Duplicate IP address  May affect connectivity

Posted on 2007-10-08
Last Modified: 2013-12-24
I have a new laptop and when I went online, I got this msg. My husband then got same msg on his computer.  I don't know how to get a new IP address assigned to my new laptop?
Question by:Amacadar
    LVL 4

    Accepted Solution

    what operating system? i'm assuming XP..

    go to Start > Control Panel
    double click "network connections"

    Connecting using Wireless network Connection?  if so, right click the  Wireless Network Connection, and press "properties", in General Tab, inside "this connetion uses the following items" look for  Internet Protocal (TCP/IP) and select that and press "Properties" again.    make sure that both machine selected  "Obtain an IP address Automatically"  and also  "Obtain DNS server address automatically"

    press OK, OK again,  X out of control panel and go to   Start > Run   and type in  CMD and press OK, in the command prompt,  you will see   c:\>  or something similar,      just type in    "ipconfig /all"   that should show the new ip ..  if not showing and still giving you the same problem.. do this

    c:\> ipconfig /release  (press OK)
    c:\> ipconfig /renew (press OK)
    c:\> ipconfig /flashdns

    then try  

    c:\> ipconfig /all   (again)

    Hope this help you guys fix your problem.. if not.. just post a not and maybe we can find another option
    LVL 2

    Assisted Solution

    IP addresses come from 2 places DCHP....meaning they are assigned from another device (a dhcp server/wireless router)....or they are static...meaning they have been manually entered

    are your addresses static or DHCP?

    to find this out click start
    click run
    type cmd and press enter
    type ipconfig /all and press enter
    You will see a line that says DHCP this yes or no?
    if no then your address is static.....

    do the same thing on your husbands laptop.....
    is his static? yes/no?

    if both are static and these are the only 2 computers then just change yours to a different address
    i.e. if his is make your

    to change the address on XP do the following:
    click start
    click control panel
    click network and internet connections
    click network connections
    right click the connection you are using and click properties
    on the general tab scroll down to Internet Protocol (TCP/IP) and dbl click it
    here is where you will change the address
    be sure to keep the subnet mask and def gateway the same as your husbands

    if dhcp is enabled then your dhcp server (probably your wireless router) has not been set up with a wide enough range of can probably refer to the manual for the wireless router for instructions on doing this....

    let me know if this helps!
    LVL 10

    Expert Comment

    Above experts are correct... I would venture you are set as a static IP.

    Prior to making setting changes:

    1) Do you have a router between the broadband device & computers?
    2) If not... you would likely use DHCP with the ISP (allows them to assign IP addresses)

    -> If you have a router, you could use either DHCP or static.

    ==> also, typo in first response: "c:\> ipconfig /flashdns"  ... /FLUSHdns

    LVL 4

    Expert Comment

    sorry man.. typed to fast , i didn't see that mistake. thanks for the correction :)
    LVL 4

    Expert Comment


    Author Comment

    Thank you.  I am using Vista on my new laptop but your solutions worked perfectly.   Thanks again!

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