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Linksys WRT54GS v5.0
Linksys WRT54GS
Wireless-G Broadband Router with SpeedBooster




Linksys Routers




Linksys WRT54GS v5.0


Not for 2MB Devices


Not for 2MB Devices


Not for 2MB Devices


Not for 2MB Devices

NOTE: Requires Micro, Do not flash anything else.
NOTE: Requires K2.4, Do not flash anything else.
NOTE: During configuration or flashing a device, the only things that should be hooked to the device is the computer and power.

Works well as a client, client bridge, repeater, repeater bridge. Not enough flash space to make it an optimal gateway.



Serial Num. = CGN7
FCC ID = Q87-WT54GV40
CPU Type = Broadcom BCM5352EKFBG (BCM5352 chip rev 0)
MIPS Rev = ?
CPU Speed = 200MHz
Bus = ?
Flash Type = Parallel
Flash Chip = MX ED60120 29LV160CTTC-70G 2N238700
Flash Size = 2MB
Max Firmware Size = normal cfe (256k) : 1769472 bytes
                    compressed cfe (128k): 1900544 bytes
RAM Size = 16MB
RAM Chip = MIRA P2V28S40BTP 5459FA1R-G6
nvram Size = ?
Switch = Broadcom BCM5352EKFBG (SoC)
Port-based vlan = Yes - Via GUI and nvram with micro-plus-SSH
802.1q vlan = ?
Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN
Wired Standard = IEEE 802.3/3u
boot_wait = ?
bootloader = CFE
Flash Card Socket/Type = No
SD/MMC Mod Support = No
MiniPCI slots = No
PoE = No
Power = 12V/.5A
Color of LEDs = ?
Size = 3.8 x 1.1 x 4.4 inches
USB = No
Serial Port = 2
JTAG Port = Yes
Supported by TJTAG/Version = Yes/3.02
Supported by dd-wrt as of = ?
dd-wrt K2.4 Support = Yes
dd-wrt K2.6 Support = No
Special Features = ?

Radio (wl0)

Wireless Radio = Broadcom BCM2050KML
WLAN DSP processor = Broadcom BCM5352EKFBG (SoC)
Antenna Connector Type = RP-TNC Removable
Wireless Standard = IEEE 802.11b/g
WiFi Operating Frequency = 2.4GHz
 802.11g = 6, 9, 12, 18, 24, 36, 48, 54Mbps
 802.11b = 1, 2, 5.5, 11Mbps
Radio cor_rev = 9
Radio Capabilities = ap sta wet led wme 802.11d 802.11h rm cqa mbss4
                     afterburner acktiming

Links of Interest


These instructions are for the WRT54gS version v.5 and v.6. NOTE THE S. The instructions for the router Wrt54g WITHOUT the S are above.

IN SPITE OF SOME OTHER INSTRUCTIONS ELSEWHERE, YOU REALLY NEED TO CREATE A CUSTOM VX Image for your router. If you don’t you will get a generic mac address on your router and a generic mac address will mean most ISP won’t let you connect to the internet. Here is how to do it properly

There is good information at the scorpiontek site:

