigning a Priority Based on VLAN-ID . . . . . . . . . . . . . . . . . . . . 6-46
Assigning a DSCP Policy Based on VLAN-ID (VID) . . . . . . . . . . . 6-48
QoS Source-Port Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-52
Assigning a Priority Based on Source-Port . . . . . . . . . . . . . . . . . . 6-52
Assigning a DSCP Policy Based on the Source-Port . . . . . . . . . . 6-54
Steps for Creating a Policy Based on Source-Port Classifiers . . 6-54
Differentiated Services Codepoint (DSCP) Mapping . . . . . . . . . . . . . 6-58
Default Priority Settings for Selected Codepoints . . . . . . . . . . . . 6-59
Quickly Listing Non-Default Codepoint Settings . . . . . . . . . . . . . 6-60
Effect of “No-override” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-61
Note On Changing a Priority Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-61
One or More Classifiers Are Currently Using the Policy . . . . . . 6-62
IP Multicast (IGMP) Interaction with QoS . . . . . . . . . . . . . . . . . . . . . . . . . 6-65
viii
