1. Buffalo WZR-RS-G54
The device is supported by OpenWRT WhiteRussian-RC4 and later (earlier untested).
The boot_wait NVRAM variable is on by default. Resetting to factory defaults via mtd erase nvram is NOT safe on this unit (applies to Whiterussian RC5 and earlier).
1.1. TFTP installation notes
When installing, make sure you use either openwrt-brcm-2.4-jffs2-4MB.trx (although the device has 8MB FLASH) or openwrt-brcm-2.4-squashfs.trx. Forget about *bin firmwares, device won't accept them.
![/!\](/wiki/classic/img/alert.png "/!\"){kind=small}
Note, the Buffalo WZR-RS-G54 doesn't revert to the 192.168.1.1 address when starting the bootloader, but uses the LAN IP address set in NVRAM. Try this address if you have difficulties.
Note, TFTP server is only running during the bootstrapping sequence. Reboot or powercycle the router just before you do the put.
Send image with TFTP:
tftp 192.168.12.1 tftp> binary tftp> trace tftp> rexmt 1 tftp> put openwrt-xxx-x.x-xxx.trx
LEDs don't work the usual way (Power doesn't blink during flashing). Once restarted, Diag LED will turn on and blink occasionaly, however during boot-up or normal operation of OpenWRT firmware it's always ON. Don't worry about this fact, everything is under control.
1.2. Reverting to original firmware
Download firmware from www.buffalotech.com, unpack the zip. Firmware has some magic header, which has to be stripped off to get TRX image. For the firmware version 2.43 I used this command to strip 37 bytes of rubbish at the beginning of the file:
# dd if=WZR-RS-G54_2.43_1.03-US_US-uclibc of=firmware.trx bs=37 skip=1
Anyway, check that HDR string is directly at the very beginning of the image file. If it's not, firmware image will be rejected.
Once converted to TRX format, the image can be flashed any way - TFTP, by mtd or via web interface.
1.3. Troubleshooting
1.3.1. I erased NVRAM and now I can't access the device
OK, you've done exactly what you were warned not to do... Anyway, there's possibility to revive the thing. All you have to do is to connect to the device via Wifi - IP is 192.168.11.1, SSID is OpenWrt - and login via telnet or SSH. Once in, run these commands:
nvram set wl0_ifname=eth2 nvram set lan_ifname=br0 nvram set lan_ifnames="eth0 eth2" nvram set wan_device=eth1 nvram set wan_ifname=eth1
This will create bridge from LAN an Wifi, WAN will stay separate. Bridge IP is 192.168.11.1 by default, WAN IP is retrieved by DHCP. Current Whiterussian (RC5) doesn't set these values correctly by itself, you have to help it a bit.
2. Original page contents
Retrieve the firmware and decompress it
# mkdir /tmp/buffalo; cd /tmp/buffalo # wget -q http://www.buffalotech.com/downloads/WZR-RS-G54_2%5B1%5D.32_1.00.zip # unzip -q WZR-RS-G54_2\[1\].32_1.00.zip
Determine the correct bs value
# hexdump -C WZR-RS-G54_2\[1\].32_1.00-US_US-TZO-uclibc.00-US_US-uclibc | grep Compressed
000c0030 00 00 00 00 00 43 6f 6d 70 72 65 73 73 65 64 20 |.....Compressed |
000c0050 69 0e f9 84 1a 43 6f 6d 70 72 65 73 73 65 64 00 |i....Compressed.|
offset = 000c0035 (786485)
786485 - 16 bytes = 786469
bs = 786469
Take the calculated bs value and extract the filesystem
# dd if=WZR-RS-G54_2\[1\].32_1.00-US_US-TZO-uclibc.00-US_US-uclibc of=wzr-rs-g54-fs.img skip=1 bs=786469 5+1 records in 5+1 records out
Mount the extracted filesystem
# mkdir /mnt/wzr-rs-g54 # mount -t cramfs -o loop wzr-rs-g54-fs.img /mnt/wzr-rs-g54
A few quick lists + sizes
# cd /mnt/wzr-rs-g54/; ls -lh
total 9.5K
drwxr-xr-x 1 root root 576 Jan 1 1970 bin
drwxr-xr-x 1 root root 0 Jan 1 1970 dev
drwxr-xr-x 1 root root 300 Jan 1 1970 etc
drwxr-xr-x 1 root root 276 Jan 1 1970 hirai
drwxr-xr-x 1 root root 244 Jan 1 1970 lib
drwxr-xr-x 1 root root 332 Jan 1 1970 message
drwxr-xr-x 1 root root 0 Jan 1 1970 mnt
drwxr-xr-x 1 root root 0 Jan 1 1970 proc
drwxr-xr-x 1 root root 416 Jan 1 1970 sbin
drwxr-xr-x 1 root root 0 Jan 1 1970 tmp
drwxr-xr-x 1 root root 64 Jan 1 1970 usr
lrwxrwxrwx 1 root root 7 Jan 1 1970 var -> tmp/var
drwxr-xr-x 1 root root 2.8K Jan 1 1970 www
# du -h ./
3.8M ./usr/sbin
4.0K ./usr/bin
1.4M ./usr/lib
5.1M ./usr
2.5K ./etc/ppp
11K ./etc
512 ./tmp
512 ./dev
512 ./mnt
512 ./proc
320K ./bin
299K ./sbin
205K ./hirai
63K ./message/error
16K ./message/title
20K ./message/wireless
1.0K ./message/lan
7.5K ./message/dhcps
19K ./message/wan
56K ./message/net
9.0K ./message/info
31K ./message/config
18K ./message/other
19K ./message/wanphase
24K ./message/sysinfo
13K ./message/carrier
33K ./message/cwf
7.0K ./message/cwferror
25K ./message/pptps
4.0K ./message/www/bc
670K ./message/www/advance
8.0K ./message/www/omake
8.5K ./message/www/version
945K ./message/www
14K ./message/help/attack
3.0K ./message/help/backup
18K ./message/help/dhcps
8.0K ./message/help/easy
32K ./message/help/filter
53K ./message/help/info
6.0K ./message/help/log
27K ./message/help/nat
5.5K ./message/help/packet
57K ./message/help/pppoe
4.5K ./message/help/rip
7.0K ./message/help/route
6.5K ./message/help/syslog
40K ./message/help/wan
99K ./message/help/wireless
62K ./message/help/pptp
501K ./message/help
1.8M ./message
397K ./www/images
10K ./www/upnp/LAN
65K ./www/upnp/WAN
91K ./www/upnp
1.6M ./www/advance
270K ./www/help
425K ./www/vpn/images
698K ./www/vpn
15K ./www/omake/images
29K ./www/omake
6.0K ./www/version
2.0K ./www/bc
3.4M ./www
33K ./lib/modules/2.4.20/kernel/drivers/net/et
415K ./lib/modules/2.4.20/kernel/drivers/net/wl
594K ./lib/modules/2.4.20/kernel/drivers/net
594K ./lib/modules/2.4.20/kernel/drivers
8.5K ./lib/modules/2.4.20/kernel/net/ipv4/netfilter
9.0K ./lib/modules/2.4.20/kernel/net/ipv4
9.5K ./lib/modules/2.4.20/kernel/net
24K ./lib/modules/2.4.20/kernel/lib/zlib_deflate
24K ./lib/modules/2.4.20/kernel/lib
628K ./lib/modules/2.4.20/kernel
512 ./lib/modules/2.4.20/pcmcia
630K ./lib/modules/2.4.20
630K ./lib/modules
917K ./lib
12M ./