Limited Connectivity/No IP address connecting to AP

Discussion in 'Networking Issues' started by MrKillBot, Nov 24, 2005.

  1. MrKillBot

    MrKillBot Network Guru Member

    Hi hope someone can maybe help with the following problem.

    I have a Dell Inspiron 8200 WinXP SP2 with, WPC54GS wireless card.

    I am able to connect to both my WRT54GS routers using all kinds of security(currently using WPA-PSK). I can connect to to friends non-linksys routers without a problem.

    When I try to connect to my university wireless network I have problems.
    I am able to see the wireless network I can connect, then insert the credentials, at this point it seems the DHCP server tries to get and IP address i only get a private address (

    The network requires the MAC address to be registered. I have done this, checking it by putting the wireless card into another laptop to test that the MAC for that card was registered. This connection was fine.

    I have tried the winsock fix and patches mentioned at

    These did not work. I have tried a complete clean install after this with a slipstreamed sp2 disc. I tried another install using sp1 but again no diff. (installed SP2 clean again)

    I have tried all of the above using the windows type configuration and the Linksys utility.
    I have setup another Laptop (Dell Lat)using the suggested settings in the attachment in this post, doing each step side by side, the Latitude connects and get an IP address no problem

    There are a number of APs in the University I have tried connecting to a few different ones.

    [ As an interesting sidenote someone else has the exact same problem with router at my friends, but can connect without problem at the university]

    Please see the attachement and any suggestions for this problem would be great. I have tried alot of suggestions found on google searching for Limited of No Connectivity (Seems to be a big prob)

    I am happy to try all suggestions whether I have tried them or not, as I reckon there are a number of people who have had similar problems and hope this will help a number of people.

    N.B I have tried both old and new drivers for wireless card

    OS Name Microsoft Windows XP Professional
    Version 5.1.2600 Service Pack 2 Build 2600
    OS Manufacturer Microsoft Corporation
    System Name INSPIRON
    System Manufacturer Dell Computer Corporation
    System Model Inspiron 8200
    System Type X86-based PC
    Processor x86 Family 15 Model 2 Stepping 7 GenuineIntel ~1794 Mhz
    BIOS Version/Date Dell Computer Corporation A11, 07/01/2004
  2. MrKillBot

    MrKillBot Network Guru Member

    This is the setup doc, could not get it to upload

    WLAN standard:
    802.11g (2.4GHz) with speeds up to 54Mbps (802.11b compatible but with slower
    speeds up to 11Mbps)
    Security standard
    Currently, the wireless service supports both WPA (Wi-Fi Protected Access) and 128
    bit dynamic WEP (Wired Equivalent Privacy). The instructions contained in this
    document are for WPA which is the preferred standard. WEP should only be used if
    there is non WPA compliance issue with your equipment.

