RouterBOARD 411 Series User's Manual
x - exit setup
your choice:
To select a menu point, press the indicated key. Pressing [Enter] selects the option marked with '*'.
Configurable Options
boot delay – how much time to wait for a key stroke while booting (1..9 seconds; 2 second by default).
boot key – which key will cause the loader to enter configuration mode during boot delay (any key |
<Delete> key only; any key by default). Note that in some serial terminal programs, it is impossible to use
the [Delete] key to enter the setup – in this case it might be possible to do this with the [Backspace] key.
serial console – to configure initial serial console bitrate (1200 | 2400 | 4800 | 9600 | 19200 | 38400 |
57600 | 115200; 115200 bps by default).
boot device – initial boot device (boot over Ethernet | boot from NAND | boot Ethernet once, then NAND;
boot from NAND by default). You can also select boot chosen device option to boot from the device
selected immediately, without saving the setting.
cpu mode – whether to enter CPU suspend mode on WAIT instruction (power save | regular; power save
by default). Most OSs use WAIT instruction during CPU idle cycle. When CPU is in suspend mode, it
consumes less power, but in low-temperature conditions (below 0°C) it is recommended to choose regular
mode, so that overall system temperature would be higher.
reset configuration – whether to reset all the boot loader settings to their respective default values (yes |
no; no by default).
format nand – perform a low-level NAND format. During this operation, all previously marked bad sectors
are retested to find out if they are faulty indeed.
upgrade firmware – receive a new boot loader image using XModem protocol over serial line or using
DHCP/BOOTP and TFTP protocols through the Ethernet network (upgrade firmware over ethernet | upgrade
firmware over serial port).
board info – prints the serial number, boot loader version, CPU frequency, memory size and MAC addresses
of the onboard Ethernet ports
boot protocol – network booting protocol (bootp protocol | dhcp protocol; bootp protocol by default).
do memory testing – performs a full memory test.
Boot Loader Upgrading
The boot loader is needed to initialize all the hardware and boot the system up. Newer loader versions might
have support for more hardware, so it's generally a good idea to upgrade the loader once a newer version is
available. You can upgrade the loader through the onboard serial port using XModem protocol (programs
available for all major OSs). For example, you can use HyperTerminal for Windows or Minicom for Linux to
upload the boot loader. Alternatively if you have a DHCP/BOOTP and TFTP servers available, you can specify
the loader image as a boot image and choose the bios upgrade over ethernet option in the boot loader
configuration menu. The loader will get the image from the TFTP server and upgrade itself. The most current
loader image is available for download on www.routerboard.com.
The boot loader upgrading is supported also from MikroTik RouterOS. The procedure is described in the
MikroTik RouterOS manual.Appendix
Serial Null-modem (Console) Cable with Loopback
DB9f Function DB9f DB25f
1 + 4 + 6 CD + DTR + DSR N/C N/C
N/C CD + DTR + DSR 1 + 4 + 6 6 + 8 + 20
2 RxD 3 2
3 TxD 2 3
5 GND 5 7
7 + 8 RTS + CTS N/C N/C
N/C RTS + CTS 7 + 8 4 + 5
7
(10 pages)
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