r/QuantumFiber

Im at a loss of what to do. I just had quantum fiber installed at my house and I have the 2 gigabyte plan. Previously I had xfinity 1 gigabytes and when my PC was connected to ethernet it would reach speeds of up to 800/mbs. Now with the new router installed I am plugged directly into the 10g LAN port but there is an amber light active, and my speeds seem to be capped at 100/mbs.

My Motherboard is the MSI MAG Z790 TOMAHAWK MAX WIFI. I have tried the following fixes recommended by google AI -

Purchased a new Cat6A ethernet cable

Completely uninstalled Intel ethernet driver and reinstalled directly from Intel and then updated through MSI Center. My Ethernet Controller is I225-V and it is updated to version 2.1.5.10

I tried to utilize the 1G LAN port instead to see if it would work and set the "Speed and Duplex" setting to 1.0 Gbps Full Duplex under Advanced Settings but still I was capped and getting 93-95/mbs

I ran the following "Terminal wipe" code using the command prompt - netsh int tcp set global autotuninglevel=normal

Nothing has worked and I remain capped at around 90/mbs. The AI is recommending next that I purchase a USB-C to 2.5G Ethernet Adapter such as the j5create or Plugable brands from BestBuy

Does anyone have any advice for me on what I can do to bypass this cap and allow my PC to utilize the full 2 gbps download and upload speeds? In the Quantum Fiber app it shows that my home is receiving the full speed. I really dont want to throw in the towel and go back to Xfinity but if the Ethernet Adapter doesn't fix it I will be completed lost.

Any help is greatly appreciated.

I have noticed that a Unifi gateway I manage for a family member offered that IPv6 was now available on WAN1. I clicked on it and it just automatically enabled it without a popup. Their network is vanilla, so I imagine this will be a benign change. However, they have been complaining about some periodic slowness, and I'm wondering if the stuff I have been reading about Europeans suffering slow IPv4 when IPv6 is available is happening here.

Most things I read about IPv6 are Europeans complaining that too many things do not yet support IPv6, or others complaining that IPv6 is just adding complication to a network if you have anything more than a vanilla setup. However, most of the posts saying IPv6 is not worth the hassle are from 2020-2021. I'm not seeing much in this space in 2025-2026.

First, it is surprising that Quantum Fiber is enabling IPv6 and I'm not reading much about it. Second, I'm wondering if now is the time to get on the bus, or just hold tight. Any strong opinions out there?

IPv6 Popup in top left of Unifi Gateway Dashboard

Above is a screenshot of the IPv6 announcement. Note that the screenshot is for a different system that is using Comcast. The announcement is no longer available on the system with QF.

Since getting quantum fiber, I been getting weak security error messages on multiple devices , connection constantly drops every 10 minutes. Beyond frustrated has anyone experienced this issue and how did you fix it? Bc Ive tries to chat with their team agents and they keep telling me theres no way to change the security settings.

Hi!

Has anyone been switched from AS209 to AS7018 that was a legacy QF customer? I remember reading that the rollout would be regional, but it’s unclear if it’s begun yet.

It’s a little thing, but native dual-stack IPv6 is the thing I’m most excited about.

Thanks!