Hello All, I have written two network drivers master0 and slave0, where the packets received by master0 interface will be forwarded to the slave0 interface and vice versa. I have further linked the master0 interface to a usb driver in such way that, interface registered only on connecting the usb device. My requirement is that, when ever the master interface is up, slave interface should be brought up automatically and when the master device is disconnected then even the slave interface should be disconnected, so that the slave interface drops the data. Can some one give some pointer for doing this in a right way. I have been trying to understand the pernet device framework, can someone please explain it briefly. Thanks in advance,