The following patch works fine on my system. I tried to ifconfig up & down many times and nothing strange occurs. Please try it and let me now . Stefano Corti - IZ0BBZ Internet mail: [EMAIL PROTECTED] AX25 mail: [EMAIL PROTECTED] --- /usr/src/linux/net/ax25/af_ax25.c Sun Jun 20 13:49:07 1999 +++ /usr/src/linux/net/ax25/af_ax25.c Sun Jun 20 11:42:49 1999 @@ -200,6 +200,9 @@ if (s->ax25_dev == ax25_dev) { s->ax25_dev = NULL; ax25_disconnect(s, ENETUNREACH); + ax25_stop_heartbeat(s); + ax25_remove_socket(s); + ax25_clear_queues(s); } } }