extensions/libxt_CLASSIFY.man - maze/iptables - Git at Google

 This module allows you to set the skb->priority value (and thus classify the packet into a specific CBQ class).
 .TP
 \fB--set-class\fP \fImajor\fP\fB:\fP\fIminor\fP
 Set the major and minor class value.
	This module allows you to set the skb->priority value (and thus classify the packet into a specific CBQ class).
	.TP
	\fB--set-class\fP \fImajor\fP\fB:\fP\fIminor\fP
	Set the major and minor class value.