libxt_DSCP.man

This target alters the value of the DSCP bits within the TOS
header of the IPv4 packet.  As this manipulates a packet, it can only
be used in the mangle table.
.TP
\fB\-\-set\-dscp\fP \fIvalue\fP
Set the DSCP field to a numerical value (can be decimal or hex)
.TP
\fB\-\-set\-dscp\-class\fP \fIclass\fP
Set the DSCP field to a DiffServ class.