Configuring Qos Global Settings - Dell PowerConnect 5316M User Manual

Configuring QoS Global Settings

The QoS Global Settings page contains fields for enabling or disabling QoS. In addition, the Trust
mode can be selected. The Trust mode relies on predefined fields within the packet to determine
the egress queue. To open the QoS Global Settings page, click Quality of Service→ QoS Global
Parameters → QoS Settings in the tree view.
Figure 9-125. QoS Global Settings
Quality of Service — Enables or disables managing network traffic using Quality of Service.
Trust Mode — Determines which packet fields are used to classify packets entering the Ethernet
Switch Module. When no rules are defined, the traffic containing the predefined CoS or DSCP
packet field is mapped according to the selected trust mode. Traffic not containing a predefined
packet field is mapped to the best effort queue (q2). The possible Trust Mode field values are:
CoS — The egress queue assignment is determined by the IEEE802.1p VLAN priority tag
(VPT) or by the default VPT assigned to a port. The Ethernet Switch Module default is the
IEEE802.1p.
DSCP — The egress queue assignment is determined by the DSCP field.
NOTE:
The interface Trust settings overrides the global Trust setting.
Enabling Quality of Service:
1
Open the QoS Global Settings page.
Configuring Quality of Service
291