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jenniferrr's profile

New Member

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26 Messages

Sunday, April 10th, 2022 1:29 PM

Ethernet - Router not assigning IP addresses to some devices.

Hi there, 

I have ATT Fiber, and everything was working fine until two days ago. Now two computers in my home (1 Mac and 1 Windows) will no longer connect via Ethernet and receive the error "Ethernet has a self-assigned IP address and will not be able to connect to the Internet." - both computers will connect wirelessly, but I need them connected via Ethernet for my work. 

Other wired devices to the network work fine, wireless is  the wall jack is working fine, the computers are fine (Contacted support for each after Customer Support told me it was an issue on my computer). 

When I first notified support I was sent a new router, but the problem persists. I asked if they could update router settings, but was told the connection was working fine and the issue was the ports on my computers. Both devices are brand new and working fine. Confirmed this is a router issue with both of my computer manufacturers yesterday. 

Each of the computers are connected via an internet switch, which was installed by the ATT Tech who installed the service. Service wires are about 5 months old as this is a new home. (Just trying to give all the details here) 

Steps taken to troubleshoot: 

New router installed

Renewed DHCP Lease 

Tested Wall Jack 

Tested other ethernet connect devices (working normally) 

Troubleshoot with both windows and mac tech team to verify devices are operating fine. 

*NOTE Computer will connect via Ethernet if manual IP address is entered, but need correct one to work properly 

Can someone tell me what settings in the router need to be adjusted to get these working via ethernet again? 

New Member

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26 Messages

2 years ago

Understood. 

I was able to get the Windows computer to connect once, but now it will not. It says "Ethernet does not have proper IP address" - the iMac never has been able to connect and says "Self Assigned IP address - cannot connect to the internet" 

(edited)

New Member

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10 Messages

2 years ago

I've tried to avoid asking questions the other support techs should have already asked like, have you run the network troubleshooter in windows? What are the ethernet IP settings, and if they aren't dynamic (get addresses automatically) what are they? The IP address for everything on the local network need to be different, are they? I'll answer questions as best I can, but as you're finding out the problem can be hard to find.

New Member

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26 Messages

2 years ago

I really appreciate your help! 

I have ran the troubleshooting in windows and connected to a live tech for my Mac through Apple (they advised this is a router issue). 

IP settings are the same for each computer, using DHCP to auto populate the addresses. 

(edited)

ACE - Guru

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9.9K Messages

2 years ago

@jenniferrr   Which AT&T Gateway do you have?  If it's the BGW320, try doing a factory reset (hold down the Reset button on the gateway for >15 secs).  We've just recently seen a user with the 320 have bizarre wired LAN connection issues and the reset fixed that.

Be aware that the reset will wipe out all of the configuration changes you may have made to the gateway so make a note of anything you might want to re-enter afterwards.

New Member

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26 Messages

2 years ago

@tonydi Thank you for the reponse! I do have a BGW320 - just tried the reset and the issue is still occuring.

Everything else seems to be working fine. 

Just to add, both computers connect wirelessly - it's just the ethernet on both that stopped working Friday morning. 

(edited)

ACE - Guru

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9.9K Messages

2 years ago

What happens if you connect one of the problem computers directly to the BGW320, taking the switch out of the equation for that system?

I don't know what switch AT&T supplies.  Have you tried plugging it into a different port on the BGW, especially if you have it connected to the blue 5Gb port?

New Member

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26 Messages

2 years ago

When I plug my iMac directly into the wall jack it has the same issue. Unfortunately it is too large for me to transport to a different area in the house to try other wall jacks. 

The Windows machine will intermittently connect via the wall jack in question, sometimes it will, sometimes throws the IP address error, but connects to via Ethernet via other wall jacks in the home.

For information sake, the tech set up three switches in my home, one in the living room, the office and rec room, so they are not directly connected to the BGW. 

Everything besides these two computers works great, ha!

(edited)

ACE - Guru

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9.9K Messages

2 years ago

I think we're getting crossed up with the nomenclature.  An Ethernet "switch" is a multiple port device much like what you see on the back of the BGW.  It's essentially like a power strip where you have one input that feeds to multiple outlets, except in this case the switch sends Ethernet signals instead of electricity.  A switch needs to be connected to the gateway in order to give you a network and internet connectivity.

Can you post some pictures, like the back of the BGW so we can see what's connected, and then where those wires go before they leave the area and head out into the rest of the house to those wall ports?

New Member

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26 Messages

2 years ago

@tonydi, yes, the switch is exactly that. The way this house is wired is that everything runs to a switch which is then fed into the main cable to the router.

In the other rooms, there are items connected to a switch that feeds back into the hub that connects to the main cable connected to the BGW. At this time there is only one cable connected to the router. 

I originally thought the house was wired so each wall jack would feed into the router it's self, but it all goes to a "hub". 

ACE - Guru

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9.9K Messages

2 years ago

But you're talking about multiple switches in one instance, but a single "hub" (switch?)

connected to the BGW in another sentence.

Pictures would really help me out here.

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