[SOLVED] Wifi works, Ethernet doesn't

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bm20

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Jan 21, 2019
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I have an Asus RT-N56U router. All the wireless connections work fine. None of the 3 wired connections work anymore. Laptop, DirecTV media, Xbox One all stopped working. Tried updating firmware on router and completely resetting the router. Tried a second laptop, same issue. Switched cables/ports, no difference. Doubt it is just a computer issue as other devices have same problem. Can't figure out whats wrong.
????
 
Solution
Vic 40
Only thing i can think of is that the cable between modem and router is't good or maybe the wan port. Can try to connect it to a lan port,see if the other ports get a signal like that,but it may be necessary to get another router.

Guess you have tried the advanced options within the routers software.
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Power, but I also did a factory reset and had to set up my network again from default.
 
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Direct line from modem to computer works, yes. I think its narrowed down to the ports on the router not being recognized for some reason.
 
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Cable from the modem goes into the WAN port?

Just questions ... i know,trying to get the big picture. Internet isn't what i'm best (mostly deal) with so try to get as much info as i can.

My thoughts are that they somehow are switched off,which maybe is something you can enable again within the routers software or that they somehow are just busted and you might need a new router. Only way to test that for sure is with another router.
 
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The wire coming from the modem feeding the router, I unplugged it from the router side and plugged it into the computers ethernet port. Modem-Computer works.
When I plug it back in normally (Modem - Router - Computer). The green lights near the router ports come on, but in the computer internet setting page, the Ethernet connection says "Unidentified Network, No Internet"

I've tried looking through the router settings, nothing jumps out at me. But I'm not exactly an expert here so I don't know. Its just strange that all 4 wired ports just stopped working one day.
Appreciate the help.
 
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When plugging cable from modem to router you put it in the WAN port?

2Yb8sAu.png

 
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When I log into my router settings and go to the LAN page, under LAN IP, IP Address is listed 192.168.1.1
IPConfig /all under Ethernet adapter ethernet. Default Gateway is BLANK

 
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I changed it and it nuked my internet for a while. I had to figure out how to switch it back for everything to work again.

On the front page of my router settings it lists clients as between 4-9 different connections (computers, ipads, phones etc)
 
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I'm sorry.
I'm looking at this,
https://dlcdnets.asus.com/pub/ASUS/wireless/RT-N56U/E6486_RT_N56U_Manual.zip
it comes with certain pictures which do seem helpfull,but guess it can be wrong. There's for instance a part called "managing your network clients" where you can check whether some are blocked also it says how to set up your network,one picture when done looks like this,

l0PKBUg.png

circled why i asked to change that ip adress,wasn't just trying stuff. 😉


 
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I appreciate the attempts at help.
I have a feeling I am going to end up looking for a new router. I was just hoping there was some weird setting I could just "turn on" and have the wired ports recognize the connections again.
 
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Well they are laptops, connected wirelessly. The one sits at the desk right next to the router. It usually connects by wire and has no connection that way, but is hooked up to wifi for it to work right now.
 
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Only thing i can think of is that the cable between modem and router is't good or maybe the wan port. Can try to connect it to a lan port,see if the other ports get a signal like that,but it may be necessary to get another router.

Guess you have tried the advanced options within the routers software.
 
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Solution

Honestly, it sounds like a bad router. If it were a bad cable between the modem and router, or a bad WAN port, you'd expect the wireless connections to be affected as well. He's reporting the wireless devices are working fine.

He reports his devices work if he plugs them straight into the modem, so it can't be a problem on the devices.

It's unlikely to be a bad cable or LAN port since he's experiencing it on multiple devices on multiple ports with multiple cables.

That leaves a bad router as the only remaining possible cause. It might have been a software or configuration problem with the router. Except he's tried factory resetting it and upgrading the firmware, which should have cleared up any software problems. The only other possible thing I can suggest is a 30-30-30 reset of the router. Followed by hitting the restore button and power cycling as described here.
https://wiki.dd-wrt.com/wiki/index.php/Hard_reset_or_30/30/30

If that doesn't work, the only remaining possible culprit is failing router hardware. I keep an old obsolete router around specifically to test for this case. I know the old router works, so I can just swap it in to quickly determine if a problem is being caused by another router.
 
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