networking problem .. very weird ..

Discussion in 'General Mac Discussion' started by piatek, Nov 3, 2004.

  1. piatek macrumors newbie

    Oct 29, 2004
    So this is what happened. i got my mac like a week ago and i had it on a network through a hub with win XP. All of the sudden, might have been right after i did automatic updates, my connection is messing up. Whenever someone starts using internet on XP, mac internet will be down untill u renew your Ips and then when you start using the internet on a mac, win connection will go down
    . When you are on mac, XP internet will be down, untill you renew your ip, and when you start using net on XP, mac connection will go down.

    very wieird.
    i have tried everything .. completely eerything .. and so did other people
    do you guys think it might be some security update i installed ?
    is it possible to uninstall updates ?

  2. varmit macrumors 68000


    Aug 5, 2003
    Ok, need some more details. Who and what is the connection? Cable from Comcast, or Verizon DSL, what is the connection? Are you useing a wired router made by who? Are you using DHCP from the router to the PC and Mac? Did you setup Mac Address cloning on the router? You need to tell us what you have for us to help you out.

    Have you tried to reset the router, turning it off for a minute, then turning it back on?
  3. piatek thread starter macrumors newbie

    Oct 29, 2004

    This is the entire setup.

    Mac and XP are connected to a hub, which is connected to a modem ( uplink ). Service provider is Rogers. When i am on any machine, it shows the ip configuration, but when i start using the machine, the ohter one will simply not be able to connect to the internet untill i renew the DHCP lease.

    I did restart everything, otherwise i wouldn't ask. I fix computers, but this problem beats me. Never seen it before.
  4. emw macrumors G4


    Aug 2, 2004
    Connected to a hub or a router? A hub will simply split the connection between the two devices. They both can't have an IP address at the same time because you only get one.

    In order to truly share your internet connection, you need a router (you can get cheap wired ones for $30 or $40) to connect to the modem then use the router to distribute internal IP addresses.

    Cable Modem - Router - Mac
  5. keybrdplaya macrumors newbie

    Nov 6, 2004
    This is correct, you MUST have a router (not a hub) installed. from 1 of the router's outputs, you may use the uplink on your hub to as many computers as you wish. Just get a 4or 5 port router, and the prob is solved
  6. Westside guy macrumors 601

    Westside guy

    Oct 15, 2003
    The soggy side of the Pacific NW
    Well, perhaps his provider offers more than one IP address - some do. Or perhaps he's using the terms hub/router interchangeably, like some people do.

    But if it's truly a hub, isn't all your "internal" traffic getting sent upstream as well? Hubs aren't intelligent. Seems like it'd be a poor practice security-wise, not to mention that it'd impact the speed of your connection.

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