3Com 3CRDSF9PWR-US - OfficeConnect Managed Fast Ethernet PoE..., User Manual

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Configuring Trust
Settings
The Trust Setup Page is used to enable the processing of priority tags in
ingress packets based on IP DSCP priority values or CoS values. Ingress
packets are processed in the following manner:
■
If the trust mode is set to IP DSCP, and the ingress packet type is IPv4,
then priority processing will be based on the DSCP value in the ingress
packet.
■
If the trust mode is set to IP DSCP, and a non-IP packet is received, the
packet’s CoS value is used for priority processing if the packet is
tagged. For an untagged packet, the default port priority is used for
priority processing.
■
If the trust mode is set to CoS, and the ingress packet type is IPv4,
then priority processing will be based on the CoS value in the ingress
packet. For an untagged packet, the default port priority is used for
priority processing.
To select the trust mode:
1 Click Device > QoS > Trust > Setup . The Trust Setup Page opens:
Figure 94 Trust Setup Page
The Trust Setup Page contains the following fields:
■
Trust Mode — Specifies which packet fields to use for classifying
packets entering the device. The possible Trust Mode field values are:
■
CoS — Classifies traffic based on the CoS tag value.
■
DSCP — Classifies traffic based on the IP DSCP tag value.