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Hosed my WRT54G Can I reload firmware

Discussion in 'Cisco/Linksys Wireless Routers' started by mdbill2006, Oct 31, 2005.

  1. mdbill2006

    mdbill2006 Network Guru Member

    Somehow, while playing with the firmware on my WRT54G I must have killed the firmware. I cannot obtain and IP address to reflash it. Is there anyway to fix this unit.

    Also,,, how can I tell what version the unit is?
  2. krazyme

    krazyme Network Guru Member

    Had the same problem this week-end, found a solution, you might want to take a look here : Firmware problem topic

    To know the version, it's easy :

    The first 4 digits in the serial number (look on the box or the underside of the router) represent the hardware revision:

    CDF0 = WRT54G v1.0
    CDF1 = WRT54G v1.0
    CDF2 = WRT54G v1.1
    CDF3 = WRT54G v1.1
    CDF5 = WRT54G v2.0
    CDF7 = WRT54G v2.2
    CDF8 = WRT54G v3.0
    CDF9 = WRT54G v3.1
    CDFA = WRT54G v4.0
    CDFB = WRT54G v5.0

    CGN0 = WRT54GS v1.0
    CGN1 = WRT54GS v1.0
    CGN2 = WRT54GS v1.1
    CGN3 = WRT54GS v2.0
    CGN4 = WRT54GS v2.1
    CGN5 = WRT54GS v3.0
    CGN6 = WRT54GS v4.0

    Good luck, keep trying, you will work that out
  3. mdbill2006

    mdbill2006 Network Guru Member


    Thank you crazyme.. I tried all you have given me, but still cannot obtain an IP address to get to the router... Yes, I was in the process of an upgrade, probably using the wrong firmware that got me in this trouble.

    Is the bottom line, without an IP address from the router, there is no way to fix this problem?
  4. krazyme

    krazyme Network Guru Member

    Normally no, sorry
  5. kublai

    kublai Network Guru Member

    this will work

    do an indefinite ping to your router ie
    command prompt
    ping -n 9999

    hold reset button
    if you bricked your router you will most likely get like 2-3 responses before it times out again... if you get this have the tftp utility ready to transfer with your STOCK FIRMWARE and then try holding the reset button again... as soon as you get a response send the file right away
    if you get a success w/ tftp utility give router 2-3 minutes to cycle and then reset it again... congratulations you have unbricked your router

    If the above does not work.... your problem is a bit complicated and you will have to short pins 15/16 inside your router while doing an indefinite ping... then tftp'ing the image( http://www.linksysinfo.org/modules.php?name=Content&pa=showpage&pid=33 ) explains the process well.

    Enjoy a nonbricked router... I had fun doing both of these operations on multiple WRT54G's.... haven't had one completely lost yet!


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