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Trouble getting WET (Wireless Ethernet Bridge) Mode Working

Discussion in 'HyperWRT Firmware' started by greynolds, Jan 17, 2007.

  1. greynolds

    greynolds LI Guru Member

    I apologize for cross posting this here and at the HyperWRT forums, but I haven't gotten any responses over there that have lead me in the right direction and there seems to be more activity here, so...

    I've got a pair of WRT54GS routers, one of which is brand new running the stock Linksys 1.50.6 firmware. The other is older and running 4.71.1, Hyperwrt 2.1b1 + Thinor15c firmware. My goal is to use the new WRT54GS as the wireless access point (my wireless print server and my laptop both connect to it just fine) and the older WRT54GS as a Wireless Ethernet Bridge. I think I have things configured properly, but it isn't working, so I either have something set wrong OR have wireless range issues.

    Here's my configuration:

    Linksys Cable Modem is connected to a Linksys BEFSR81 V3 wired gateway / router, so this is my connection to the internet and my DHCP server.
    The new WRT54GS router is wired to a port on the BEFSR81 gateway / router and is setup as the wireless access point - as mentioned above, a Linksys wireless printer server and my laptop both connect to it just fine.
    The old WRT54GS router is configured for WET wireless mode.

    My settings:

    BEFSR81:
    Internet Setup
    Internet Connection Type: Optain an IP automatically
    Network Setup
    Local IP Address: 192.168.1.1
    Subnet Mask: 255.255.255.0
    DHCP Server: Enable
    Start IP Address 192.168.1.200
    Number of addresses: 50
    Client Lease Time: 0
    Everything else is at default settings - no port forwarding or filtered IP addresses, etc.

    NEW WRT54GS
    Internet Setup
    Internet Connection Type: Automatic Configuration - DHCP (there isn't a Disabled option)
    Network Setup
    Local IP Address: 192.168.1.2
    Subnet Mask: 255.255.255.0
    DHCP Server: Disable
    Advanced Routing
    Operating Mode: Gateway
    Wireless Network
    Wireless Network Mode: G-Only
    Wireless Network Name (SSID): reynolds_wireless
    Wireless Channel: 6 - 2.437GHz
    Wireless SSID Broadcast: Enable
    Wireless Security
    Security Mode: Disabled (I intend to enable this after I get things working)
    Everthing else is at factory defaults

    OLD WRT54GS
    Internet Setup
    Internet Connection Type: Disabled
    Network Setup
    Local IP Address: 192.168.1.3
    LAN Gateway: 0.0.0.0 (I've also tried 192.168.1.1)
    LAN DNS: 0.0.0.0 (I've also tried 192.168.1.1)
    Subnet Mask: 255.255.255.0
    DHCP Server: Disable
    Advanced Routing
    Operating Mode: Gateway (I've also tried Router)
    Wireless Network
    Wireless Mode: Wireless Ethernet Bridge
    Wireless Network Mode: G-Only
    Wireless Network Name (SSID): reynolds_wireless
    Wireless Channel: 6 - 2.437 GHz
    Wireless SSID Broadcast: Enable
    Wireless Security
    Security Mode: Disabled (I intend to enable this after I get things working)
    Everthing else is at factory defaults

    Everything except the Wireless Ethernet Bridge is working fine. With the old router out of the picture, my wireless printer server and laptop connect to the access point with no problems and all my wired equipment works fine. My PC's are all wired either directly to the BEFSR81, the new WRT54GS, or to a Linksys switch and are set up for DHCP and get the appropriate info - they have full access to the internet and to each other.

    If I replace the wired connection to one of my PC's and plug it into one of the 4 LAN ports on the old WRT54GS, reboot the WRT54GS, then do an IPCONFIG /RELEASE and IPCONFIG / RENEW on the PC, the PC doesn't get an IP address, nor can I ping anything (obviously). If I connect one of the other LAN ports on the old WRT54GS to the rest of my wired network and then IPCONFIG /RENEW on the PC that's connected to it, everything works fine except that I'm obviously not getting the wireless ethernet bridge piece of the puzzle.

    All this is happening so I can temporarily relocate a couple of PC's to an area of the house with no wired network ports while we install new floors upstairs. I figure I must be doing something wrong, but have no idea what, so any pointers would really be appreciated.

    One thing that's difficult about this is that there doesn't seem to be much in the way of diagnostics - I can't figure out if my configuration is wrong OR if the old router doesn't have enough range to reach the new router in the current location. If I do a Site Survey on the old router, I do see reynolds_wireless in the list, but it isn't clear to me if the old router is seeing itself OR the new router.

    Any assistance would be appreciated. If you need more info on my configuration, let me know and I'll do my best to provide it.
     
  2. Thibor

    Thibor Super Moderator Staff Member Member

    first reset the gs to defaults to clear out any crap it may have accumulated whilst you've been dicking with it. then set this:
    internet connection: Disabled
    lan ip 192.168.1.3
    lan gateway 192.168.1.1
    lan dns 192.168.1.1
    dhcp server: off
    wireless : MIXED(on both routers)
    channel 6, 1, or 11 (on both)
    ssid: don't care but they have to be the same
    preamble:long or short but they both have to be the same
    encryption: off
    Firewall: off, all boxes unchecked.

    this is all i ever have to do to get a wet bridge established, although i have stated on many, many occasions and also written on my website, in the instructions of how to configure a WET bridge, which you haven't read, you should put your wet router's ip address on a seperate subnet to eliminate any conflicts. this doesn't have to be the case but i found that reliability was better when this was done.
    also, make sure you don't have any mac filtering enabled on the AP, this will really bugger things up. and try using static ip's behind the wet router, it will eliminate any possibility of the AP being screwy and not handing out addresses.
     
  3. greynolds

    greynolds LI Guru Member

    This appears to be the key item that I had missed. I made sure that everything else (with one exception - see below) was as you said and this was the only difference I had control over, so I made the change on both routers and WET mode is now happy.

    This option isn't available in the stock firmware on the newer Linksys router, but the long option appears to be compatible as it is now working.

    I apologize, but in all my googling and searching in the forums, I don't think I've found your website, at least not your instructions on how to configure a WET bridge.

    I had come across this, but was more concerned with getting it to work at all first.

    I don't think I can get away with static ip's, but will give that a shot if I start to have problems.

    Thanks so much for your reply - I've been really stumped as I thought I had followed the instructions I HAD found and hadn't seen anything about using the mixed wireless mode. And thanks so much for the work you've put into the firmware - I've been working on a volunteer software project (accessDTV HD tuner card) for a number of years now and certainly appreciate the number of hours that go into these projects and the lack of appreciation that one often gets.
     

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