Go to this thread and download the zipped files in

  1. Read the peacock announcement found here:
  2. Do a Hard reset or 30/30/30 on the router according to note 1 of the peacock announcement (30/30/30)
  3. Set a static IP on your computer to
  4. Connect the lan cable from your computer to a LAN port of your router. Make sure your router is plugged in.
  5. Unzip the file you downloaded and place it in a location you can easily find on your computer
  6. Unzip the file to the same folder as where you placed the other files you downloaded
  7. Delete the vxworks_prep_v03.bin file
  8. Go to this location and download the vxworks_prep_GS_v03.bin file:
  9. Click on the VXImgToolGui.exe program
    1. Make sure the top button is on the right for WRT54GS, not the left for WRT54G.
    2. Put the mac address from the bottom of your router in the box that says "Desired Mac Address"
    3. Click on the three dots next to "output image" and save the file as My54gsImage.bin in the same folder as everything else is located.
  10. Power cycle the router (uplug the power from the router for 30 seconds and then plug it back in)
  11. Open your browser to but putting that in the browser address window of your browser. You should open the linksys webgui and NOT a page that says Management Mode. If you see management mode, power cycle the router again.
  12. Enter "root" as the username and "admin" as the password
  13. Go to administration and firmware upgrade
  14. Navigate to the folder that you are using, and select vxworks_prep_GS_v03.bin
  15. Hit upgrade.
  16. Wait for FIVE FULL MINUTES. Go for a walk. Don't you TOUCH that router for FIVE MINUTES.
  17. When five full earth minutes have passed, power cycle the router
  18. Refresh your browser window. If you get a blank window, clear your browser cache. NOW you should be in the MANAGEMENT MODE window.
  19. Select the My54gImage.bin file that you created. Hit upgrade.
  20. Wait for the "Upgrade Success" message, and then WAIT FIVE FULL MINUTES again. Don't TOUCH your router.
  21. Start tftp.exe
    1. Enter as the address in the top box of tftp.exe
    2. Leave the password blank
    3. Select the 12548 Newd_Micro.bin firmware
    4. Set retries to 99.
    5. Power cycle the router
    6. Count to 2
    7. Hit upgrade
  22. When you get a success, wait FIVE FULL minutes.
  23. When you can access the dd-wrt webgui using a browser at, power cycle the router.
  24. When you can again access the dd-wrt webgui using a browser at, do another Hard reset or 30/30/30 on the router.
  25. Reset your computer ethernet connection to auto IP and auto DNS
  26. Check for recommended builds here.


If dd-wrt is already on the router follow these instructions. If stock firmware is on the router follow the flashing instructions.

  1. Check for recommended builds here first.
  2. Set your computer to a static IP of (or to whatever subnet the router is on) Disable all firewalls and security. Disable wireless on your computer and only have the router connected to the flashing computer by the ethernet cable between the two.
  3. Hard reset or 30/30/30 (If the router supports it, if not, reset to defults in the GUI) prior to flashing. Wait. Check for password page on re-login and change password.
  4. Flash firmware. You can use the webgui except if you have a belkin router. (For belkin use tftp.exe to flash)
  5. least three minutes. Lights should return to normal. See important2, below. Failing to wait is how most people brick their routers.
  6. Do a power cycle of the router. (Unplug the cord, count to 30 and plug it back in.)
  7. Wait for the lights to return to normal usually about 2 minutes.
  8. Hard reset or 30/30/30 again (If the router supports it, if not, reset to defults in the GUI). Wait. Check for the password page and re-login to change the password. Then you can reconfigure your settings manually.
  9. Once configured set your computer back to autoIP and autoDNS.

Important1: This Hard reset or 30/30/30 works fine for Asus router, but you do have to power cycle after the reset.

Important2: After you flash the firmware, and before you do the hard reset, the router will be building some nvram settings. YOU MUST WAIT FOR THIS TO FINISH PRIOR TO DOING ANYTHING WITH THE ROUTER INCLUDING A HARD RESET. Usually, you can tell when this process is completed by the WAN light coming on, but it does take several minutes. Go have a beer. There are starting to be more and more people who BRICK their routers by not waiting until the nvram is rebuilt, PRIOR to doing a hard reset. YOU NEED TO WAIT!


JTAG/Serial Info


JTAG Pinouts
nTRST   1o o2	GND
  TDI   3o o4	GND
  TDO   5o o6	GND
  TMS   7o o8	GND
  TCK   9o o10	GND
nSRST  11o o12  N/C

Using Universal JTAG Adapter

white    1o o2	 black
  red    3o o4	 GND
 blue    5o o6	 GND
green    7o o8	 GND
yelow    9o o10  GND
orange  11o o12  N/C
  • /noemw /nocwd switches required
JTAG Recovery


  1. Backup CFE x2 (Compare the files, they must match exactly or there is something wrong with your JTAG setup)
  2. Erase Wholeflash x2
  3. Flash CFE
  4. Unplug Power
  5. Unplug JTAG Cable


