I upgradaed to full fibre 900 and the speed is very inconsistent over Ethernet

[mrhuk]

 I had full fibre installed on the 3rd of Feb,  and for the first week or so I was getting 930Mbps solid, but for the past few days it has been varying between 700-850Mbps. I know the "stay fast guarantee" is only 700Mbps, but losing  at times 230Mbps doesn't seem right to me. 

I've tried 3 different CAT8 cables, from 3 different brands (overkill, I know) and it's the same. The strange thing is I'm getting almost the same speed via wireless on my iPhone 16, whereas when it was originally installed Ethernet was about 200Mbps faster than wireless. I have installed the latest drivers for my network card, and disabled all energy saving features. 

I had to unplug the ONT once and I'm wondering if that could have caused the drop? I know there's a line training period of about a week or so, and I hope I didn't hurt myself by having to unplug the ONT during that period. My line has been rock solid stable.

I've also been having an issue where it will say the Ethernet cable is not plugged in, when it is. So either the Ethernet port on my motherboard is failing, or it's a fault with the Pro router. I have a very high-end motherboard that's less than a year old, so I doubt it's that.

[JimM11]

@mrhuk That is all an Openreach publication lock stock and two smoking barrel's....

[bobpullen]

@mrhuk - have you tried running a speedtest using the EE App (found under the 'WiFi Controls'/'Broadband' section)? Does that return similar results?

Don't suppose you have the 'WiFi Optimiser' feature enabled in the App? If you do, have you tried running the 'Ping Optimiser' feature again?

[mrhuk]

The speedtest on the app is much slower as that's wifi. I have wifi optimiser enabled for streaming as I use wireless for streaming on the Fire Stick in the bedroom. I ran ping optimiser again and it went from 6ms to 3ms. I mostly use the PC via Ethernet so that's my main concern, the wifi has been fine for what I use it for. 

[JimM11]

@mrhuk The app speed test shows you TWO values, the speed to the ROUTER, and the speed to the DEVICES!

[XRaySpeX]

That speedtest confirms your BB is running at 927 Meg, well above your 700 Meg guaranteed.

The app is running on a WiFi connected device & would be expected to be lower.

Try a speedtest, preferably wired using an Ethernet cable supplied with the router, here http://www.thinkbroadband.com/speedtest.html . Click on the "Results Page" button at the bottom of the graph you first see and then copy to here just the "Link to this result:" link that you see below the next main graph.

[frustrated28]

Same problem here and I've just spent some time troubleshooting it (I am a former network engineer). We have 900mbps fibre and WiFi works at full speed consistently, but the Ethernet connections will only perform at 80mbps to 90mbps no matter what. This includes the Ethernet ports on the BOTH the Smart Hub 7 Pro and (believe it or not) the WiFi Extender 7 Pro.

Tried different cables, plugging computers directly in to the Hub and Extender's Ethernet ports, etc etc. I even connected a couple of TP-Link mesh devices via the Hub's Ethernet.

The results were, under all conditions, that WiFi speeds maintained circa 900mbps and every Ethernet test only reached 80-90mbps. (there is also occasional Jitter on the Ethernet tests too)

Both are on the latest firmware (Feb 2026): r3.8.24-R-1531355-PROD-1

So it has to be a firmware bug causing the problem for both the Hub and Extender to develop the same problem at the same time. I will open a support ticket with EE and see how long it takes them to fix it!

[Leanne_T]

Morning @frustrated28 

Thanks for coming back to the community. 

If you can get in touch with our broadband tech guides, they will run checks at our end to see what’s happening with the ethernet connection to see what is needed to get this resolved. 

Let us know how you get on.

Leanne.

[JimM11]

@frustrated28 As your wan connection is up there at the 900Mb/s that is well good, so nothing wrong with the connection from your Hub/ONT that way, the lan is way different and should be no reason to be clamped down at the 100Mb/s sync speed on every connection Hub/Smart Wireless devices, and with multiple connections, could see that if you were using the same device for connecting with a bad cable or bad network profile on the device....

The 7 Pro did suffer slightly with the Ethernet connection so may be worth trying a Gigabyte switch buffer if you have one lying around to test with! Also reported earlier that the 2.5Gb/s ports were cable sensitive, never used so cannot comment with that!