Contents
Troubleshooting a Shortage of Per-Port Rule Resources on
the 3400cl/6400cl Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
Examples of QoS Resource Usage on 3400cl/6400cl
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19
Using QoS Classifiers To Configure Quality of Service for
Outbound Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
Viewing the QoS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
No Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23
QoS UDP/TCP Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
Assigning an 802.1p Priority Based on TCP or UDP Port
Number
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25
Assigning a DSCP Policy Based on TCP or UDP Port
Number
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
QoS IP-Device Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-30
Assigning a Priority Based on IP Address . . . . . . . . . . . . . . . . . . . 8-31
Assigning a DSCP Policy Based on IP Address . . . . . . . . . . . . . . 8-32
QoS IP Type-of-Service (ToS) Policy and Priority . . . . . . . . . . . . . . . 8-36
Assigning an 802.1p Priority to IPv4 Packets on the Basis
of the ToS Precedence Bits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-37
Assigning an 802.1p Priority to IPv4 Packets on the Basis
of Incoming DSCP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-38
Assigning a DSCP Policy on the Basis of the DSCP in
IPv4 Packets Received from Upstream Devices
. . . . . . . . . . . . . 8-42
Details of QoS IP Type-of-Service . . . . . . . . . . . . . . . . . . . . . . . . . 8-46
QoS Layer-3 Protocol Priority (5300xl Switches Only) . . . . . . . . . . . 8-49
Assigning a Priority Based on Layer-3 Protocol . . . . . . . . . . . . . . 8-49
QoS VLAN-ID (VID) Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-51
Assigning a Priority Based on VLAN-ID . . . . . . . . . . . . . . . . . . . . 8-51
Assigning a DSCP Policy Based on VLAN-ID (VID) . . . . . . . . . . . 8-53
QoS Source-Port Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-57
Assigning a Priority Based on Source-Port . . . . . . . . . . . . . . . . . . 8-57
Assigning a DSCP Policy Based on the Source-Port . . . . . . . . . . 8-59
Differentiated Services Codepoint (DSCP) Mapping . . . . . . . . . . . . . 8-62
Default Priority Settings for Selected Codepoints . . . . . . . . . . . . 8-64
Quickly Listing Non-Default Codepoint Settings . . . . . . . . . . . . . 8-64
Note On Changing a Priority Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-65
IP Multicast (IGMP) Interaction with QoS . . . . . . . . . . . . . . . . . . . . . . . . . 8-69
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