QoS Global Settings

The Global Settings page contains information for enabling Trust on the device (see the Trust Mode field below). This configuration is active when the QoS mode is Basic mode. Packets entering a QoS domain are classified at the edge of the QoS domain.

To define the Trust configuration, complete the following steps:

Procedure

Step 1

Click Quality of Service > QoS Basic Mode > Global Settings.

Step 2

Select the Trust Mode while the device is either in Basic or Advanced mode. If a packet CoS level and DSCP tag are mapped to separate queues, the Trust mode determines the queue to which the packet is assigned:

  • CoS/802.1p—Traffic is mapped to queues based on the VPT field in the VLAN tag, or based on the per-port default CoS/802.1p value (if there’s no VLAN tag on the incoming packet), the actual mapping of the VPT to queue can be configured in the mapping CoS/802.1p to Queue page.

  • DSCP—All IP traffic is mapped to queues based on the DSCP field in the IP header. The actual mapping of the DSCP to queue can be configured in the DSCP to Queue page. If traffic isn’t IP traffic, it’s mapped to the best effort queue.

  • CoS/802.1p-DSCP—Either CoS/802.1p or DSCP whichever has been set.

Step 3

Click Apply. The Running Configuration file is updated with the new DSCP values. Click Restore Defaults to go back to the default settings.