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446 Configuring Quality of Service
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Defining Basic QoS Settings
Use the
Basic QoS Settings
page to configure the Global Trust Mode, which is set on specified
interfaces. Packets entering a QoS domain are classified at the edge of the QoS domain. When the
packets are classified at the edge, Trust Mode can be configured on ports.
DSCP values can be rewritten at the QoS administrative domain boundary. If two QoS domains
have different DSCP definitions, the DSCP values can be rewritten. The DSCP map is applied
only to ingress, DSCP-trusted ports.
To open
Basic QoS Settings
page, click
Quality of Service
→
Basic QoS Mode
→
Basic QoS Settings
in the tree view.
Figure 10-10. Basic QoS Settings Page
Trust Mode
— Selects the trust mode. If a packet’s CoS tag, DSCP tag, and TCP/UDP mapping
are mapped to different queues, the
Trust Mode
determines the queue to which the packet is
assigned. Possible values are:
CoS
— Sets trust mode to CoS on the device. The CoS mapping determines the packet
queue.
DSCP
— Sets trust mode to DSCP on the device. The DSCP mapping determines the
packet queue.