DELL 6024 User Manual

Configuring Quality of Service

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TCP/UDP Port — Sets trust mode to TCP/UDP Port on the device. The TCP/UDP Port 
mapping determines the packet queue.

Always Rewrite DSCP — Rewrites the packet DSCP tag according to the QoS DSCP Rewriting 
configuration. Always Rewrite DSCP can only be checked if the Trust Mode is DSCP.
Disable Trust Mode on Interface — Disables the trust mode for the select port or LAG.
Interface — Port or LAG on which trust mode is disabled. 

Setting the Trust Mode

1

Open the Basic QoS Settings page.

2

Select a Trust Mode.

3

If the Trust Mode is DSCP, check Always Rewrite DSCP so that the DSCP tags are rewritten 
as mapped.

4

Click Apply Changes. 
The Trust Mode is selected, and the device is updated.

Disabling Trust Mode for Interfaces: 

1

Open the Basic QoS Settings page.

2

Click Show All to display the Basic QoS Settings Table page.

3

Check Disable Trust Mode for all interfaces on which Trust Mode should be disabled.

4

Click Apply Changes. 

Defining Basic QoS Settings Using the CLI Commands

The following is an example of the CLI commands: 

console(config)# qos trust dscp

console(config)# qos dscp-mutation

Table 10-9.

Basic QoS Settings CLI Commands

CLI Command

Description

qos trust cos | dscp | 

tcp-udp-port

In the global context, this command is 
used to configure the system to basic 
mode and the trust state.

qos trust

In the interface configuration context, 
this command is used to enable each port 
trust state.

qos dscp-mutation

Applies the DSCP mutation map to a 
system DSCP trusted port (always 
rewrites DSCP on this port).