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Setting up a WRT54GX2 on an existing network

Discussion in 'Cisco/Linksys Wireless Routers' started by Brian092765, Feb 7, 2006.

  1. Brian092765

    Brian092765 Network Guru Member

    Good day to you...

    I am attempting to setup a WRT54GX2 on an existing network but unable to do so.

    The reason for this is that I have a user that is on a different floor and has only ONE network drop. The way he is setting up, it is not feasible for him to have a hard-wired switch as his office is actually a suite with multiple rooms. He has a latop with wireless capabilities and he also wants a wireless print server installed and I cannot configure until I get the WRT54GX2 configured.

    I need the router disabled as a DHCP Server and have it be able to pass through IP addresses assigned by the network. The IP addresses start at 10.0.1.X.

    For the wireless print server to work, it has to be on the same subnet as the router.

    Any assistance would be appreciated... :eek:
  2. howardp6

    howardp6 Network Guru Member

    Did you disable NAT under advanced routing and connect the WRT54GX2 from one of its LAN ports to a LAN port on the existing router.
  3. Brian092765

    Brian092765 Network Guru Member

    Got it.

    That works now. Heck, I even got the wireless print server to work with it.

    Thank you...
  4. bummpr

    bummpr Network Guru Member

    Thanks for the info but I have a similar network setup but I have problems with this setup as you described above...I can't see the WRT on our network scan to be able to administer.

    I have a main network in the range of - I want to assign a permanent IP ( to the WRT so that I can administer the box so I used this number as the static IP of the Internet/WAN port of the WRT. The WRT setup forced me to put the WRT on a different LAN segment (so I chose for the WRT LAN IP).

    No matter what I do, either I can get the WRT to a) work to connect to the internet or b) able to be recognized on my local LAN. But, I can't get both accomplished at the same time.

    HELP...what IP's (or other settings) do I have to use for the AP to work on my company network???

    Thanks for any help anyone can provide!!!
  5. Brian092765

    Brian092765 Network Guru Member

    To be able to administer the router, you have to unplug the network cable that goes to your existing network. You should only have a network cable attached from your computer to one of the switch ports. Reboot your computer. Login to the Router using the

    That is the only way I know how to do it.

    Maybe someone else can chime in???
  6. bummpr

    bummpr Network Guru Member

    I hope this is not true Brian...but you apparently have run into the same restriction...right?

    Can anyone else help us with this problem???
  7. howardp6

    howardp6 Network Guru Member

    If you cannot get the WRT54G to assign an address of, then you are on a different subnet and will not be able to access the router. Try setting up a routing table to in advanced routing.
  8. frankieg

    frankieg Network Guru Member


    If I understand your config: You have your existing network 10.0.0.x. You want to add the WRT simply to act as an Access Point, to provide nwk access for wireless clients. Your network has its Internet router somewhere else (typically would be

    Then, first thing to consider is that you don't want the WRT to perform as a router. So, FORGET about the WAN port; it’s useless for you; you can even put a sticker on it.

    Connect the WRT to your net using any of the 4 LAN ports. Depending on your switch, you might need a crossover cable.
    You can most probably forget about the 3 spare LAN ports too (unless you want to use it as a local switch for some PCs in the nearby)

    Next, assign IP to the WRT LAN side

    Disable NAT, under Routing. And leave static routes as they are, with the default route defined by the system.

    Now you should be done for the basic setup. You can connect from you LAN to and administer the WRT.

    Wireless client devices should define as their Default Gateway your network’s main Default Gateway (the Internet router), not the WRT. The WRT acts as a bridge between the wired-wireless worlds, forwarding packets as needed, but doing no routing.

    A note about DHCP: You might have some other device (eg. the Internet router) on your nwk acting as a DHCP server, so you’d better disable DHCP on the WRT itself, to avoid conflicts with the main DHCP server.

    I have a configuration like this working in our office. It does the basic connectivity for our wireless devices.

    But I still have a problem: My WRT is unable to get the time from the Internet. It is always working from Jan, 1st. 2000.

    It is probably because the WRT (itself) doesn’t know which the Internet router IP is, so it can’t get out, and there is no way to enter it, as far as I know. It looks that WRT54GX (v2) is only intended to work as the main Internet router but not as a simple Access Point in a network where the Internet router is somewhere else.

    I think I'd better open a new thread with this issue
  9. bummpr

    bummpr Network Guru Member

    I think I tried this

    I think you understand my problem exactly.

    I also believe I have tried the configuration you suggested...I've tried every possible combination at least 3 times over the last year trying to get a regular WRT54G and GS working in this situation...I think my reset buttens are about to quit working. :D

    I have also made sure to turn remote configuaration ON and also disabled the firewall.

    I'm at home right now but I recall that the setup you suggested did allow me to work on the WRT at but the wireless access did not function. Turning the DHCP service OFF did allow my wireless clients to get a valid IP on the network but they could still not connect thru the WRT to get to the internet...I wonder if it is because I could not set the correct gateway ( in the LAN portion of the static LAN IP assignment.

    I also recall that I could not get the correct time into the WRT.

    Thanks for taking the time to post your suggestions...I will retry from scratch again on Monday. But I am doubtfull since I believe I have tried this all before.

    If you (or anyone esle) has a brilliant insight, please post.

  10. frankieg

    frankieg Network Guru Member

    In fact you can't do it on the WRT (at least to my knowledge)

    So you have 2 ways:
    1- Define your gateway ( manually at every PC
    2- Find some other device that can perform properly as a DHCP server, not as WRT does. Probably you Internet router can do DHCP.

    In this case the WRT, I am repeating myself, will simply pass packets wired <--> WLAN, doing no routing.

    BE sure NOT to fiddle with the routing table. It should contain just 1 route, the one that is created by default.

    Good luck!

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