Available Now: Buy the new iPhone 14, iPhone 14 Pro and iPhone 14 Pro Max from AT&T!
Get superfast AT&T Fiber internet
kpmont1234's profile

Tutor

 • 

7 Messages

Sun, Aug 6, 2017 8:13 PM

Slow speeds on new AT&T Fiber

I had AT&T Fiber installed last week and have been having slow speeds. I'm using a Linksys EA9300 in DMZ Plus mode behind the RG (Pace 5268AC) and turned off IPV6 on the Gateway. On a 5GHZ network from the Linksys, I am only getting around 75-80 Mbps. If I connect to the AT&T Wifi on 5GHZ, I get 300-375 Mbps. Why is the Linksys being slowed down? I did get 400 Mbps on the Linksys right after the Fiber was installed, but then it went down to the 75 Mbps after a few minutes. Are there any other settings that I may need to change? I've already Reset both the RG and Linksys to Factory Default and set them back up again. Thanks. 

ATTHelp

Community Support

 • 

200.5K Messages

5年前

@kpmont1234, sorry to read about the issues that you're having with the Internet speeds.

[Edited - Contact AT&T for account specific questions.]

EricG AT&T Social Media Manager

Tutor

 • 

7 Messages

5年前

So I seemed to have fixed the issue for now. When searching for a solution on the slow speed prior to my original post, a forum post suggested I change the Wired Ethernet Switch mode from Auto-Detect to 100BaseT/Full-Duplex for all Ethernet ports. But every speed test I did from multiple websites on different devices kept capping at 75-80 Mbps. Even a hardwired connection from my laptop to the Gateway showed 80 Mbps. So I changed it back to Auto-Detect and the Gateway rebooted. I'm now seeing the faster speeds promised both wired to the Gateway and on WiFi. 

 

After I did the reboot, the Data light on the Fiber ONT box changed from green to pulsating Orange. Anyone know if this is an issue? I've contacted AT&T to see if this is a problem and will update. 

Tutor

 • 

7 Messages

5年前

UPDATE:

After a couple of hours, the speed has gone back down to 30-75 Mbps Download and 35-80 Mbps Upload over WiFi. A wired Ethernet connection to the Gateway gets over 800 Mbps on Both. I feel like it has something to do with the Ethernet connection from the Gateway to the Linksys. I have a Cat6 cable connected between them, but I think the Gateway might be having issues with the Auto-Negotiation. I'm still waiting to get a reply from AT&T about this issue.

ATTHelp

Community Support

 • 

200.5K Messages

5年前

Can you hard wire a computer directly in to the back of our router bypassing any 3rd party routers and test for us? AT&T Community Specialist

Tutor

 • 

7 Messages

5年前

Wired directly to the AT&T Gateway I get around 700 Mbps Down and 800 Mbps Down. 

ATTHelp

Community Support

 • 

200.5K Messages

5年前

We can get get a tech out on this. What date and time frame 8:30 am - 12:30 pm, 1 pm - 4 pm or 4 pm - 8 pm is good for you? AT&T Community Specialist

Tutor

 • 

8 Messages

5年前

kpmont, 

 

Turn off the anti-virus/security gateway software that is likely throttling your speed. Do this initially for testing; afterwards, maybe you can re-enable it and white-list the connection? If it can't white-list, keep it off and find an alternative that won't affect your bandwidth throughput. After disabling (and assuming you even have an anti-virus), you should see ~940Mbps/940Mbps speed.

 

Take care.

Tutor

 • 

7 Messages

5年前

I do not have any Anti-Virus software running (I've been testing my speeds on a 2009 MacBook Pro, 2015 MacBook and iPhone 7 Plus). BUT, after a few days of leaving my set-up alone, the speeds on my 5GHZ WiFi coming from my Linksys router seems to have improved. I've been getting 300 Mbps Down and 200 Mbps Up. It has been pretty consistent. It will sometimes dip into 100-150 Mbps Down range, but will eventually go back up. The ONT Data light is still pulsating Orange, and I still don't know if that is an issue. 

Dgaxe1987

Employee

 • 

69 Messages

5年前

@kpmont1234 the ont data light color shows what kind of speed profile you are set to. green is anything under 100. should be orange 100 or higher. perhaps the ONT port on the RG setting was changed to 100mb which caused the green light.

Contributor

 • 

2 Messages

5年前

I just transitioned off Comcast to AT&T Fiber 1GB. The first impression is very bad. With Apple AirPort Extreme latest version at 5GHz I’m getting about 70 MBps. Connecting directly to AT&T WiFi router I get about 200 MBps. The technician simply advised that this is perfectly normal. Now I feel really stupid making the decision to move to AT&T without making detailed research. I’ve trusted too much their ads. If anybody has any suggestions, please share... thanks!
JefferMC

ACE - Expert

 • 

29.9K Messages

5年前

200 MBps would be excellent on any 1 Gbps connection.  I would have only expected 125 MBps.

 

192kHz

Employee

 • 

540 Messages

5年前

@MartinRS " Now I feel really stupid making the decision to move to AT&T without making detailed research. I’ve trusted too much their ads"

AT&T does not and can not guarantee WiFi speeds, read the ToS again, there is a part on WiFi. There are to many variables. The 1gbps is the hardwired speed that is advertised, this is nothing new. I have 45mbps at home (hardwired), wireless is less. When you jump to 1gbps the difference is MUCH more drastic, as not a single devices out there can get 1gbps over WiFi. You have a service that is brand new and cutting edge, and device manufactures have not caught up. It's like getting a 4k TV on day one, with no 4k TV content to watch.

 

Not sure why they sent a tech to "service" your 3rd party router. As you were getting gigapower speeds hardwired to our modem.

 

 

Contributor

 • 

2 Messages

5年前

I get the part about not getting 1 gig through the WiFi. The key point is that overall I get much less final speed with the fiber/1 gig compared to Comcast. The reason for the change was to improve the overall experience. There may be something wrong in the setup, but the AT&T engineer on the spot could not figure.
192kHz

Employee

 • 

540 Messages

5年前

 

With a gigapower account using WiFi your device will pull the maximum that it can.

 

Are you really telling me that with Comcast your device got faster than 200mbps over WiFi??

 

My work iPhone gets 300-400mbps over WiFi, new MacBook Pros get 400-600mbps, etc, etc.

It all depends on what the device is capable of.  

Contributor

 • 

1 Message

5年前

The computer is sitting 6" from the modem and I am measuring in Kb per second.  I used to get 300-800 MB per second.  Now I cannot even get Netflix to run.  This is a Fiber network and I am getting tired of always struggling with it.

Need help?
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.