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toh:mikrotik:rb91xg_5hpnd

MikroTik RouterBOARD 91xG 5HPnD (RB911/RB912)

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?

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

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
  • After LEDS stopped blinking release reset button

Your RB91x should boot into OpenWRT with IP 192.168.1.1

Flash OpenWRT to Mikrotik

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

About: http://routerboard.com/RB912UAG-5HPnD http://img.routerboard.com/mimg/884_hi_res.png Helpfull info: https://dev.openwrt.org/log/trunk/target/linux/ar71xx/patches-3.10/703-MIPS-ath79-add-RB91x-support.patch

toh/mikrotik/rb91xg_5hpnd.txt · Last modified: 2014/07/06 10:07 by voron