This topic

Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 08:38:02 GMT

Hi,

I've upgraded to Full Fibre 900 broadband on the 12th October. My download speeds are pretty much as promised by BT. However my upload speeds are only ever 20Mbps. I have hard reset the router (SH2) a number of times and upload speeds come up to 40 Mbs for a couple of days before going back to 20Mbps again. When I plug my old router in I get upload speeds of 110Mbps.

I have digital voice and the 'unbreakable' EE router so cannot stop using the SH2 router to get around this. I was wondering if a patch could help resolve this issue with my SH2 as I have seen that this is a recognised issue amongst other users. Thanks.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

iniltous — Mon, 30 Oct 2023 10:55:48 GMT

The soft cap on the ‘upload’ on some SH2’s was 50Mb ( not 20 Mb ) and was normally removed automatically after the SH2 had been left connected for a few days ( an over the air update ) , it doesn’t seem like that’s the issue with your router , especially as you say a restart gives you 110Mb which then reverts to 20Mb .
Presumably you need to report this , in the first instance a new SH2 would be the obvious step ( given that you state a different router provides the correct upload ) if the replacement SH2 shows the same issues then it may need the actual active elements of the PON looking at ( your ONT , the headend/ OLT etc )

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 12:21:08 GMT

Thanks iniltous,

The problem is with the SH2 as my old hub shows normal speeds up and down when it is connected. The SH2 has only ever managed 50Mbps upload after a hard reset and not the 110Mbps that my old router has. I've seen a lot of people had this issue and it was resolved by the MOD's without a new router or engineer visit, which would be nice.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

imjolly — Mon, 30 Oct 2023 12:25:07 GMT

many posters with the 50mb upload problem had the problem resolved by as @iniltous just connecting the SH2 and leaving it connected for a few days with no intervention from openreach or mods

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

iniltous — Mon, 30 Oct 2023 12:42:58 GMT

Sorry , reseting your router temporarily gives 40Mb upload ( not 110Mb ) but that’s not really the point I was making , if your SH2 were affected by the software cap it would be a 50Mb upload limit ( a speed you haven’t achieved with your existing SH2 ) that suggests it’s not a software cap , it’s another ‘issue’ , potentially needing you to have a replacement router , if that fails to restore the upload , then the active parts of the network would be under suspicion.
I doubt switching the router off and on , hard resets , and even a forced software download will fix a hardware fault .
The chances are if you called to report this issue , the first port of call would be a replacement router dispatched, the new router is unlikely to be shipped with the old software cap.
I don’t really understand your reluctance to do this , if you want to pursue the software cap angle , as already stated leave your SH2 connected , when it’s automatically ‘polled’ if updated software is required it should update , if after a few days no change the BT Mods may be able to arrange a forced download if it hasn’t automatically updated, but it wouldn’t explain why your cap is 20Mb and not 50Mb , and why restarting the hub lifts it to 40Mb for a short time , basically your symptoms don’t align with that known ( and increasing rare ) 50Mb cap issue.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 12:55:25 GMT

Thanks imjolly,

The SH2 has been connected near continuously since it was fitted on the 12/10. Briefly disconnected 12 days ago to check the connection with my old BT home hub modem/router (which showed 700Mbps Down and 110Mbps upload) then it's (SH2) been left connected after a hard reset for over 10 days. Download speeds were 50Mbps straight after the reset now its 20Mbps.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 13:00:16 GMT

Thanks,

The SH2 did hit 50Mbps after the hard reset. Then down to 20Mbps. There was a period after when it was around 40Mbps but that may have simply been due to the fact I was testing the router some distance away.

Happy to report it, no real reluctance, but didn't want BT to send a new hub if that's not required, hence why I posted first.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

iniltous — Mon, 30 Oct 2023 13:04:33 GMT

TBH , all your ‘tests’ need to be from a wired device, not wireless, so distance shouldn’t be an issue

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 13:04:59 GMT

Sorry, last sentence should read "Upload speeds were 50Mbps straight after the reset now its 20Mbps"

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 13:06:44 GMT

All Macs here with no Ethernet ports so did them wirelessly

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

imjolly — Mon, 30 Oct 2023 13:13:35 GMT

you need to find some way to test speed using an ethernet connection as wireless is subject to so much interference that it cannot be relied on

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 13:26:54 GMT

Thanks,
I agree it'll be more accurate wired, just don't have equipment for that. It still doesn't explain the difference of 110Mbps with the old router and 20Mbps (with a high of 50Mbps) using a wireless test, a wireless test isn't that wide in its confidence interval for a test.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

imjolly — Mon, 30 Oct 2023 14:02:52 GMT

I understand what you say but the speed is at your router and the only acceptable test is using an ethernet connection direct from ONT to device

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

iniltous — Mon, 30 Oct 2023 14:54:15 GMT

TBH it’s not just a case of being more accurate using a wired connection, it’s the only credible measure , if you talk to support about ‘speeds’ and when questioned admit its wireless speed tests , they will not be interested, indicating the authorised BT speed test results , testing upto the ONT, the only guaranteed speeds.
It is odd why wireless upload is OK with your alternative router on your devices, but not OK with the SH2 on your devices, doesn’t in itself prove anything and doesn’t exempt your devices either .

If you don’t have a PC with wired Ethernet perhaps you have a smart tv with a speed test app to give another indicative performance test .

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Keith_Beddoe — Mon, 30 Oct 2023 15:09:00 GMT

The upload restriction on the SH2 was implemented when it became a problem on FTTC, where the SH2 was uploading more data than the equipment in the cabinet could process, so it caused the connection to drop. This was quite a while ago now, and is still the default, as a lot of people are still using FTTC,

A change was made to the default profile which enabled tighter flow control so that the FTTC equipment could cope.

With FTTP, this restriction is not needed, so a parameter change is send to the SH2, to lift that restriction. This should normally happen within a few days, provided the SH2 is recognised on the management system. If this does not happen, then it would need to be done manually, with the help of a moderator.

What is most likely happening at the moment, is that an initial fast upload is seen, until the flow control throttles it back to the 20Mbs restriction.

This is why a third party router is not affected.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 15:22:49 GMT

Thanks Keith_Beddoe,

I think you have hit the nail on the head. It's just my SH2 hasn't lifted the restriction after nearly 2 weeks, which seems a long time. I think I'll need the help of a MOD to get this done.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Keith_Beddoe — Mon, 30 Oct 2023 15:26:41 GMT

I have asked one to assist. Please leave the SH2 connected all the time, and do not factory reset it.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

DavidM — Mon, 30 Oct 2023 16:19:42 GMT

Hi @Jbaffoe and welcome back.

It's been a while but great to see you again. I can help you with the upload problem. I've dropped you a message so send over the details and I'll look into it. We very busy at present so it's taking a little longer than usual to reply but once you submit the details we'll get to you in turn.

Cheers

David

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 17:01:59 GMT

Thanks,

Will leave it alone until MOD says otherwise.

Re: Upload speed capped at 20Mbps by SH2 on Full fibre 900

Jbaffoe — Mon, 30 Oct 2023 17:03:22 GMT

Thanks David,
Will do.