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WRT54G Subnet Mask Conflict

Discussion in 'Cisco/Linksys Wireless Routers' started by yourmomentofzen, Aug 14, 2006.

  1. Just have an issue i'm trying to deal with. moved into a new house recently and got bright house which has its subnet mask at 255.255.224.0 and i'm running from the wall to an ethernet switch and from there to my wireless router. i did this because i had more than 4 ports to connect. anyways, the linksys router subnet mask is defaulted to 255.255.255.0 or a sub set thereafter. how do i go about changing and fixing this so i can actually get wireless in my house?
     
  2. Guyfromhe

    Guyfromhe Network Guru Member

    The subnet mask you can only select in the dropdown is the subnet of your LAN network not your WAN network. If each device on your lan gets a live IP just plug your switch into a LAN port and it will work like a wireless bridge. Just make sure to turn off the DHCP server on the router before you do that or your connection won't work and your ISP may get mad.
     
  3. adamchen

    adamchen LI Guru Member

    My LAN subnet is using 255.255.254.0 mask, but there is no option in the dropdown menu. If I set it to 255.255.255.0, I can not ping WRT54G when I connect it to my LAN switch with its LAN port. What can I do?
     
  4. Guyfromhe

    Guyfromhe Network Guru Member

    Try 255.255.0.0, that should allow them to communicate though it's still not right..What is bright house?
     
  5. adamchen

    adamchen LI Guru Member

    There is no 255.255.0.0 option, the best I can pick is 255.255.255.0
     
  6. Guyfromhe

    Guyfromhe Network Guru Member

    thats not going to help...
    whats this bright house?
    and why do you want that subnet mask?
     
  7. Mr Network

    Mr Network LI Guru Member

    Forget Bright House for the time being and just connect directly to the wireless router. Configure the wireless settings and security how you want, disable DHCP on it, and then connect one of it's LAN ports to your network. Sure you won't be able to access it anymore because of your subnet mask, but techncially you shouldn't need to. Once configured, the router should just act as a switch and AP.

    Not sure what IP address scheme Bright House uses, but if something other than 192.168.1.x, then what you can do is setup alternate configuration on your NIC so that you will always have acces to the wireless router. Go to the properties of TCP/IP for your Local Area Connection and click on the Alternate Configuration tab. Configure any IP address in the 192.168.1.x range, except that of the router, and set the netmask to 255.255.255.0. As long as you don't configure a gateway, you should be ok.

    If Bright House uses this IP address scheme, then change the LAN IP address of the router to something else on a diferent network and follow the same directions described above.
     
  8. Guyfromhe

    Guyfromhe Network Guru Member

    if he has to use DHCP he can't specify another ip on his NIC.
     
  9. atinexus

    atinexus Network Guru Member

    Help

    So you have Cable---Switch---Router setup in that order if im correct.
    Try this Cable---Router---Switch that way the router is plugged into the modem, set the subnet on the router to 255.255.255.0 and u should be all set.
     
  10. Guyfromhe

    Guyfromhe Network Guru Member

    he still hasn't explanied why he needs that subnet so that may not help
     
  11. atinexus

    atinexus Network Guru Member

    Subnet

    It really shouldnt matter what is external or internal subnets are set up as
    the external is aquired through dhcp from the cable or dsl modem and the
    internal subnet is only a setup matter for thousands of computers.
    255.255.255.0 is the default internal subnet of a linksys router because dhcp
    can only handle 254 clients if you change the subnet to 255.255.0.0
    you open a new range of ips and subnets on an internal network,
    however each seperate subnet would require a dhcp server of its own or static ips.

    --- I Aced Cisco Network Academy BTW :)
     
  12. Guyfromhe

    Guyfromhe Network Guru Member

    just under the assumption he had a block of live IPs from his isp he didn't want to abandon to a single NAT ip, but wanted to be able to get into the router to change config settings for the wireless. That would be a case where he could use a broader mask on the routers LAN address (if he was using it as a wireless bridge) but then the router would need an internet IP.... It probably would work best to just plug the internet into the WAN port and forget about it though...


    --- Good for you, now I know who to call when the 7400 'splodes :p
     
  13. Mr Network

    Mr Network LI Guru Member

    Sure he can. I currently have my NIC configured this way and it works just fine.
     
  14. Guyfromhe

    Guyfromhe Network Guru Member

    Maybe you can do that in XP (I don't use it), you can't do it in 2K...
     

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