topic Re: 40% speed drop overnight in Broadband

40% speed drop overnight

alphabet73 — Wed, 03 Jul 2024 16:05:46 GMT

My connection has been a beautifully stable with the router reporting a downstream sync of around 68Mb but something happened around 10:30 last night when the sync dropped to around 40Mb and it's been sat there ever since.

Before I start down the fault route, what's the current troubleshooting advice in terms of resetting the line sync? I remember back in the day it used to be unplug the router for 10-15 minutes to allow sessions to time out etc., is that still the recommended method?

Thanks

John

Re: 40% speed drop overnight

jab1 — Wed, 03 Jul 2024 16:11:13 GMT

@alphabet73 Did you note any change in the Hub/routers lights at the time? I doubt a resync would solve this.

Re: 40% speed drop overnight

jab1 — Wed, 03 Jul 2024 16:45:32 GMT

I suspect, from that excerpt, that you had a drop in your xDSL connection. Thanks for that snippet, but could you export your full error log and attach it to a reply - there may be more information in there that may be of interest?

Re: 40% speed drop overnight

alphabet73 — Wed, 03 Jul 2024 16:47:27 GMT

Exported log attached...

Re: 40% speed drop overnight

jab1 — Wed, 03 Jul 2024 16:51:41 GMT

@alphabet73 We actually need your error log - not the data you have supplied.

Re: 40% speed drop overnight

alphabet73 — Wed, 03 Jul 2024 16:55:25 GMT

Doh! That's what I get for trying to multitask...didn't realise I was on the wrong tab when I hit Export!

Try this...

Re: 40% speed drop overnight

corringham — Wed, 03 Jul 2024 17:06:15 GMT

The log appears to show connections on different dates with download at various rates between 80Mbps and 21Mbps, so it may not have been as consistent as you believed.

The current stats (in your first log) show a max data rate of 42.4Mpbs with a 3.3dB noise margin - that suggests your connection is not banded, and that is the max rate attainable currently. You need to report a fault.

Re: 40% speed drop overnight

alphabet73 — Wed, 03 Jul 2024 17:10:05 GMT

Thanks @corringham , I'll get a fault raised.

I'm guessing I must have just timed my speed tests well to see the higher speeds as certainly didn't see the slower ones before today.

Re: 40% speed drop overnight

jab1 — Wed, 03 Jul 2024 17:11:48 GMT

As I suspected, you had a DSL drop for some reason, and whatever the reason was, the DLM decided your connection needed throttling to maintain stability. I suggest you call in and ask Support to reset your line - it should reset to your 'normal' speed.

As a point of interest, your DS SNR is a little low for your attenuation, which may account for the severe drop.

Re: 40% speed drop overnight

jab1 — Wed, 03 Jul 2024 17:14:35 GMT

Good spot, @corringham - the OP certainly has a problem.

Re: 40% speed drop overnight

Anunnaki — Wed, 03 Jul 2024 17:18:30 GMT

Re: 40% speed drop overnight

corringham — Wed, 03 Jul 2024 17:26:44 GMT

@jab1 wrote:

... the DLM decided your connection needed throttling to maintain stability.

but I believe in the case where the DLM reduces the speed to improve stability there would be a max speed well above the actual rate, and a large DS SNR.

From the logs this doesn't look like a particularly unstable connection that would be throttled.

Re: 40% speed drop overnight

Dan_the_Van — Wed, 03 Jul 2024 17:28:17 GMT

@alphabet73

I take it you're running a couple of servers on 192.168.5.254 as there are many external connections on port 80 and 443, 192.168.5.60 external connections on port 4040 and 32400.

Re: 40% speed drop overnight

jab1 — Wed, 03 Jul 2024 17:30:16 GMT

@corringham wrote:

@jab1 wrote:

... the DLM decided your connection needed throttling to maintain stability.

but I believe in the case where the DLM reduces the speed to improve stability there would be a max speed well above the actual rate, and a large DS SNR.

From the logs this doesn't look like a particularly unstable connection that would be throttled.

All those earlier drops, which I admit I missed as I didn't do my usual fault isolation, would have caused the last apparent reduction.

Re: 40% speed drop overnight

alphabet73 — Wed, 03 Jul 2024 20:43:48 GMT

And problem solved...seems there was an 'event' which may have impacted multiple users (not sure what the event was as support had no additional info).

One remote reboot of the router later and sync speeds are as they were before whatever caused last nights blip.

Thanks for everyones input.

John