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Very slow speed after initial 15 days. DLM Reset?

Lectos
Hooked
Posts: 7
Registered: ‎08-05-2019

Very slow speed after initial 15 days. DLM Reset?

Hi,

Just recently I signed for the plusnet broadband service, it was activated on April 23. I started getting a good service and speed during the first few days. However after the 15 first days my speed has been decreasing constantly day by day (from ~3mb/s to ~2mb/s to now ~1mb/s. My guess is that the line is getting a reduced speed by DLM. Part of this might have been my initial setup. The first 3-4 days I had the provided Plusnet Hub Zero connected to a phone line extension (i.e. not master socket), and noticed frequent drops when I had a big upload. I figured I could replace the router with something with better QoS/SQM so I got from eBay a BT Home Hub 5 (BTHH5) with OpenWRT. Upon looking at the logs of the BTHH5 I saw there were frequent DSL drops at night (between 2am and 8am), sometimes averaging a drop per hour (sample router log with lots of drops through the night attached). Router configuration:

Protocol: PPPoA 
PPPoA Encapsulation: VC-Mux 
VPI/VCI: 0/38 
Annex: A G992.5           previously I had it as (A + L + M(all) still with drops) 
Tone: A (A43C + J43 + A43) 

Yesterday I tried some things on the BTHH5 by recommendation from the people at the OpenWRT forums. Here are the stats after powering off the router for 15 minutes and having then the router running for 2hrs running from an extension socket.

 

ATU-C Vendor ID:                          Texas Instruments 5.16
ATU-C System Vendor ID:                   00,00,30,30,30,30,00,00
Chipset:                                  Lantiq-VRX200
Firmware Version:                         5.8.0.11.1.1
API Version:                              4.17.18.6
XTSE Capabilities:                        0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0
Annex:                                    A
Line Mode:                                G.992.5 (ADSL2+)
Profile:
Line State:                               UP [0x801: showtime_tc_sync]
Forward Error Correction Seconds (FECS):  Near: 10541 / Far: 193833
Errored seconds (ES):                     Near: 3 / Far: 1645250
Severely Errored Seconds (SES):           Near: 1 / Far: 7488
Loss of Signal Seconds (LOSS):            Near: 1 / Far: 3203
Unavailable Seconds (UAS):                Near: 41 / Far: 41
Header Error Code Errors (HEC):           Near: 51 / Far: 2968271
Non Pre-emtive CRC errors (CRC_P):        Near: 0 / Far: 0
Pre-emtive CRC errors (CRCP_P):           Near: 0 / Far: 0
Power Management Mode:                    L0 - Synchronized
Latency [Interleave Delay]:               7.25 ms [Interleave]   2.50 ms [Interleave]
Data Rate:                                Down: 2.271 Mb/s / Up: 1.022 Mb/s
Line Attenuation (LATN):                  Down: 30.7 dB / Up: 14.6 dB
Signal Attenuation (SATN):                Down: 28.3 dB / Up: 14.6 dB
Noise Margin (SNR):                       Down: 22.0 dB / Up: 6.0 dB
Aggregate Transmit Power (ACTATP):        Down: 18.2 dB / Up: 12.8 dB
Max. Attainable Data Rate (ATTNDR):       Down: 9.248 Mb/s / Up: 19.997 Mb/s
Line Uptime Seconds:                      7220
Line Uptime:                              2h 0m 20s

Because of the high FECS I plugged the BTHH5 router to the test socket and repeated the above. That gave me way lower FECS and a bit lower HEC.

 

 

Tue May  7 17:41:15 BST 2019
ATU-C Vendor ID:                          Texas Instruments 5.16
ATU-C System Vendor ID:                   00,00,30,30,30,30,00,00
Chipset:                                  Lantiq-VRX200
Firmware Version:                         5.8.0.11.1.1
API Version:                              4.17.18.6
XTSE Capabilities:                        0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0
Annex:                                    A
Line Mode:                                G.992.5 (ADSL2+)
Profile:
Line State:                               UP [0x801: showtime_tc_sync]
Forward Error Correction Seconds (FECS):  Near: 36 / Far: 193867
Errored seconds (ES):                     Near: 1 / Far: 1645257
Severely Errored Seconds (SES):           Near: 0 / Far: 7495
Loss of Signal Seconds (LOSS):            Near: 0 / Far: 3210
Unavailable Seconds (UAS):                Near: 41 / Far: 41
Header Error Code Errors (HEC):           Near: 0 / Far: 2968280
Non Pre-emtive CRC errors (CRC_P):        Near: 0 / Far: 0
Pre-emtive CRC errors (CRCP_P):           Near: 0 / Far: 0
Power Management Mode:                    L0 - Synchronized
Latency [Interleave Delay]:               7.25 ms [Interleave]   2.0 ms [Interleave]
Data Rate:                                Down: 2.271 Mb/s / Up: 1.008 Mb/s
Line Attenuation (LATN):                  Down: 30.3 dB / Up: 14.6 dB
Signal Attenuation (SATN):                Down: 27.9 dB / Up: 14.6 dB
Noise Margin (SNR):                       Down: 27.1 dB / Up: 6.3 dB
Aggregate Transmit Power (ACTATP):        Down: 18.3 dB / Up: 12.8 dB
Max. Attainable Data Rate (ATTNDR):       Down: 9.708 Mb/s / Up: 20.252 Mb/s
Line Uptime Seconds:                      7161
Line Uptime:                              1h 59m 21s

I thought that this would get the router not dropping the DSL connection, however upon checking the log this morning I had 1 DSL drop at about 4am (sorry I dont have a log available because I didn't saved it before powering off the router and swapping it for the Plusnet Hub Zero). 

