Asus GigaX2048 - Manual (Page 86)

GigaX Series L2 Managed Switch User’s Guide
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4.9 QoS
When you configure the QoS feature, you can select specific network traffic
to prioritize it according to its importance. It makes the network
performance more predictable and the bandwidth utilization more effective.
QoS pages include trust state, mapping, class set, policy set, policy attach,
and CoS function.
4.9.1 Trust State
This page is used to configure packets classification using port trust states.
Users can configure the port in following field:
• Port: select the port to make configuration.
• State: set the trust state. Three types of state are supported for each
port.
a) No
No trust state to classify ingress packets
b) CoS
Classifies ingress packets with the packet CoS values.
For tagged IP packets -- the DSCP value of the packet is
modified based on the CoS-to-DSCP map.
For untagged IP packets -- the DSCP value of the packet is
modified based on the default port CoS-to-DSCP map.
c) DSCP
Classifies ingress packets with the packet DSCP values.
For tagged non-IP packets -- the packet CoS value is set to 0.
For untagged non-IP packets -- the packet CoS value is set to
default port CoS.
For IP packets -- the switch modifies the CoS value by using
the DSCP-to-CoS map.