Another computer with the same IP address?

Rodeomoth · Sep 24, 2015

Desktop specs:
Motherboard- GA-78LMT-USB3
OS- Windows 7
Adapter-802.11bgn 1T1R

ISP-Charter WiFi
Modem- CiscoDPC3216
Router-Netgear R6300

Okay so I have a problem connecting my Desktop to my Network. I admit I would be far less confused if it just didn't connect at all except there is a strange "ritual" I can do to make it connect.

It will not automatically connect to it when I log on (as it should according to how I set it up) and still wont connect if I manually hit "connect" in the wifi tab. However if I let the manual connect run its course and tell me "sorry cant connect" then if I click the sad little empty wifi tab it will then connect to "a" network named "MJL 2". This is odd because my network name is just "MJL" so im not sure why it has added the "2" at the end.

My router broadcasts two different networks I can connect my devices to (a 5G and a 2G).
Desktop- 2G (my adapter will not pick up the 5G network)
PS3- 2G
Iphone 6- 5G
Samsung Galaxy 2- 5G
Acer Chromebook- 5G
Lenovo Laptop- 5G

One time when I tried to connect it gave me an error message that "another computer with the same IP address is already connected to this network". However this is the only variant to the usual routine I explained above. Im not sure why this is happening so I hope you all have some ideas. Thanks for your help and consideration!

Ralston18 · Sep 25, 2015

Rodeo,

Try to gather some information with regards to where the wireless connection attempts are going or being made (i.e., connecting).

Do you know how to run ipconfig /all from the command prompt?

If so run ipconfig /all three times:

1) after boot up

2) after doing the manual connect (that fails)

3) after connection is made via MJL 2.

Also: are you in an apartment or dorm or other location where there are multiple wireless networks?

Do you share your wireless network with other family members or friends?

Are you knowingly using or aware of any static IP's within your network?

And here is a link to your router's User Manual:

http://www.downloads.netgear.com/files/GDC/R6300V2/R6300v2_UM_20May2015.pdf

If you have admin access to the router take a look/confirm that your settings are as you expect them to be.

Please post accordingly and we will go from there.

Rodeomoth · Sep 25, 2015

I am in an apartment building where there are many wireless networks

I do not think there are any static IP's present, certainly none that I configured

I really wish I could use the command prompt but sadly no I cannot do that

I just checked my router settings as the admin and all is as it should be...

DeadlyDays · Sep 25, 2015

It says 2 after the network because there are 2 "profiles" for the wireless network. The first profile is connecting with the same IP address as another system on the network, the second profile is using dhcp. This seems most likely. It is somewhat possible the DHCP server on the router is assigning you the same address the first attempt to a device with a static IP on the network, and on the second attempt assigning you X.X.X.X+1 because the first attempt made a lease on that address, and the second attempt assigns you one that isn't taken. In that case you can change the range of the DHCP server for addresses to assign and make it smaller.

Ensure you have WPA2 security on, in an apartment building anything less and you can assume your network has been broken into and someone is using a static IP to use your network. WEP takes a few minutes to break, WPA hours.

EDIT
I also wanted to add, are you sure the desktop cannot connect see the 5Ghz band, because it may also be trying the other network as a backup when the first fails. One of the machine may also be stupid and still be using an assigned IP address after the lease expired.

Ralston18 · Sep 25, 2015

Thanks.

The following information should help:

=========================
How to use ipconfig

On a Windows machine, you can use ipconfig to determine your network addresses with the following steps:
1.Open a command prompt window by pressing WinKey + R, then typing "cmd" without quotes.
2.Type "ipconfig" without quotes and press Enter.

This will display basic network information for each of your network adaptors. Try using "ipconfig /all" for more details.

Reference: technet.microsoft.com/.../bb490921.aspx

=============================

With many wireless networks around then some sort of conflict is suspect.

From my viewpoint "more details" are needed with regards to what your computer/network is seeing and doing as you go through the "ritual".

Try "ipconfig /all" per the above procedure to capture more information. If you are not comfortable running ipconfig on your own then try to find a friend or family member to help. Just use your admin rights if and as necessary.

Another option would be to just disable and remove your Desktop network adapter and reinstall as if new.

Note: Also agree with DeadlyDays' posting. ipconfig should provide some additional insight one way or another.

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Another computer with the same IP address?

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