Solved Weird Router Problem

August 7, 2011 at 09:24:13
Specs: Windows XP
I am having problems getting my network to work and am going crazy trying to fix it. Can someone maybe help me out?

My setup is as following:

I've got a Cisco 2425 Eurodocsis Cable Router [CABLE ROUTER], provided by my ISP (UPC in the Netherlands) and it's connected to the main cable splitter (provided by UPC) and serving 192.168.1.x addresses.

Downstream is a Cisco E4200 Wireless Router [PERSONAL ROUTER] (w. 4 port switch) serving 192.168.0.x adresses.

The problem is when I connect my client to the [PERSONAL ROUTER] it gets a 192.168.100.x adress (!!!!).

If I browse to the gateway 192.168.100.1 I get the following pages...


It obviously is some device belonging to my cable provider UPC since it has a lot of "analogue signal metrics" stuff on it. It definately is not someting in my house, as said the main TV cable "splitted" output goes into my CABLE ROUTER, no other devices in my house.

Needless to say the cable provider helpdesk guy (after waiting an hour to get through to the call centre) told me to disconnect my router for 1 minute (of course they won't wait for reboot) and then call back...when I did they allowed me to send them a mail, which hasn't been answered to date

So my question is: anybody got a clue as to what's going on? Why don't the CABLE and PERSONAL ROUTER not respond to the DHCP lease request and some upstream device does? Is it a timing thing? Could I block the DHCP request from going upstream? So beyond my subnet? An wHy would this Thompson thing be serving DHCP to begin with?

I am able to connect to the Internet if I connect to the Cable Router directly and using DHCP. I've also been able to connect to the internet via my PERSONAL router, using static ip adresses, but this is only temporary, after a while the connection goes down.

Any help is greatly appreciated!!


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✔ Best Answer
August 8, 2011 at 12:31:04
Problem solved today by UPC:

Turns out the problem came through the "ethernet cable" input on the UPC media box (the one connected to my TV) which I had connected to a switch hanging from my personal router. I assumed this was used to get TV program data or whatever and basically since it was there connected it. But its apparently used only for diagnostics and yes, serves DHCP! So simply disconnecting it solved it. I definately would not have guessed this by myself.

Thanks for your help anyway.



#1
August 7, 2011 at 09:31:09

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#2
August 7, 2011 at 11:32:49
Google searching "Thompson Cable Modem" images gave me a GUI match:

Thomson TCW750-4 - has the same user interface as my pages...

Anyone?


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#3
August 8, 2011 at 12:10:55
Downstream is a Cisco E4200 Wireless Router [PERSONAL ROUTER] (w. 4 port switch) serving 192.168.0.x adresses.

The problem is when I connect my client to the [PERSONAL ROUTER] it gets a 192.168.100.x adress (!!!!).

You state the "peronsal router" is server 192.168.0.x addresses and then are surprised that a client connected to that "personal router" get's an IP address in that subnet.

What part of that are you having trouble figuring out exactly?

Click on my name above in this response and read my “how-to” guide titled, “Add a second Router to your LAN

This details the two different ways to to connect a second router to a network. Version 1 is the preferred method for a setup like yours.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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Related Solutions

#4
August 8, 2011 at 12:31:04
✔ Best Answer
Problem solved today by UPC:

Turns out the problem came through the "ethernet cable" input on the UPC media box (the one connected to my TV) which I had connected to a switch hanging from my personal router. I assumed this was used to get TV program data or whatever and basically since it was there connected it. But its apparently used only for diagnostics and yes, serves DHCP! So simply disconnecting it solved it. I definately would not have guessed this by myself.

Thanks for your help anyway.


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#5
August 9, 2011 at 08:16:29
Thank you for getting back to us and letting us know the resolution. With luck, this will help someone else who comes here with a similar issue.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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