Network assigning same IP address to two computers

By virexmachina ยท 4 replies
Jan 18, 2005
  1. I have two computers connected to a Linksys Etherfast Hub and my DSL modem attatched to that and both computers keep assigning themselves the same IP address from DHCP. Then they both display the "There is an IP address conflict with another computer on the network." This is a problem, obivously, because neither can then connect to the internet or each other like that. Sometimes though, one will connect and the other wont get an IP address. I've done the whole release/renew and they either both get the same IP or one fails and the other is successful.

    When I connect just one computer to the hub or straight to the modem, it correctly gets IP/DNS and such and connects to the internet just fine. I bought a new Switch to replace the hub but it has the same problem. Which leads me to believe it is one or both computers that are the culprits. One is a computer I built a few years ago and the other is a week old Compaq. Both are running Windows XP Pro SP2. I have not manually assigned an IP address.

    Any ideas?
  2. Samstoned

    Samstoned TechSpot Paladin Posts: 1,018

    right click on network icon
    left click on properties
    right click on connection
    left click properties
    scroll dwn to tcp/ip highligt
    click properties add the ip settings
    from your router status window you will get info of your wan
    and dsn settings
    your default router address
    my setup default nic card
    dns is what you ip gives you
    do the same for other nic change 192.168.1. 101 to 225 not the same # as other nic hit OK
  3. Didou

    Didou Bowtie extraordinair! Posts: 4,274

    Or you could simply look up your modem's settings & see if it's DHCP "server" is configured to assign more then one IP. Maybe you just need to raise the available IPs.
  4. Nodsu

    Nodsu TS Rookie Posts: 5,837   +6

    Does that modem work as a router at all? You need a router to share your internet connection.
  5. Samstoned

    Samstoned TechSpot Paladin Posts: 1,018

    My Bad should have read that slower
    hub's and switchs cannot be used for networking..
    you can however make 1 pc a router you will need another nic card.
    I am in the process of tweaking dual nics and there is info out there that uses 2 pc's with 1 IP address for both machines however the switch has to be able to do 803.3ad link aggregation and or 803.1Q . also handle ALB.
    I am finding out fast only high end switchs do this.
    it still may be possable to have connection ,but it will be a little slower
    microsoft has link to IT section that discuss's all solutions.
    your fix get a cheap 4 port router put the hub aside
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