Try this version of usbnetwork script:
Code:
#!/bin/sh
# Teweak these to match your setup
HOST_IP=192.168.2.1
KINDLE_IP=192.168.2.2
U=/mnt/us
R=$U/usbnet
# Check if we already have ethernet gadget driver running
lsmod | grep g_ether > /dev/null && exit 2
# Unload mass storage gadget and load ethernet one
rmmod g_file_storage || exit 1
rmmod arcotg_udc || exit 1
modprobe arcotg_udc force_fs=1
modprobe g_ether host_addr='EE4900000000' dev_addr='EE1900000000' || exit 1
ifconfig usb0 ${KINDLE_IP} || exit 1
#route add default gw ${HOST_IP}
# start telnet & ssh daemons
$R/busybox telnetd
$R/dropbear