topic Re: Banded / DLM Reset? in Broadband

Banded / DLM Reset?

bengutt — Mon, 11 Mar 2024 13:12:24 GMT

Hi,

My broadband dropped speed last year after we had some electrical work down. This involved turning the household power off and on multiple times over a day of two. I didn't think to unplug my router at the time.

I've seen on other posts that this can cause issues with banding and requires a DLM reset. How do I go about getting this done to see if my speed improves?

Thanks

Re: Banded / DLM Reset?

adamwalker — Tue, 12 Mar 2024 14:53:10 GMT

Hi there,

I've checked over your connection and it seems to be dropping out quite frequently so we'll need to get that fixed first before DLM can bring the speeds back up.

Have you noticed the router lights flashing orange at all?

Adam - Plusnet Sheffield

Re: Banded / DLM Reset?

bengutt — Wed, 13 Mar 2024 12:29:09 GMT

Hi,

I may not have been helping things as we've been turning the router off a few times over the last week or so for some work that needed doing.

I've had one drop off that I can confirm wasn't me that was around 2pm yesterday (Tuesday). I did notice on my DSL Status screen (Now I've been monitoring it) that the SNR Margin slowly dropped from 9 to 2 until it dropped off. It came back at 9 and has been sitting between 8 and 9 since then. The attainable rate floats between 76427 and 78666

I've not fiddled with it since then and will leave it for a few days. I do need to switch it off again at some point for the work to be completed, but I can put them off for a few days to see if it me or the system.

There is a new company supplying FTTP who have been working on the telegraph poles, cabinets and ducts in the area for the last month or so as well, so there could be disruption from that?

Re: Banded / DLM Reset?

ClaudiaG23 — Thu, 14 Mar 2024 14:16:27 GMT

Hi @bengutt I've run a test again on your line and unable to find a fault and I can see the drops in the connection are very few now.

Please get back in touch if you do feel there is still an issue and we can look into this further for you.

Re: Banded / DLM Reset?

bengutt — Fri, 12 Apr 2024 08:42:05 GMT

I've changed out the cable from the socket to the router and things have been a lot more stable now, I'm not seeing anywhere near the number of CRC errors previously. It's been up for nearly 25 days without dropping.

I still seem to be stuck at slower speeds than in the past though, both up and down, do I need to wait longer to see an improvement or does something need to be done at Plusnet's side?

Re: Banded / DLM Reset?

bengutt — Mon, 29 Apr 2024 11:06:57 GMT

@ClaudiaG23

My connection has been up for 41 days so far, and has remained at slower speeds than I was previously getting.

Will the rate change by itself? Does it need something changing by plusnet? Or should I just restart my router?

Re: Banded / DLM Reset?

MatthewWheeler — Mon, 29 Apr 2024 17:40:19 GMT

Hi @bengutt

I've tried requesting a DLM reset on the line for you

Hopefully you'll see a change in the next 24 hours

Re: Banded / DLM Reset?

Townman — Fri, 03 May 2024 13:44:57 GMT

@bengutt

Which router are you using?

If it is a Plusnet Hub One (a BTHH5a in different colours) then consider running the special version of router stats (see the link below) to keep an eye on the SNRM figures. The variability you reported is unusual and could indicate RFI - running router stats 24x7 could be helpful. Sample rate should be 10 second intervals, with 720 plots (2 hours) per graph. Only need to look at the SNRM plot.

Should if you need help configuring that.

The standard product works with other routers, but not the PN Hub Two.

Re: Banded / DLM Reset?

bengutt — Fri, 03 May 2024 14:20:41 GMT

The reset seems to have done the job. My connection is now 79,179 down and 20,000 up. SNR isn't great at 5 down and 6 up, but it seems to be ok so far. It's been up for 4 days and speed tests are showing a significant improvement.

I'm using a Draytek Vigor2860, so the links there don't work for me, but I can get some decent stats out the router.

Thanks for sorting!

Re: Banded / DLM Reset?

willcutforth — Fri, 03 May 2024 14:27:44 GMT

Awesome glad to hear it. Let me know if you need anything else.

Re: Banded / DLM Reset?

Townman — Fri, 03 May 2024 14:42:09 GMT

On the basis that the US & DS are at the product’s maximums, the SNRM is what it is and is of no material concern. Indeed they are ideal for best stability.

Re: Banded / DLM Reset?

bengutt — Thu, 16 May 2024 10:51:03 GMT

It's been pretty solid with no issues at all since the reset. Until now.

I'm getting a very poor connection with a high number of CRC errors. Connection to my work VPN is unusable, and using speedtest.net I'm getting upload speeds reported at 5mbs.

https://speedtest.btwholesale.com/ has just reported a download of 25.62 with an upload of 17.89. Images on the plusnet website have just downloaded like it's dialup.

Any Pointers on what I can try?

Re: Banded / DLM Reset?

Townman — Thu, 16 May 2024 10:53:18 GMT

Sight of the router stats / metrics would be helpful please.

Re: Banded / DLM Reset?

bengutt — Thu, 16 May 2024 10:54:27 GMT

Is this any good?

ATU-R Information

Type:

VDSL2

Hardware:

Annex A

Firmware:

05-07-06-0D-01-07

Power Mngt Mode:

DSL_G997_PMS_L0

Line State:

SHOWTIME

Running Mode:

17A

Vendor ID:

00000000 00000000

ATU-C Information

Vendor ID:

b5004946 544eb206 [IFTN]

Line Statistics

	Downstream		Upstream
Actual Rate	73999	Kbps	18999	Kbps
Attainable Rate	78768	Kbps	22530	Kbps
Path Mode	Fast		Fast
Interleave Depth	1		1
Actual PSD	4. 9	dB	5. 0	dB


	Near End		Far End
Trellis	ON		ON
Bitswap	ON		ON
ReTx	0		1
SNR Margin	7	dB	6	dB
Attenuation	14	dB	16	dB
CRC	285		159762
FECS	0	s	7962371	s
ES	103	s	76975	s
SES	73	s	975	s
LOSS	0	s	417	s
UAS	40	s	34111	s
HEC Errors	0		0
RS Corrections	0		0
LOS Failure	0		0
LOF Failure	4		0
LPR Failure	0		0
NCD Failure	0		0
LCD Failure	0		0
NFEC	255		32
RFEC	16		16
LYSMB	5134		16

Re: Banded / DLM Reset?

Townman — Thu, 16 May 2024 11:58:28 GMT

Thank you - really useful stats / metrics.

Looks like there are a lot of US errors. There's no harm in raising a fault report.