System information

Chapter 6: Configuring Quality of Service | 173
GS752TXS Smart Switch Software Administration Manual
2. Select Global Trust Mode to specify whether to trust a particular packet marking at ingress.
Global Trust Mode can only be one of the following:
• Untrusted. Do not trust any CoS packet marking at ingress.
• 802.1p. The eight priority tags that are specified in IEEE 802.1p are p0 to p7. The
QoS setting lets you map each of the eight priority levels to one of seven internal
hardware priority queues.
• DSCP. The six most significant bits of the DiffServ field are called the Differentiated
Services Code Point (DSCP) bits.
3. Select Interface Trust Mode to specify whether to trust a particular packet marking at
ingress.
4. Interface Trust Mode can only be one of the following:
• Untrusted. Do not trust any CoS packet marking at ingress.
• 802.1p. The eight priority tags that are specified in IEEE 802.1p are p0 to p7. The
QoS setting lets you map each of the eight priority levels to one of seven internal
hardware priority queues.
• DSCP. The six most significant bits of the DiffServ field are called the Differentiated
Services Code Point (DSCP) bits.
5. Click Cancel to cancel the configuration on the screen and reset the data on the screen to
the latest value of the switch.
6. If you change any of the settings on the page, click Apply to send the updated configuration
to the switch.
CoS Interface Configuration
Use the CoS Interface Configuration page to apply an interface shaping rate to all interfaces
or to a specific interface.
To display the CoS Interface Configuration page, click the QoS  CoS tab, and then click the
Advanced
 CoS Interface Configuration link.