In article <200411191357.03688.ritashen@xxxxxxxxxxxxxxx> you wrote: > More detail about change the queue length, I don't think simply input the > command will do:-( >From the ifconfig man page: txqueuelen length Set the length of the transmit queue of the device. It is useful to set this to small values for slower devices with a high latency (modem links, ISDN) to prevent fast bulk transfers from disturbing interactive traffic like telnet too much. However, never tried it with TUN/TAP, let me know if I need to add anything to the man page. Greetings Bernd - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html