topic Re: Router Interference in Fibre

Router Interference

GraemeMcD — Fri, 30 Jan 2026 17:44:04 GMT

Seem to be getting some kind of interference on the Router (Wifi Hub).

Generally Fibre35 gives me a solid 12-17 Ping with 30Mbps down 6Mbps up.

However I keep getting intermittent drops to 500+ Ping with single figure Mbps down and less than one Mbps up. Particularly noticeable on XBox with online games dropping out or lagging badly.

Tried both Wifi and direct Ethernet connection between Xbox and Router and it seems to persist.

I may have narrowed it down to either or both of TV (older plasma) and/or Sky HD box but it's so intermittent its difficult to be certain.

It also happened a couple of years ago and a replacement router seemed to fix it until now, could it be this replacement router has developed a similar issue?

Grateful for any ideas!

Re: Router Interference

KeithFrench — Fri, 30 Jan 2026 21:50:03 GMT

Can you send me a trace route of this in a PM to me (to preserve your privacy), then I should be able to prove where the fault is?

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KeithFrench is one of our valued Community Stars and can help with a range of issues related to wireless and networking. At times, he may ask you to send him test results via a Private Message to help analyse/diagnose an issue. Although Keith does not work for TalkTalk, he very kindly shares his time and knowledge to help others.

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Re: Router Interference

GraemeMcD — Fri, 30 Jan 2026 23:52:20 GMT

will do

Re: Router Interference

GraemeMcD — Sun, 01 Feb 2026 13:54:03 GMT

Here’s a couple of Speedtest App tests, the first with the high ping problem and the second without.

Re: Router Interference

KeithFrench — Sun, 01 Feb 2026 15:11:01 GMT

The strange thing here is that the two trace routes (bad & good) are resolving different IP addresses for the destination xboxlive.com. I am waiting on the customer to do some more tests for this. In light of the differing speed test results in the previous post, there may be more than one issue here. Once I know more, I will ask TalkTalk to resolve this for you, telling them exactly where the problem lies..

Re: Router Interference

KeithFrench — Sun, 01 Feb 2026 22:10:30 GMT

Just to summarise some diagnostics I have been doing with the customer via PMs. The problem initially at least, looks to be when the latency is OK, a trace route for the distant URL resolves to one IP address & when bad it resolves to a different IP address, causing the route through the internet to change. This might be a TalkTalk network DNS server issue.

This is what I have asked the customer to do:-

Try Google DNS instead (8.8.8.8 & 8.8.4.4). Log into the router & go to:-

Dashboard > See internet settings > Manage advanced settings > Internet connectivity > DNS IPv4

To use different network DNS servers (Google DNS in this example), change the DNS dropdown box to Manually Specify DNS. Then set DNS 1 & DNS 2 to the Google DNS IP addresses above.

Re: Router Interference

nambuso-TT — Mon, 02 Feb 2026 07:16:54 GMT

Hi there @KeithFrench Thank you very much for assisting the customer.

@GraemeMcD Please attempting to do anything, please confirm if the above steps helped in resolving your issue Thanks

Re: Router Interference

GraemeMcD — Mon, 02 Feb 2026 15:11:34 GMT

Ok - I've manually changed DNS IP4 DNS 1&2 to 8.8.8.8 and 8.8.8.4 as advised.

Guess it's just a case of monitoring now?

Presumably this will highlight an issue with Talktalk DNS servers which will need addressing and once that's done I change back to auto-select?

Re: Router Interference

GraemeMcD — Mon, 02 Feb 2026 15:19:52 GMT

Do I need to reboot anything - ipconfig/all still showing DNS 79.79.79.79 even though router dashboard says 8.8.8.8??

Re: Router Interference

KeithFrench — Mon, 02 Feb 2026 15:20:42 GMT

Hi @GraemeMcD

Please can you disconnect your PC from the WiFi & then reconnect it & then PM me again with the ipconfig /all command. The easiest way is to select all of the text in the commands output & use Ctrl+c to copy it to the clipboard.

Re: Router Interference

KeithFrench — Mon, 02 Feb 2026 15:24:21 GMT

Hi @GraemeMcD

Our last posts crossed in the ether! I have seen this with another customer. In that case, in the router, go to:-

Dashboard > See Wi-Fi Settings > Manage Advanced Settings > TalkTalk Wi-Fi Hub > DNS

You will find the 79.79.79.79 addresses there. Delete them both and replace the primary one with 192.168.1.1 or, if you have changed it, the new IP address of your router.

Re: Router Interference

Philile-TT — Mon, 02 Feb 2026 15:35:10 GMT

Thank you @KeithFrench

Re: Router Interference

GraemeMcD — Mon, 02 Feb 2026 15:43:30 GMT

Disconnected and reconnected.

Tried to pm the details as requested but apparently I've reached the limit on the number of pms I can send and need to try later!

You would've seen the router network page showing DNS 8.8.8.8 & 8.8.4.4 and the ipconfig/all showing DNS 79.79.79.79 & 80

Re: Router Interference

KeithFrench — Mon, 02 Feb 2026 15:55:34 GMT

Hi @GraemeMcD

Look at my post #11 that will sort it.

Re: Router Interference

GraemeMcD — Mon, 02 Feb 2026 16:03:40 GMT

that's all done.

ipconfig/all now shows DNS servers 192.168.1.1

Re: Router Interference

Philile-TT — Mon, 02 Feb 2026 16:12:27 GMT

@KeithFrench Thanks for helping out.

Re: Router Interference

KeithFrench — Mon, 02 Feb 2026 16:13:13 GMT

Perfect!

I think there was a previous firmware update, but I can't remember which. It wrongly set the router to have the TT network DNS servers assigned to each client via DHCP. The correct way is to tell your PC to use the router as its DNS server and the router talks to Google DNS for any queries that it cannot answer itself.

Re: Router Interference

GraemeMcD — Mon, 02 Feb 2026 16:29:11 GMT

Ok, will monitor and see how it goes with the xbox online gaming dropout issue.

Thanks for your help.

Re: Router Interference

Mandisa-TT — Thu, 05 Feb 2026 07:01:15 GMT

Hi @GraemeMcD You welcome, please keep us updated on how it goes.

Re: Router Interference

GraemeMcD — Thu, 12 Feb 2026 18:06:04 GMT

UPDATE:

Monitored things for a week and we're still getting online gaming lag and dropouts with ping spiking (particularly upload ping around 2000+)

Over the last couple of days the router has also started to disconnect devices (iphone/firestick etc) either overnight or upon returning home and they won't reconnect unless the router is restarted. Have TT made any remote changes or updates to cause this?

Must say these ongoing and new issues are extremely frustrating and given I'm just out of contract I'm considering other options.