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Windows 7: DHCP/PPPoE server cannot detect internet connection.

20 Oct 2015   #1
BorisTheAnimal

Windows 7 Home Premium
 
 
DHCP/PPPoE server cannot detect internet connection.

Hiya.

Been having this issue with my Buffalo AirStation WHR-G300N Wireless router, and I'm starting to go nuts with it. I tried restoring it to factory settings but that didn't do anything, now I'd like to get this working pretty quickly because my mom likes to use the internet and this is the only wireless router I have.

Additional info: In my room there is a Cisco EPC3825 modem which gives me internet through cable and then I have another cable going to another room where the wireless router is at.

I'm a bit unsure as to what kind of information I'm supposed to give, at least I hope this is a good start.

Boris over and out!


My System SpecsSystem Spec
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20 Oct 2015   #2
foxyrick

Windows 7 Ultimate x64
 
 

So, you have a network cable connecting the Cisco to the Buffalo, and want to use the Buffalo just as a wireless AP?

It sounds like your Buffalo is trying to be the 'internet' router, whilst your Cisco is actually doing that job and the Buffalo should only be used as a simple wireless access point.

Try moving the switch at the back of the Buffalo to 'Off' - that stops all its router functions and makes it behave as a simple LAN switch and Wireless AP. I think that is what you are trying to achieve.

The Buffalo has a default IP address of 192.168.11.100 (when in the 'Off' mode). If this is different to your Cisco's network subnet (the default is 192.168.0.1 for the Cisco, so it is different unless you've changed things) then you will not be able to use a web browser to connect to the Buffalo at first, and you might need to in order to configure the wireless settings.

There are specific instructions in the Buffalo's downloadable manual on page 24, titled 'connecting to a preexisting network' for changing the Buffalo's IP address to match the existing (Cisco) network.

The only difference is that instead of changing to IP address 192.168.11.137 (which is assuming you are using another Buffalo for the Internet connection), change it to be in the Cisco's range (for instance, 192.168.0.137). Then you can use that IP address to access the Buffalo.

Hope that helps.
My System SpecsSystem Spec
21 Oct 2015   #3
BorisTheAnimal

Windows 7 Home Premium
 
 

Quote   Quote: Originally Posted by foxyrick View Post
So, you have a network cable connecting the Cisco to the Buffalo, and want to use the Buffalo just as a wireless AP?

It sounds like your Buffalo is trying to be the 'internet' router, whilst your Cisco is actually doing that job and the Buffalo should only be used as a simple wireless access point.

Try moving the switch at the back of the Buffalo to 'Off' - that stops all its router functions and makes it behave as a simple LAN switch and Wireless AP. I think that is what you are trying to achieve.

The Buffalo has a default IP address of 192.168.11.100 (when in the 'Off' mode). If this is different to your Cisco's network subnet (the default is 192.168.0.1 for the Cisco, so it is different unless you've changed things) then you will not be able to use a web browser to connect to the Buffalo at first, and you might need to in order to configure the wireless settings.

There are specific instructions in the Buffalo's downloadable manual on page 24, titled 'connecting to a preexisting network' for changing the Buffalo's IP address to match the existing (Cisco) network.

The only difference is that instead of changing to IP address 192.168.11.137 (which is assuming you are using another Buffalo for the Internet connection), change it to be in the Cisco's range (for instance, 192.168.0.137). Then you can use that IP address to access the Buffalo.

Hope that helps.
But the odd thing is that this started happening last weekend, before this I and my mom have both been able to succesfully connect to the wireless network without issues. And I'm pretty sure I haven't done any changes to the Cisco box.

Yeah I must have switched the switch by accident when scrambling with cables and stuff.
Oh these simple things that you don't think about.
My System SpecsSystem Spec
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21 Oct 2015   #4
BorisTheAnimal

Windows 7 Home Premium
 
 

I god damned knew that it couldn't be that easy to set up a wireless internet.

After I had done step 6 on page 24 like foxyrick mentioned in his post, my computer tells me that "Ethernet" doesn't have a valid IP configuration.

And then I get a random IP address: 169.254.86.174 in my case with a subnet as 255.255.0.0 plus a default gateway as an IPv6 thingy.

And changing the IP address to eg 192.168.0.137 only produced the same as stated above.
My System SpecsSystem Spec
21 Oct 2015   #5
foxyrick

Windows 7 Ultimate x64
 
 

Did you manage to connect to the Buffalo and change its IP address as in step 5?

Is the Cisco still connected into the network with your PC as well? It should be giving you an IP address (192.168.0.something) by DHCP unless you've specifically done something to disable that on the Cisco.

Are you sure that you reset the IP settings on the PC to Obtain an IP address automatically?
My System SpecsSystem Spec
21 Oct 2015   #6
BorisTheAnimal

Windows 7 Home Premium
 
 

Yeah I did connect to it and from my Cisco it says that one device is assigned an ip address 192.168.11.something, yet all devices that get connected to the Buffalo get an ip of 169.254.something.something and the ipad gets a dns in form of a ipv6 and the subnet 255.255.0.0, and I get to the internet with the ipad but only certain sites opens up, eg I can access Wikipedia but I can't access the App Store...
My System SpecsSystem Spec
21 Oct 2015   #7
BorisTheAnimal

Windows 7 Home Premium
 
 

Oh and the computer which is connected with a cable to the Buffalo has an ipv6 connection but no ipv4..
My System SpecsSystem Spec
21 Oct 2015   #8
BorisTheAnimal

Windows 7 Home Premium
 
 

Argh, I cannot believe that the only thing that I forgot to do was to reset my modem, no wonder nothing worked.
The Buffalo was correctly configured, it just seems that my modem was feeding it old information.
I feel ludicrous.

Now I'm not marking this solved even if you who are reading this might question why, oh I will tell you why!

Now I would like to set up a WiFi on my modem that my devices would connect to if they were to be out of range from my Buffalo, is there any way of doing this?
My System SpecsSystem Spec
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 DHCP/PPPoE server cannot detect internet connection.




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