MikroTik RouterBoard RB91xG 5HPnD (RB911/RB912)
There appears to be a new revision of this board, which has an ethernet problem https://dev.openwrt.org/ticket/17385. It is distinguishable by the NANYA DDR memory on board. The ticket was closed on 2015-06-25. Ethernet is now reported working on Chaos Calmer.
Hardware
CPU | CPU Speed | RAM (MByte) | NAND (MByte) | Serial Flash | Ethernet | PoE | Wireless | USB | UART | JTAG |
---|---|---|---|---|---|---|---|---|---|---|
AR9342 | 600 MHz | 64 (NT5TU32M16DG–AC) | 128 (Samsung K9F1G08U0D-SCB0) | MX25L512E | AR8033 (10M/100M/1000M) | 8-30V 14W at 24V | AR9342-BL1A | 1x 2.0 | 1x onboard no pins | 1x onboard? |
Photos
Switch between mPCIe and USB slot with some Mikrotik devices
With this board you need to choose between mPCIe and USB slot. You cannot use both at the same time.
You can check this with command:
$ uci show system.usb_power_switch
Result will be something like this:
system.usb_power_switch=gpio_switch system.usb_power_switch.name='USB Power Switch' system.usb_power_switch.gpio_pin='52' system.usb_power_switch.value='1'
system.usb_power_switch.value is the switch.
- value='1', USB port enabled, mPCIe slot disabled.
- value='0', mPCIe slot enabled, USB port disabled.
To change this type:
$ uci system.usb_power_switch.value='0' $ uci commit system
This will enable mPCIe slot and disable USB port. Then just reboot, and your mPCIe card should be recognized.
OpenWrt Installation
Create image
$ mkdir /home/$USER/mikrotik/ $ cd /home/$USER/mikrotik/ $ svn co svn://svn.openwrt.org/openwrt/trunk/ $ cd /home/$USER/mikrotik/trunk
Configure image for booting from RAM and NAND, enable regdomain set
$ make menuconfig
Target System = AR7XXX
Subtarget = Mikrotik device with NAND flash
Target Images = choose ramdisk and tar.gz
Kernel modules → Wireless Drivers → kmod-ath Atheros common driver part →
enable Force Atheros drivers to respect the user's regdomain settings (CONFIG_ATH_USER_REGD)
$ make kernel_menuconfig CONFIG_TARGET=subtarget
Machine selection
System type = Atheros AR71XX/AR724X/AR913X based boards
Atheros AR71XX/AR724X/AR913X machine selection - enable MikroTik RouterBOARD 91X support
$ make V=s
Run OpenWrt in RAM
Create script: nano /tftp/loader.sh
#!/bin/bash USER=user #CHANGE THIS ifconfig eth0 192.168.1.10 up dnsmasq -i eth0 --dhcp-range=192.168.1.100,192.168.1.200 \ --dhcp-boot=openwrt-ar71xx-mikrotik-vmlinux-initramfs.elf \ --enable-tftp --tftp-root=/home/$USER/mikrotik/trunk/bin/ar71xx/ -d -u $USER -p0 -K --log-dhcp --bootp-dynamic
- Run script loader.sh from root/sudo
- Unplug power jack from PoE injector
- Hold reset button
- Plug power jack
- Release the reset button after the 6 LEDS stopped blinking and all 6 LED lights turned off
- The router is now in network boot mode
Your RB91x should fetch an DHCP lease, load the initramfs image via tftp from your local machine and boot into OpenWrt. After a short beep the router should be reachable via IP: 192.168.1.1
NOTE: Sometimes board uses default IP range: 192.168.88.x. This happens especially, when you have soft bricked the board. Then you must modify the script and replace 192.168.1.x with 192.168.88.x.
Flash OpenWrt to Mikrotik
The new & easy way to flash Openwrt/LEDE permanently
Once your router has booted the initramfs image and is accessible via ssh root@192.168.1.1, just:
- copy the sysupgrade image via scp into the routers /tmp folder
scp lede-ar71xx-mikrotik-nand-large-squashfs-sysupgrade.bin root@192.168.1.1:/tmp * ssh into our router and trigger a normal sysupgrade
ssh root@192.168.1.1 root@LEDE:sysupgrade /tmp/lede-ar71xx-mikrotik-nand-large-squashfs-sysupgrade.bin
The old way to flash an image
To flash openwrt-ar71xx-nand-vmlinux-lzma.elf you must login to router via telnet 192.168.1.1
and then copy OpenWrt image to /tmp/
Find kernel
and rootfs
partitions from /proc/mtd
root@OpenWrt:/# cat /proc/mtd dev: size erasesize name mtd0: 0000b000 00001000 "routerboot" mtd1: 00001000 00001000 "hard_config" mtd2: 00001000 00001000 "bios" mtd3: 00001000 00001000 "soft_config" mtd4: 00040000 00020000 "booter" mtd5: 003c0000 00020000 "kernel" mtd6: 07c00000 00020000 "rootfs"
Erase them, there may be bad blocks detected and skipped during erase
root@OpenWrt:/# mtd erase /dev/mtd5 root@OpenWrt:/# mtd erase /dev/mtd6 root@OpenWrt:/# mkdir /mnt/kernel root@OpenWrt:/# mkdir /mnt/rootfs root@OpenWrt:/# mount /dev/mtdblock5 /mnt/kernel root@OpenWrt:/# mount /dev/mtdblock6 /mnt/rootfs
Change password to enable ssh
root@OpenWrt:/# passwd
Copy kernel & rootfs to RB91x
$ cd /home/$USER/mikrotik/trunk $ scp bin/ar71xx/openwrt-ar71xx-mikrotik-vmlinux-lzma.elf root@192.168.1.1:/tmp $ scp bin/ar71xx/openwrt-ar71xx-mikrotik-DefaultNoWifi-rootfs.tar.gz root@192.168.1.1:/tmp
Flash kernel & rootfs
root@OpenWrt:/# mv /tmp/openwrt-ar71xx-mikrotik-vmlinux-lzma.elf /mnt/kernel/kernel root@OpenWrt:/# chmod +x /mnt/kernel/kernel root@OpenWrt:/# umount /mnt/kernel root@OpenWrt:/# tar -C /mnt/rootfs -xvzf /tmp/openwrt-ar71xx-mikrotik-DefaultNoWifi-rootfs.tar.gz root@OpenWrt:/# umount /mnt/rootfs
Stop loader.sh and finally
root@OpenWrt:/# reboot
After reboot you should be able to login via telnet 192.168.1.1