Cisco 2950G 24 Software Configuration Guide - Page 530
command is available only when the switch is, running the EI.
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Configuring QoS Chapter 26 Configuring QoS Beginning in privileged EXEC mode, follow these steps to configure the port to trust the classification of the traffic that it receives: Step 1 Step 2 Command configure terminal interface interface-id Step 3 mls qos trust [cos | dscp] Step 4 Step 5 Step 6 end show mls qos interface [interface-id] [policers] copy running-config startup-config Purpose Enter global configuration mode. Enter interface configuration mode, and specify the interface to be trusted. Valid interfaces include physical interfaces. Configure the port trust state. By default, the port is not trusted. The keywords have these meanings: cos-Classifies ingress packets with the packet CoS values. For tagged IP packets, the DSCP value of the packet is modified based on the CoS-to-DSCP map. The egress queue assigned to the packet is based on the packet CoS value. dscp-Classifies ingress packets with packet DSCP values. For non-IP packets, the packet CoS value is set to 0 for tagged packets; the default port CoS is used for untagged packets. Internally, the switch modifies the CoS value by using the DSCP-to-CoS map. This keyword is available only if your switch is running the EI. Note In software releases earlier than Release 12.1(11)EA1, the mls qos trust command is available only when the switch is running the EI. Use the cos keyword if your network is composed of Ethernet LANs. Use the dscp keyword if your network is not composed of only Ethernet LANs and if you are familiar with sophisticated QoS features and implementations. For more information about this command, refer to the command reference for this release. Return to privileged EXEC mode. Verify your entries. (Optional) Save your entries in the configuration file. To return a port to its untrusted state, use the no mls qos trust interface configuration command. For information on how to change the default CoS value, see the "Configuring the CoS Value for an Interface" section on page 26-13. For information on how to configure the CoS-to-DSCP map, see the "Configuring the CoS-to-DSCP Map" section on page 26-25. 26-12 Catalyst 2950 Desktop Switch Software Configuration Guide 78-14982-01
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