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Defining CoS Settings
Class of Service global parameters are set from the
CoS Settings
page.

Configuring QoS Settings

The
CoS Settings
page contains fields for enabling or disabling CoS. 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 page, click
CoS Settings
in the tree view.
Figure 7-1. CoS Settings
Trus t Mo de
— Defines which fields within the packet are used to determine the egress queue.
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:
None
— All traffic is mapped to the best effort queue (q2).
CoS
— The egress queue assignment is determined by the IEEE802.1p VLAN priority tag
(VPT) or by the default VPT assigned to a port. This is the trust default value.
DSCP
— The egress queue assignment is determined by the DSCP field.
Interface
— The specific port or LAG to configure.
Disable "Trust" Mode on Interface
— Disables Trust mode on the specified interface. This setting
overrides the Trust mode configured on the Ethernet switch globally.
Set Default CoS For Incoming Traffic To
— Sets the default CoS tag value for untagged packets.
The CoS tag values are 0-7. The default value is 0.