int ctc_change_mtu (struct net_device * dev, int new_mtu);
param dev Pointer to interface struct. param new_mtu The new MTU to use for this interface.
return 0 on success, -EINVAL if MTU is out of valid range. (valid range is 576 .. 65527). If VM is on the remote side, maximum MTU is 32760, however this is <em>not</em> checked here.