D-Link DWS-3160-24TC Reference Manual page 461

DWS-3160 Series Gigabit Ethernet Unified Switch Web UI Reference Guide
Click the Configure Selected Attribute to see the attribute configuration for that policy.
Click the <<Back button to return to the previous window.
Click the Apply button to accept the changes made.
Click the Cancel button to discard the configuration.
Mark CoS – The packets are marked by DiffServ with the specified CoS
value before being presented to the system forwarding element. Enter a
value in the Conform CoS Value field between 0 and 7.
Mark IP DSCP – The packets are marked by DiffServ with the specified
DSCP value before being presented to the system forwarding element.
Select Conform DSCP Keyword from the drop-down menu.
Mark IP Precedence – The packets are marked by DiffServ with the
specified IP Precedence value before being presented to the system
forwarding element. Enter a value in the Conform IP Precedence Value
field between 0 and 7.
Send – The packets are presented unmodified by DiffServ to the system
forwarding element.
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