1Match device group of a packet's incoming/outgoing interface. 2.TP 3[\fB!\fP] \fB\-\-src\-group\fP \fIname\fP 4Match device group of incoming device 5.TP 6[\fB!\fP] \fB\-\-dst\-group\fP \fIname\fP 7Match device group of outgoing device 8