FUN_ADMIN_PORT_KEY_ADVERT
err = fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_ADVERT, new_advert);
return fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_ADVERT,
FUN_ADMIN_PORT_KEY_ADVERT, FUN_ADMIN_PORT_KEY_MTU
case FUN_ADMIN_PORT_KEY_ADVERT: