Problem with configuring wireless router

June 9, 2012 at 14:03:20
Specs: Windows 7
I'm trying to set up a router so I can have wireless Internet in my house but I'm not good with networking stuff and I can't seem to set it up right.

The router is connected via Ethernet to the modem and I have 3 computers connected via LAN to the router.

The the networks start running fine,both WAN and LAN, but suddenly the WAN stops working, all 4 smartphones remain connected but with no access to the Internet, If I disconnect the devices I cannot reconnect them, they detect the router but they just don't connect to it.

To solve this problem I have to go to the web browser and access the settings page of the router and Reboot it. When I do this the WAN network starts working again but the LAN network dies. I have to "Release" the Dynamic IP and then Renew it. When I do this both LAN and WAN networks work fine but eventually the WAN dies again and I have to repeat the process all over again to get it to work. I do this around 10-15 times a day.

Any solution? Any diagnostics? Like I said, I'm not very good with networking so any help you can provide would be appreciated


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#1
June 9, 2012 at 14:58:11
What make and model is the router you have?
Is the latest firmware installed onto the router?
What loses the WAN (internet) connection, all connected devices or the router itself? Check the status page of the router for that.

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#2
June 9, 2012 at 15:11:25
TP-LINK WR740N

I'm gonna update the firmware right now.

The connection is lost by the devices. I think the router stays connected because it shows the IP and subnet, etc.


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#3
June 9, 2012 at 15:17:29
Do you mean the public ip and subnet mask?
Internal (private ip) is normally always available.

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#4
June 9, 2012 at 15:24:57
Yes, all the data provided automatically by the ISP by dynamic IP. As far as I know, the WAN is not connected if there it shows 0.0.0.0 but, like I said, I assume the router is still connected because there it shows other numbers.

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#5
June 9, 2012 at 15:46:12
You're right, 0.0.0.0 means that the router is waiting for an ip address from the ISP.

So best is, to first install the latest firmware onto the router.

1. Write down the current router settings.
2. install the latest firmware onto the router.
3. reset the router to it's factory default settings
4. reconfigure your router from scratch.

This is necessary to avoid incompatibility with old functions and settings, that may no longer exist or may have been renamed or something like that.


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#6
June 9, 2012 at 16:52:55
Updated the router's firmware, restored factory defaults and reconfigured. Problem remains.

At first both WAN and LAN work fine, suddenly the WAN stops working. It says it's still enabled, in fact on my Android device it stays connected but doesn't not access Internet, my sisters' blackberries get disconnected and that's how I find out it died, because on the router status page says the WAN is working fine showing IP, subnet, Default Gateway, etc.

I've been reading alot, I don't know if it's something called IP collision between the Router's IP and the modems IP, I tried changing the router's IP a few times, It didn't work either.

I also read that the Dynamic IP sometimes changes too often and I don't know if that makes the devices lose the wireless connection or something like that.

Thanks for the help by the way!


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#7
June 9, 2012 at 17:17:24
First of all, did this happen, if only one mobile device is connected to the router?

I got this issue with another router, where I had to configure a fixed ip address, with the appropriate subnet mask, DNS server and default gateway address.
After that, there were no disconnections at all.


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#8
June 9, 2012 at 17:22:54
Currently, 3 mobile devices are connected and get disconnected when the problem starts. It happens even with only one connected. I dont know if this happens with no devices connected since the WAN section of the status page shows no problems.

How would I be able to establish and Fixed or Static IP when my ISP provides my IP Dynamically? I guess I could set the DNS servers and the subnet mask, but the IP changes every once in a while...


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#9
June 9, 2012 at 17:35:40
I don't meant the ip of the router.
I meant the ip of the mobile devices.
My Android device got the same problem.
It disconnected from WLAN every 15 seconds or so.
The I configured the IP address of my Android device with a fixed ip address and all the other ip settings, as described in #7 and got no problems anymore.

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#10
June 9, 2012 at 17:49:19
Would I have to do this with EVERY mobile device I try to connect to my network? Another question. Is it normal that the router DHCP server is enabled and set to assign IPs from 192.168.2.100 to 192.168.2.199 but the IP address set Dynamically by my ISP is in the range of 190.38.32.1. Aren't they supposed to be in the same range or something? Is there a formula or a way I could detect something wrong on my configuration that could be causing this problems? (Like I said at first, I'm kinda new at Networking and there's lots of things I still don't know)

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#11
June 9, 2012 at 18:01:08
First, try to configure only one mobile device with a fixed ip address of the range 192.168.2.2 to 192.168.2.99. I suggest to use this range, cause the router uses 192.168.2.100 to 192.168.2.199 for dynamic ip address assignment.

If this works for the one device, try the next device.
Note: You must not use the same private ip address on multiple devices.
Use 192.168.2.2 for the first device, 192.168.2.3 for the second one, aso.

Don't forget to also configure default gateway and DNS server on that mobile device.
Otherwise, you will not be able to access the internet.
I guess the ip address for default gateway and DNS server is in your case 192.168.2.1.

The ip address range you posted (192.168.2.100 to 192.168.2.199) are private ip addresses, that are not accessable from the internet. This addresses are for your private network only.

So to be able to communicate with the internet, you need a public ip address.
While the ISP mostly only provides one public ip address, you need a device, that manages, that you can access the internet from private ip addresses with multiple computers or mobile devices over only one public ip address.
That's what a router does.


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#12
June 9, 2012 at 18:34:16
Configured my Android with a fixed IP. Did not work either, it connected at first but eventually the connection died. Had to reboot to make the WAN work again as usual. Any other Ideas? Again, thank you very much for the help!

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#13
June 9, 2012 at 19:35:41
Did this also happen, when connecting e.g. a laptop via WLAN to the router, with no other devices like mobile devices connected?

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#14
June 9, 2012 at 19:39:20
I don't have a laptop to try that. Sorry. Do you think It could be a hardware issue? It has a 5 year warranty so maybe I should use it.

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#15
June 9, 2012 at 19:44:58
You are talking about the router or the mobile device, that has 5 years warranty?

First I suggest to go to the manufacturers homepage of the router and search the FAQ for such problems.

Secondly I suggest to go to the manufacturers homepage of the mobile device and search the FAQ for such problems.


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#16
June 9, 2012 at 19:54:59
I meant the router. All devices are fine, since they can connect to other routers with no connection related problems.

I searched the FAQ and found nothing similar. I also tried contact support and I'm waiting for a response.


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#17
June 9, 2012 at 20:05:29
Have you bought the router in a shop in your environment?
If so, take it back, chose another router and check, whether you can connect to the router with your mobile device right in the shop, if possible.

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#18
June 9, 2012 at 20:12:51
Yes, I plan on going to the shop where I bough it on Monday and discuss the situation with the owner, maybe he can give me some support too, or maybe he identifies the problem better or something.

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#19
June 9, 2012 at 20:24:54
Would be great, if you keep us posted on that.
Good luck.

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