Filter
Top Products
Configuring Quality of Service 341
• Trust Mode—Determines which packet fields to use for classifying packets entering
the switch. When no rules are defined the traffic containing the predefined packet
field (CoS, DSCP or TCP/UDP port) is mapped according to the relevant trust modes
table. Traffic not containing a predefined packet field is mapped to best effort. The
possible trust mode field values are:
– CoS—Indicates the output queue assignment is determined by the IEEE802.1p
VLAN priority tag (VPT) or by the default VPT assigned to a port.
– DSCP—Indicates the output queue assignment is determined by the DSCP field.
– TCP/UDP—Indicates the output queue is determined by the TCP/UDP port.
NOTE: The interface Trust setting overrides the global Trust setting.
Enabling Quality of Service:
1 Open the QoS Global Settings page.
2 Select Enable in the Quality of Service field.
3 Click Apply Changes. Quality of Service is enabled on the device.
Enabling Trust:
1 Open the QoS Global Settings page.
2 Select the Trust setting in the Trust Mode field.
3 Click Apply Changes. Trust is enabled/disabled on the device.
Enabling Trust Using the CLI Commands
The following table summarizes the equivalent CLI commands for configuring fields in the
QoS Global Settings page.
The following is an example of the CLI commands:
Console (config)# qos
CLI Command Description
qos trust [cos | dscp | tcp-
udp-port]
Configures the system to basic mode and
the trust state.
qos
Enables QoS on the device.
no qos trust
Returns to the non-trust state.