WAN port not detecting internet connection

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rahul247rocks

rahul247rocks

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Jan 14, 2010
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I live in India and I took Alliance Broadband. My internet works perfectly with my PC. However when I try to connect it to my 150Mbps TP-link Router it fails to detect the WAN connection. It's as if the ethernet is not detected at all and the green light for internet never flashes. I tested my router with my neighbor's connection having the same ISP and we both get our line from the same switch (a nearby lamppost). The router works perfectly with my neighbour.

the internet guy came today and changed the RJ-45 connector and even re-plugged my RJ-45 connector on the switch but the problem remains.

Since my work is primarily based on mobile devices like iPad and others I am looking for a desperate solution.

What could be wrong here. My ISP guy is even confused. The router is fine. The internet works fine with my PC...when I connect the ethernet directly to the PC port.

Please help me out guys. This forum is my last resort.

I did "hard reset the router" several times...upgraded and downgraded to different versions of the firmwire but the router would not detect my ethenet cable in any way.

Looking for some solutions from networking experts.
 
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Ra_V_en

Ra_V_en

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You didint describe how do you connect your ISP with the router, do you have a modem on the way or you are using ADSL router and connect directly to the line with RJ11?
Generally you can always log in to the router administration page and check whats going on.
Connect your PC with lan cable to the router and start browser.
Write 192.168.1.1 in browser and use admin as a login and password... here where the magic starts.
Btw if i remember correctly adress ive written is a default for most of TPLINK routers but if its not logging in to an admin page you would be need to check it from your lan card settings in windows. Its described as a default gateway.
Lots of informations needed to check whats going on but its some few first steps for you.




 
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rahul247rocks

rahul247rocks

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I have just an ethernet cable coming to my house from the local switch. This ethernet cable (when connected to my PC) works perfectly and I can login to use my internet. I connected this ethernet cable to the WAN port and then connected a LAN port from the router to my PC using another LAN cable. I know how to go inside 192.168.0.1 and I tried everything. The problem is that my main internet ethernet when connected to the Router won't get detected and the light won't flash. It's as if the router is failing to detect my ethernet altogether for the WAN port and the same router works fine with my neighbor's internet.

This is very confusing problem. I also thought that I had a faulty router but when checked with another internet connection it's not the router that is causing it. On the other hand the ISP ethernet works perfectly when connected to my PC using in-built motherboard LAN card. So what's going on here.
 
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Ra_V_en

Ra_V_en

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Indeed its weird but I'd bet on those 2:
- your ISP is blocking your router MAC address - easy workaround if you have a router with MAC cloning. Just write down MAC address from your PC LAN card then use it on the router. I have a 5 year old TP Link router so with this option available so I'm guessing yours will have that also.
- cable should or should not be a crossover, type "Ethernet crossover cable" in google to find out more - It rather unlikely reason but still valid.
 
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rahul247rocks

rahul247rocks

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Okay I tried MAC cloning but that did not solve. My ISP guy told me to call Alliance broadband and then tell them to unbind MAC to use wi-fi on multiple device. They did all that as well.

How to convert crossover to straight cable. I mean does the internet guy need to do it on both ends or something. I am not so experienced in networking so sorry if this question is a bit basic or foolish. I read there has to be the same color arrangements on both ends to make the line straight. Yesterday I think the internet guy (when re-inserting RJ-45) connector did cut a small wire from inside the CAT 5e line from my end. Oh man I gotta get him to my home and make him read this thread on Tom's hardware here.
 
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Ra_V_en

Ra_V_en

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Well its my last guess i could came up with. Most of the cards (if not all) now are able to check what kind of cable is used (straight or crossover) and make an internal swap of the lines. Most of the routers and switches also can do that, but i know its not a must and a it was typical issue few years ago.
To convert crossover to straight you need to cut the plug and install a new RJ45 plug with different line setup. You have multiple photos on google.

Can you provide a router model number, ill try to check if it has an option to recognize cable type.
 
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theanimer

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omg i m also facing the same problems as u r facing @rahul
and tried all the things which u already did apart from that i also brought a different router from my friends house and tried it on my connection it also didnt work.


please let me know also if u find a solution the router i m using is same as that of urs.
 
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theanimer

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ok finally got the solution to the problem


just ask for a crosscable and connect the isp device with ur routher through it

did the trick for me


check google for difference between crosscable and straight cable and you will know what i mean.


cheers
 
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jamesmcuk

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to me the original issue seems to be that the incoming internet enabled cable was plugged in to the WAN port of a router. He said that this incoming cable came from a switch not an ISP direct so had he plugged it in to one of the other ports on the router and not the WAN port it would probably of worked. Maybe this is what your issue is Palas?
 
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devsigns

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Hi Rahul,
Is your problem resolved?

I am facing exactly the same problem. I have a BSNL wimax connection. I get input from a terrace antenna to a modem. An ethernet cable is then connected between the modem and the laptop. My internet works perfectly fine when the ethernet cable is plugged in directly to the laptop.
I have also got a TP-Link TL-WR841N 300Mbps Wireless N Router. When I plug in the output from the modem (OX253P) to the WAN port(blue) on TL-WR841N my internet worked for a week via the wifi router, without any configuration.

My internet service went down for a week due to a fault. When it was restored, the internet via the modem to laptop(via an ethernet cable) works but doesn't work when I give the output of the modem(OX253P) to the wifi router WAN port. I have tried resetting both the wifi router and the modem, MAC cloning etc but nothing seems to help. Also disabled DHCP on wifi router but no joy.

The WAN light turns off as soon as I connect to the modem via the ethernet cable. I have a feeling that something isn't right with my modem.

If you have resolved your issue, please let me know how.

Regards.
 
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Sachin_5

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finally got the solution....ask your isp guy to cut off the rj45 cable end and rearrange the wires like this:-white-orange,orange,green-white,blue,blue-white,green,brown white,brown respectively and then reinsert the wires in rj45 end again...your problem is solved now
 
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Hoc___

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I have same issue now with my Wimax . Works on pc but not on router. What to do ? please tell anyone . My router shows internet disconnected. All was working fine for 2 years.
 
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