Doesn't obtain IP address automaticlly

Discussion in 'Wireless Networking' started by Guest, Oct 19, 2004.

  1. Guest

    Guest Guest

    We're having trouble getting a laptop connected to the internet using a
    wireless card. This is the 4th wireless device connecting to the wireless
    router modem and there were no problems with the previous ones.

    By looking at the IP details displayed with the wireless utility software
    it's obvious that it is not getting the correct address from the router. At
    the moment it is but was something else earlier. Every thing is
    definately setup to optain IP address automatically we even managed to the
    internet to work when we connected the laptop to the router with an ethernet
    cable. This also had the effect of forcing the ip address for the wireless
    network to the correct address and therefore worked without the cable but
    after a while it changed back.

    By going into the router using another computer we can see this laptop
    listed in the DHCP client list with an IP address asigned to it.

    The laptop is a dell and is running XP home (SP1a)

    Any ideas?
    Guest, Oct 19, 2004
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  2. Richard,

    There are several potential items here that could be going wrong. You did
    not mention the type of security you are using. I imagine that
    you have a Open AP using WEP encryption. Now, I wonder if at one point this
    node was able to get access, and for that reason did get
    a DHCP lease, but later was subsequently unable to do the same.

    Please check your WEP Key to make sure it is correct betweent the AP and
    this node. This is the first thing that I would check. The second thing
    be to work around the DHCP client/server: give the node a static IP address
    that is the same as what the AP supposedly handed out to this machine. The
    default gateway, DNS server, information you should already know, having
    configured the AP with this information previously.

    If you can get connected to the WLAN and "see" the other nodes using this
    static configuration, we can later try to debug the DHCP client/server
    problem, if there is one.

    To test connectivity, use ping from the problematic node:
    From the command window, type:
    where this address corresponds to one of the three nodes (or the access
    point itself) which works.

    Please let me know what the results of this are.
    Brian Wehrle [MSFT], Oct 20, 2004
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  3. Guest

    Guest Guest

    For the encryption all I know is that we have a 128bit WEP key. We've tryed
    manualy entering IP addresses plenty of times but it doesn't seem to change
    anything. Also the attempts to ping any other clients or the router failed.

    We can still get the wireless capability working by first using the cable
    but it will not connect of its own accord.

    Also not mentioned in my first post is that the card is a wireless b
    standard, this should not be a problem since the router is set up to be back

    A recent twist to this tale is the appearance of another wireless network
    that can be connected to and the internet used sucesfully although the signal
    does come and go. We're not sure if this is another wireless network on the
    street or some ad-hoc thing created by our own network (I say this because
    the name of the network is identical to the name a housemate used when her
    zone alarm asked her to give a network a name)

    Guest, Oct 31, 2004
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