Upload speeds dropped by 50%

Does anyone have any ideas on how to troubleshoot this further?

First what is the exact eero router model that you have behind your AT&T Gateway. What model AT&T Gateway do you have and how have you configured your eero router? Are you using IP/Passthrough mode setup?

I now wonder if ATT is throttling my upload speeds or if something on the network has broken.

No AT&T does not throttle your upload or download speeds, Why would you think this? This is not Cable internet.

Dave

Dave,

As mentioned, I have an Eero Pro. The gateway is a BGW210 in passthrough mode. The setup is correct. It has been working at full speed since September of last year. I do not know if it's a throttling issue, but something happened around May 12th that dropped my upload speeds by 50%. Configured electronics rarely stop working correctly unless an electrical component goes bad. Usually, problems with properly configured systems are the result of software updates or changes. Nothing changed on my home network, and my Eero was working fine prior to its latest software update, which occurred several days after the problem was discovered. I have no idea if the BGW210 has had any updates during this period or if something further up the line was updated or changed. I have done as much troubleshooting as I can on the equipment inside my house, and it makes sense it wouldn't be in the house if nothing had changed.

There is a simple way to test your issue. Are you able to connect a device using Ethernet to your BGW210 and test to https://www.speedtest.net

Then connect the same device back to your eero Pro (unknow model information) and run the same test and post the results.

Dave

Today, I saw that the speeds had returned to normal. Speed tests through the Eero app and speedtest.net showed speeds up and down back in the 900s. Nothing changed inside the house, and no software updates were applied to the Eero. I will probably never know the cause, but something upstream of my gateway appears to have been the culprit, leaving me with slow upload speeds for about 25 days. I will keep an eye on it, but this is the first time since switching to fiber that I've had any issues. It has been remarkably reliable and consistent otherwise. I will chalk it up to coincidence that the problem was resolved the day after posting a message here ;-)

In fairness I can see network changes on Att side being a thing.  It happens to me, with no explanation of course.  The impact of the changes on the network side are visible using tests within the gateway’s management console.  The changes come and go.  In general it’s difficult to quantify seat of the pants impact as there’s no actual outage and performance is acceptable, and not enough of a concern yet to take action on.  The main data collection I suggest should focus on the gateway itself.  If there’s enough there to work with, perhaps it can be taken up the line.  

Gr8sho... I agree. Network repairs or updates are a thing, and issues like speed degradation aren't always obvious. It would take a lot of tech support interaction for someone to acknowledge it's a real problem. Whatever happened in this case, the repair/upgrade seems to have rectified the problem without me attempting to push it further up the tech support chain.

Or there was a networking issue somewhere in the internet that took some some time to be discovered and repaired. Either on the Att side or outside of Att.