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Linksys WRT54GS v1.1
Linksys WRT54GS
Wireless-G Broadband Router with SpeedBooster




Linksys WRT54GS




Linksys WRT54GS v1.1


Linksys WRT54GS




Support Chart at Bottom



NOTE: Resetting to factory defaults via reset button or mtd erase nvram is safe on this unit.
NOTE: These unit seems to run more stable on the VINT builds.NEWD or VINT
NOTE: Requires K2.4, Do not flash anything else.
NOTE: During configuration or flashing a device, the only that should be hooked to the device is the computer and power.

Makes a great main router (gateway), will also work as a client, client bridge, repeater, repeater bridge.



Serial Num. = CGN2
FCC ID = Q87-WT54GV22
CPU Type = Broadcom BCM4712LKFB (BCM4712 chip rev 1 SoC)
MIPS Rev = R1
CPU Speed = 200MHz
Bus = ?
Flash Type = Parallel
Flash Chip = Intel TE28F640 J3C120 A4287026
Flash Size = 8MB
Max Firmware Size = 7995392 bytes
RAM Size = 32MB
RAM Chip = hynix 435U HY5DU561622DT-J
nvram Size = ?
Switch = Broadcom BCM5325EKFBG (BCM5325E)
Port-based vlan = Yes - Via GUI & nvram
802.1q vlan = ?
Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN
Wired Standard = IEEE 802.3?
boot_wait = Off
bootloader = CFE
Flash Card Socket/Type = No
SD/MMC Mod Support = No
MiniPCI slots = No
PoE = No
Power = 12V/1A
Color of LEDs = ?
Size = 7.32" x 1.89" x 6.06"
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
Supported by TomatoUSB as of = 54/All (8MB flash)
TomatoUSB K2.4 Support = Yes
TomatoUSB K2.6 Support = Yes
Special Features = ?

Radio (wl0)

Wireless Radio = Broadcom BCM2050KML 
WLAN DSP processor = Broadcom BCM4712LKFB (BCM4712 chip rev 1 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 = 7
Radio Capabilities = ap sta wet led wme 802.11d 802.11h rm cqa
                     afterburner acktiming

Links of Interest



WRT54GS v1.1 uses the Broadcom BCM4712 chip rev 1 but since the "wl0_corerev" is 7 (see NEWD or VINT for more info) WRT54GS v1.1 users should use standard NEWD builds

How to Flash

Make sure to get all the files you need first. Start with dd-wrt.v24_mini_generic.bin

  1. Perform a Hard reset or 30/30/30
  2. Upload dd-wrt through the firmware update page
  3. WAIT for at least five minutes before you continue! (longer is better) Give the router plenty of time to to boot.
  4. Perform a Hard reset or 30/30/30
  5. WAIT for at least five minutes before you continue! (longer is better) Give the router plenty of time to to boot.
  6. Power Cycle
  7. Open your browser to Configure to your liking. Enjoy.
  8. 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!


  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 Subnet mask should be
  4. Connect the lan cable from your computer to a LAN port of your router. Make sure your router is plugged in. Nothing should be connected to your computer or the router except the LAN cable between them. Turn your firewall and any wireless computer connections OFF.
  5. Power cycle the router (uplug the power from the router for 30 seconds and then plug it back in)
  6. Open your browser to by 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.
  7. Enter your username and password
  8. Go to administration and firmware upgrade
  9. Navigate to the folder that you are using, and select WRT54GSv3_4.71.4.001_fw.bin once you've unzipped it.
  10. Hit upgrade
  11. When you get a success, wait FIVE FULL minutes.
  12. When you can again access the Linksys webgui using a browser at, do another Hard reset or 30/30/30 on the router.
  13. Reset your computer Ethernet connection to auto IP and auto DNS

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 switch required for flash
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_mini_generic.bin
  4. Plug in power
  5. Wait for DMZ light to do a steady pulse, When it is lit on the 3rd time click upgrade. The DMZ light must be lit when you click upgrade.
  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
Fixme This section is in need of Serial Recovery Instructions!

vlan Info

Confirmed the WRT54GS v1.1 supports port-based vlans via the GUI & nvram.

WRT54G v1.1's ports are mapped like this:

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


root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 19244 bytes (13524 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
size: 19244 bytes (13524 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
size: 19244 bytes (13524 left)
root@DD-WRT:~# lsmod
Module                  Size  Used by
ip_nat_pptp             2560   0 (unused)
ip_conntrack_pptp       3036   1
ip_nat_proto_gre        1664   0 (unused)
ip_conntrack_proto_gre    2584   0 [ip_nat_pptp ip_conntrack_pptp]
etherip                 5104   0 (unused)
switch-robo             5356   0 (unused)
switch-core             6352   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


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: 19365 bytes (13403 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
size: 19365 bytes (13403 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
size: 19365 bytes (13403 left)


root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 19348 bytes (13420 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
port4vlans=1 18 19
port3vlans=0 18 19
port2vlans=0 18 19
port1vlans=0 18 19
port0vlans=1 18 19
size: 19348 bytes (13420 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
size: 19348 bytes (13420 left)


WRT54GSv11a WRT54GSv11b WRT54GSv11c

WRT54GSv11e WRT54GSv11f Wrt54gsv11 sd

FCC Pictures


Other Notes

[comment added 4/25/08 by WellingtonFelix] I installed the new version "dd-wrt.v24_mega_generic.bin" over default configuration of the version "dd-wrt.v23_vpn_generic.bin" and I had no problems.

[comment added 5/7/08 by Sapremias] Flashed dd-wrt.v24_mega_generic.bin directly from linksys web interface (version WRT54GSv3_4.71.4.001_fw.bin) without issue. -Sapremias

[comment added 10/5/08 by richwillal] I installed dd-wrt v24 sp1 Mega Vintage (dd-wrt.v24-9517_VINT_mega) from stock firmware with no issues. Standard process: 1) Reset router - reset for 30 secs w/ power on 2) Upload dd-wrt 3) Reset router - reset for 30 secs w/ power on 4) Disconnect/reconnect or ipconfig /renew

[comment added 04/02/09 by tribble222] I nearly bricked my router going directly from Linksys firmware to dd-wrt.v24-11296_VINT_STD.bin. Pinged on boot but tftp wouldn't work. Router didn't even respond to JTAG. Shorting pins 5&6 with the router unplugged somehow fixed everything. From there I was able to flash to mini, then back to std.

Hardware Modification

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