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IP Address Conflict--how to resolve?

Discussion in 'Networking Issues' started by gaudiora, Dec 14, 2005.

  1. gaudiora

    gaudiora Network Guru Member

    Hello everyone,
    Here's my setup:
    PowerMac G5 w/ latest version of OSX
    Connected to WRT45G
    WRT45G is for a network in my apartment, which is used almost exclusively by my roomates' two Windows computers.

    Lately, I've been having IP address conflict that has caused a lot of connectivity problems. The error message basically says
    "IP adress 192.1.68.1.101 [or a derivative of it] in use by [my mac address].

    So, I've tried a few things, like manually assigning a IP address (system preferences->network->configure->configure ipv4 using manual dhcp), dhcp release & renew, turning off my router and cable modem, etc with no luck.

    I'm really at a loss--I'm a basic user, and I feel like I've exhausted my options and my ISP isn't of much help either. If you could give me some advice, that would be great!
     
  2. sufrano63

    sufrano63 Network Guru Member

    R others two PCs using DHCP? If you only have 3 workstations on your network, why not assign a static IP to each one and turn off DHCP in the WRT54G. I think that would solve the IP conflict issue. For Example:

    - 192.168.1.10 (your MAC)
    - 192.168.1.11 (Windows PC# 1)
    - 192.168.1.12 (Windows PC# 2)
     
  3. gaudiora

    gaudiora Network Guru Member

    Thanks for your reply, surf. I might try this and see how it goes; however, do you know any other way to solve this issue? Ideally, I wouldn't like to assign each of them a static IP & turn off DHCP because occasionally, we bring one other comp into the network, and then we'd have to remember to make a static IP for that, right?
     
  4. howardp6

    howardp6 Network Guru Member

    If you can set a static IP Address for your MAC set it outside the range of the DHCP server on the WRT54G, but on the same subnet. For example if the WRT54G is issuing addresses in the 192.168.1.X range, where X is fifty or another number and it can have Y number of clients, give the MAC as IP Address of 192.168.1.Z, Where Z is less than X, but not equal the local assres of the router, or Z is greater that X + Y. This way you can still have the DHCP server giving out IP Addresses.
     
  5. sufrano63

    sufrano63 Network Guru Member

    I would still assign a static if your network has 5 or less devices. Reason being security for one. If you're insist on using dhcp, then head over to the dd-wrt forum and d/l their fw from www.dd-wrt.com. It has a feature called static dhcp, where you input the mac address, pc name and assign an IP. Your your MAC and 2 Windows workstations would get a reserved static IP address and still configure as dhcp. Any new client would be getting an IP from the dhcp.
     

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