RB433 and RB433AH are rather similar boards, except for the microSD slot (RB433AH only), CPU frequency (300 vs. 680 MHz) and RAM size (64 vs. 128 MB). RB433UAH adds USB connector and 5V DCDC to power USB devices to RB433AH.
UAH is the same board as AH, but with USB-connectors and dc/dc for 5V USB assembled. Adding unpowered USB to other boards could be easy, just solder in connector or simply wires.
The MicroSD Slot needs SPI-Bus sharing support, which is not implemented in Backfire.
SPI-Bus sharing has been implemented in Trunk r22862 the MicroSD Slot is usable now. Read speed ist about 0.92 MB/s (11/13/10: I get I/O and -89 errors on the SPI bus while assessing the microSD card).
Here are the three main steps of the installation:
- Boot the board on OpenWrt from the network (netboot): DHCP and TFTP servers required on the host.
- Install OpenWrt to the internal flash with wget2nand: HTTP or FTP server required on the host.
- Reboot on the new installation, configure, etc.
The bootloader of RB433 is able to load an image in elf format via BOOTP into RAM and execute it.
You need to get OpenWrt trunk. In menuconfig choose:
- Target System: Atheros AR7xxx/AR9xxx
- Subtarget: Devices with NAND flash (mostly Mikrotik)
- Target Images: ramdisk (and also tar.gz if you plan to do a permanent install with the same image)
Now build the ram disk version. While it's building create the tftp-root directory if not already done and a symlink to the ram disk image
sudo mkdir -p /tftpboot sudo ln -sf $(HOME)/openwrt/rb433uah-netboot/bin/ar71xx/openwrt-ar71xx-nand-vmlinux-initramfs.elf /tftpboot/openwrt.elf
You need a BOOTP and a TFTP server on your host machine, we use
dnsmasq here, since it can provide both services. Install dnsmasq with:
sudo apt-get install dnsmasq
Changes in /etc/dnsmasq.conf:
- only listen on the interface which is directly connected to the RouterBoards WAN (PoE) port. e.g.
- allow a DHCP range, e.g.
- allocate an IP address to the board, e.g.
dhcp-host=00:0C:42:XX:XX:XX,192.168.6.101(replace the XX with the MAC address of your board!)
- enable dnsmasq's built-in TFTP server
- set the root directory for files available via FTP.
- set filename (produced above) and tftpd server for BOOTP, e. g.
Finally restart dnsmasq
sudo /etc/init.d/dnsmasq restart
You will probably need to set the IP of the interface manually:
sudo ip addr add 192.168.6.1/24 dev eth0
- Connect to the serial port with a null modem cable (115200, 8N1).
- Press a key shortly after powering the board.
- Press o to change the boot device
- Press e to boot from ethernet in the future.
- Press x to leave setup (-o-e-x is needed only once, the boot method is saved in non-volatile memory)
If everything is setup correctly it should look like:
RouterBOOT booter 2.16 RouterBoard 433AH CPU frequency: 680 MHz Memory size: 128 MB Press any key within 2 seconds to enter setup.. trying bootp protocol.......... OK Got IP address: 192.168.6.101 resolved mac address 4E:80:00:00:00:00 Gateway: 192.168.6.1 transfer started ................................... transfer ok, time=7.16s setting up elf image... OK jumping to kernel code Linux version 126.96.36.199 (joerga@thinkpad) (gcc version 4.1.2) #2 Mon Nov 10 11:23:37 CET 2008 console [early0] enabled ...
You need a working netboot first, see above. Please note also that you cannot reflash from a previous OpenWrt installation, you need the netboot in any case.
If you want to use the same trunk image as the netboot image (cf. above), you need to have the tar.gz target selected in the Target Images menu and rebuild if you didn't select it before. You can also use one of the pre-built images (tested with 12.09-rc2); in the download area, browse the
ar71xx/nand/ directory and pick the two following files:
If you don't have many devices to install and your netbooted system can access the Internet, you can probably pass the download URL directly to wget2nand as well, that will save you the web server configuration step (see below).
If you have access to the MikroTik's Winbox software, you can export the license file from System→Licence, as stated on the RouterBoard 411 page.
Otherwise, boot RouterOS and export the key to a file:
/system license output
Then list the files on your device to see which file the .key file was saved:
On a fresh install, the key file should be #1 (or #0 on a RB433UAH); to open the editor with file #1, type:
/file edit 1 value-name=contentsThen copy-paste the text in a file on your computer. The differences between the obtained key file and a key exported with Winbox are that the SoftwareID line is not present in the latter, and there are no empty lines, so you should probably delete all the empty lines in your file prior to import it for a new installation; the SoftwareID line should not bother the installer (untested).
If you want to install OpenWrt permanently into the NAND flash you once need to erase the NAND flash to get rid of the RouterOS stuff:
- connect via serial line
- press a key shortly after powering the RB433 up
- press e and type yes to format the flash from the bootloader
An HTTP web server is required on the host, e.g. mini-httpd in Ubuntu. Install the mini-httpd web server
sudo apt-get install mini-httpd
- Start daemon
- On which host mini_httpd should bind
- Run in chroot mode
- Where are the web files stored
Restart the mini-httpd web server
sudo /etc/init.d/mini-httpd restart
- Start netboot (see above).
- Press ENTER to get a shell prompt.
This script will set an IP address via dhcp on br-lan. The output should look like:
root@OpenWrt:/# wget2nand http://192.168.6.254 Connecting to 192.168.6.254 (192.168.6.254:80) kernel 100% |*******************************| 1041k 0:00:00 ETA Connecting to 192.168.6.254 (192.168.6.254:80) rootfs.tgz 100% |*******************************| 4243k 0:00:00 ETA Erasing filesystem... [ 137.110000] nand_erase_nand: attempt to erase a bad block at page 0x00002240 [ 137.140000] nand_erase_nand: attempt to erase a bad block at page 0x00003ac0 [ 137.180000] nand_erase_nand: attempt to erase a bad block at page 0x00005d40 [ 137.620000] nand_erase_nand: attempt to erase a bad block at page 0x00026a80 [ 137.850000] nand_erase_nand: attempt to erase a bad block at page 0x000373c0 [ 137.860000] nand_erase_nand: attempt to erase a bad block at page 0x00037440 [ 138.000000] yaffs: dev is 32505861 name is "mtdblock5" rw [ 138.000000] yaffs: passed flags "" [ 138.020000] yaffs: dev is 32505862 name is "mtdblock6" rw [ 138.020000] yaffs: passed flags "" Mounting /dev/mtdblock6 as new root and /dev/mtdblock5 as kernel partition Copying kernel... Preparing filesystem... ./ ./tmp/ ./usr/ ./usr/lib/ ./usr/lib/opkg/ … ./proc/ ./sys/ ./www/ ./root/ ./var Cleaning up... Image written, you can now reboot. Remember to change the boot source to Boot from Nand
- Reboot the RB433 and change the boot source to NAND.
The ethernet jacks are mapped to port numbers of the IP175C switch (looking at the front of the board):
[ port 4 (PoE)] ( serial ) [port 1] [port 2]
|eth1||1 & 2|
Port 1 and port 2 are switched in the default config.
toh/mikrotik/rb433.txt · Last modified: 2014/02/13 07:03 by hhm