  1. Set Rig ip static
  2. Plug network cable from rig to port 1
  3. Get TFTP ready, server ip -, Password - blank, file - dd-wrt.v24_micro_generic.bin
  4. Plug in power
  5. As soon as windows says "connected" hit upgrade. May have to use a network hub to make sure windows is always connected.
  6. Hard Reset 30\30\30


Serial Pinouts
VCC  1 o o 2  VCC
TX1  3 o o 4  TX0
RX1  5 o o 6  RX0
N/C  7 o o 8  N/C
GND  9 o o 10 GND

Hyper terminal Setup in Windows XP
In Windows XP, Click Start Button - All Programs - Accessories - 
   Communication - HyperTerminal
Enter a name for the connection, Click ok
Choose com port you adapter is plugged into, Click ok
 Bits per second = 115200
 Data Bits = 8
 Parity = none
 Stop bits = 1
 Flow control = none
Click ok
Click File - Save As, and select a place to save it to so you 
             don't have to enter the settings again.
Putty Setup in Windows XP
After installing putty, run it
 Serial line = The COM port your using for serial (ie. COM3)
 Speed = 115200
Click on Serial under Connection
 Serial line to connect to = same as above (Serial line)
 Speed (baud) = 115200
 Data bits = 8
 Stop bits = 1
 Parity = None
 Flow control = None
Click Session
 Enter a name for your connection under saved sessions
Click Save
Click Open
Serial Recovery

Modified Redhawk0 instructions

  1. Connect Serial cable
  2. Start one of the programs from above
  3. Get TFTP ready with file selected
  4. Use dd-wrt.v24_micro_generic.bin
  5. Connect power to the router
  6. start a rapid fire Cntl-C as you plug the router to power
  7. type "nvram erase" w/o quotes, hit enter
  8. type "flash -noheader : flash1.trx" w/o quotes, this starts the tftp daemon, hit enter
  9. but have tftp.exe ready
  10. Click go or start on TFTP
  11. give it 5 minutes after it finishes
  12. then power cycle....hard reset...then config
  13. when it stops spitting out txt in the serial consol....hit the enter should get a login that point, power cycle it, Hard reset or 30/30/30...then config
  14. you'll see it boot up

vlan Info

I can confirm that the WRT54GS v5.0 supports port based vlans via the GUI with 14929 micro. I will flash a micro plus SSH, retest via nvram and update this post.

vlans via nvram on 14848 NEWD micro plus confirmed.

WRT54GS v5.0's ports are mapped like this:

4 3 2 1 | case labels
3 2 1 0 | nvram port numbers

"/proc/switch/eth0" does exist


root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 17563 bytes (15205 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
size: 17563 bytes (15205 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
size: 17563 bytes (15205 left)


root@DD-WRT:~# nvram set vlan0ports="2 1 0 5*"
root@DD-WRT:~# nvram set vlan1ports="3 4 5"
root@DD-WRT:~# nvram commit
root@DD-WRT:~# reboot


root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=2 1 0 5*
vlan1ports=3 4 5
size: 17826 bytes (14942 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
size: 17826 bytes (14942 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
size: 17826 bytes (14942 left)
root@DD-WRT:~# lsmod
Module                  Size  Used by
ip_nat_pptp             2192   0 (unused)
ip_conntrack_pptp       2524   1
ip_nat_proto_gre        1552   0 (unused)
ip_conntrack_proto_gre    2312   0 [ip_nat_pptp ip_conntrack_pptp]
switch-robo             5036   0 (unused)
switch-core             5984   0 [switch-robo]
root@DD-WRT:~# ls /proc/switch
root@DD-WRT:~# cat /proc/switch/eth0/vlan/0/ports
0       1       2       3       5t*
root@DD-WRT:~# cat /proc/switch/eth0/vlan/1/ports
4       5t
root@DD-WRT:~# cat /proc/switch/eth0/vlan/2/ports
4root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 17280 bytes (15488 left)


WRT54GSv50a WRT54GSv50b WRT54GSv50c

WRT54GSv50d WRT54GSv50g WRT54GSv50e


FCC Pictures


Hardware Modification

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