    The following instructions are for configuring an XP SP2 laptop to connect to the
    wireless service using the built in XP wireless client. Some wireless adapter
    manufacturers provide their own wireless client e.g. Intel PROSet Wireless and Cisco
    ACU. The use of these clients is not supported by C&IT.
    For encryption, you should use WPA if your wireless device is compliant. If your
    device is WPA compliant but you have problems logging into the wireless network:-
    •Check with your wireless network card manufacturer for a driver update
    •If you are unsure/unable about updating drivers – use WEP
    The methods of configuring your wireless device for either WPA or WEP are identical
    except for the Association Setup section of this document.
    •Ensure you have Microsoft® Windows XP Professional or Home edition
    patched to Service Pack 2
    •Check with your wireless network adapter’s manufacturer that your adapter is
    WPA compliant (if the card is compliant, download/install the latest drivers)
    Produced By C&IT Services Page 4 10/10/2005
    The Wireless Laptop Service
    Please note: C & IT Services are unable to provide support for the installation
    of your wireless device
    As part of the registration process, you must register the MAC address of your
    wireless card adapter. To get your MAC address:
    •Click Start
    •Choose Run.
    •In the Open box, type cmd and click on OK (see Figure 1)
    Figure 1
    •When the command line box appears, type ipconfig /all and press Enter
    •The MAC (or physical) address you need to register is the one under the line
    Ethernet adapter Wireless Network Connection (not the Local Area
    Connection MAC address)
    Figure 2
    •Click Start
    •Choose My Computer
    •Click on My Network Places
    •Click on View Network Connections
    •Right click on the Wireless Network Connection icon
    •Select Enable if required
    •Select Properties
    Produced By C&IT Services Page 5 10/10/2005
    The Wireless Laptop Service
    Figure 3
    The Wireless Network Connection Properties window will appear:
    •Ensure both the Show icon in notification area when connected and Notify
    me when this connection has limited or no connectivity boxes are ticked
    •Select the Wireless Networks tab
    Figure 4
    •Ensure the Use Windows to configure my wireless network settings box is
    If you are within range of the Napier University Wireless network, NapAir will be
    displayed in the Preferred Networks list.
    You may need to click on the View Wireless Networks button to refresh this
    list; this will bring up a new window. Click connect and wait for 1 minute.
    •Select the NapAir network by clicking on it once
    •Click on the Properties button
    Produced By C&IT Services Page 6 10/10/2005
    The Wireless Laptop Service
    Figure 5
    On the Association tab:
    •For WPA - set Network Authentication to WPA and Data encryption to TKIP
    •For WEP - set Network Authentication to Open and Data encryption to WEP
    •Select the Authentication tab
    Figure 6
    Figure 7
    •Select Protected EAP (PEAP) as the EAP type
    •Ensure both the Authenticate as computer when computer information is
    available and Authenticate as guest when user or computer information
    is unavailable boxes are NOT ticked
    •Click on Properties
    Produced By C&IT Services Page 7 10/10/2005
    The Wireless Laptop Service
    Figure 8
    •Click on Properties
    •Ensure the Validate server certificate box is NOT ticked
    •For Select Authentication Method choose the Secured password (EAPMSCHAP
    v2) option
    Figure 9
    •Click the Configure button:
    •Ensure the Automatically use my Windows logon name and password
    box is NOT ticked
    •Click OK
    Produced By C&IT Services Page 8 10/10/2005
    The Wireless Laptop Service
    Figure 10
    •Click OK on the Protected EAP Properties window
    •Click OK on the NapAir properties window
    •Click OK on the Wireless Network Connection Properties window
    •Select the General tab of the Wireless Network Connection Properties
    •From the Wireless Network Connection Properties window highlight
    Internet Protocol (TCP/IP) by clicking once
    •Select Properties
    Figure 11
    The Internet Protocol (TCP/IP) Properties screen will be displayed.
    •From the General tab, click on Obtain an IP address automatically and
    Obtain DNS server address automatically
    •Click OK to get back to the Wireless Network Connection Properties
    •Click Close
    Produced By C&IT Services Page 9 10/10/2005
    The Wireless Laptop Service
    Figure 12
    Once your laptop has been correctly configured and you have registered your laptop
    and user details with C&IT Services you can now proceed to connect to the WiFi
    Service. By default, Windows XP automatically remembers your user login ID and
    password, so you should only have to perform the following steps when you connect
    for the first time.
    Please note: You will also need to repeat these steps each time you change
    your network password.
    •If you are within range of the WiFi service, click on the bubble which should
    appear above the Toolbar at the foot of the screen:
    Figure 13
    •Identify the NapAir network from the list of available wireless networks
    •Click on the Connect button
    Produced By C&IT Services Page 10 10/10/2005
    The Wireless Laptop Service
    Figure 14
    •Click on the following bubble which should appear above the toolbar at the
    foot of the screen:
    Figure 15
    •Enter your Napier University login ID and password (the same as you use to
    log in to the network and email systems)
    •Click OK
    Leave the Logon Domain box blank.
    Figure 16
    You can check if you have connected successfully in two ways:
    1. Hover your mouse pointer over the wireless network icon in the toolbar:
    Produced By C&IT Services Page 11 10/10/2005
    The Wireless Laptop Service
    Figure 17
    2. Check the status of the NapAir wireless network window:
    •Right click on the wireless network icon on the toolbar and select View
    Available Wireless Networks:
    Figure 18
    The following window will show that you are connected to NapAir:
    Figure 19
    When you have finished using the service:
    •Click on the Disconnect button.
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