This topic describes the Cisco IOS commands that are required to configure LAN-based classification and marking.
The figure shows some of the QoS configuration commands that are necessary for Catalyst 2950 switches. The defaults for its interfaces are as follows:
■ Pass-through mode is disabled.
■ Trusted boundary is disabled.
mls qos trust [cos [pass-through dscp] | device cisco-phone | dscp]
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