 

I don't know if this might be a problem with the BTHH5 router/modem or line. My guess is that the best course of action (obviously, unless something else is suggested here) would be to run the Plusnet Hub Zero directly from the test socket with a DLM reset and see if there are any further drops. In any case, here are the Plusnet Hub Zero stats.

1 - Product name:		Plusnet Router
2 - Serial number:		N7183061B003228 
3 - Firmware version:		7.275.11_F2704N_Plusnet
4 - Board version:		F@ST2704N
5 - Mode			ADSL
6 - Uptime:			0 days 01:52:01
7 - Data rate:			910/1151
8 - Maximum data rate:		1108/17444
9 - Noise margin:		6.5/31.6
10 - Line attenuation:		15.3/28.0
12 - Data sent/received:	12.7M/160.8M
20 - Broadband username:	**********@plusdsl.net
21 - Wi-Fi network/SSID:	PLUSNET-RGMKQX
22 - Wi-Fi connections:		Enable(802.11 b/g/n(up to 144 Mb/s))20 MHz WPS disabled
23 - Wi-Fi security:		WPA2
24 - Wi-Fi channel:		11
25 - Firewall:			Default
26 - MAC Address:		d0:6e:de:07:d7:d5
27 - Software variant		Version 1.0
28 - Boot loader:		7.275.11

IP profile: 

Download Test:
Download speed achieved during the test was - 1.02 Mbps
For your connection, the acceptable range of speeds is 0.4 Mbps-1 Mbps.
IP Profile for your line is - 1.01 Mbps

Upload Test:
Upload speed achieved during the test was - 0Mbps
Additional Information:
Upstream Rate IP profile on your line is - 0.83 Mbps

Any help would be greatly appreciated.

Thanks!

 

 

 

15 REPLIES 15
adamwalker
Plusnet Help Team
Plusnet Help Team
Posts: 15,184
Thanks: 462
Fixes: 126
Registered: ‎27-04-2007

Re: Very slow speed after initial 15 days. DLM Reset?

Hi there, I've just had a look into this and tests don't show an obvious fault or cause for the issue but there is evidently a problem as the connection is dropping pretty frequently:

 

 

The best thing to do next would be to follow the steps here: https://www.plus.net/help/broadband/connection-troubleshooting/ then report a fault at http://faults.plus.net

 

Let me know here when you have and I'll get that raised with our suppliers for you.

If this post resolved your issue please click the 'This fixed my problem' button
 Adam Walker
 Plusnet Help Team
Lectos
Hooked
Posts: 7
Registered: ‎08-05-2019

Re: Very slow speed after initial 15 days. DLM Reset?

Hi Adam,

I have already followed the steps and reported the fault.

Just to add up, since the time of my first post I had two drops in connection (one just when I was about to post this) with the Plusnet Hub Zero connected to the test socket.

adamwalker
Plusnet Help Team
Plusnet Help Team
Posts: 15,184
Thanks: 462
Fixes: 126
Registered: ‎27-04-2007

Re: Very slow speed after initial 15 days. DLM Reset?

Cheers, I've just updated the fault ticket for you: https://www.plus.net/wizard/?p=view_question&id=189964498

If this post resolved your issue please click the 'This fixed my problem' button
 Adam Walker
 Plusnet Help Team
Lectos
Hooked
Posts: 7
Registered: ‎08-05-2019

Re: Very slow speed after initial 15 days. DLM Reset?

Hi Adam,

I replied to the fault ticket with the following,

Just two questions before proceeding as I am a bit concerned by the £65 possible charge. As I stated in the community forum post, I have been using a BT Home Hub 5a modem/router with OpenWRT firmware installed which might have been the reason for the dropping in connection. However I have, since this morning, swapped the router for the provided Plusnet Hub Zero and connected it to the test socket. Since then, and since my post in the forum, two drops occurred. 

My first question is: This last two drops that occurred with the Plusnet Hub Zero, could they have been related to you pulling data or looking at my connection? 

If that was the case, and to rule out that there might be something wrong with my equipment/internal wiring, could we instead do a DLM reset or at least manually putting me on a higher profile, and continue monitoring the connection? And just then, if more drops occur, have an engineer visit arranged.

Cheers

MatthewWheeler
Plusnet Help Team
Plusnet Help Team
Posts: 8,128
Thanks: 991
Fixes: 401
Registered: ‎01-01-2012

Re: Very slow speed after initial 15 days. DLM Reset?

Thanks for getting back to us @Lectos.

With regards to the points you've raised

 

My first question is: This last two drops that occurred with the Plusnet Hub Zero, could they have been related to you pulling data or looking at my connection?

The majority of the tests we do are intrusive so they will cause your connection to drop. I've checked your line and I can see we've done two intrusive tests on your line today before the one I've just done which will also have caused a drop.

If that was the case, and to rule out that there might be something wrong with my equipment/internal wiring, could we instead do a DLM reset or at least manually putting me on a higher profile, and continue monitoring the connection? And just then, if more drops occur, have an engineer visit arranged.

I'm more than happy to put through a DLM reset through for you but if the line is dropping whilst the speeds are currently banded then it's likely DLM will reapply the banding and we'll be back to square one again.

If you still want me to reset the line then respond to this post and I'll get that arranged for you

If this post resolved your issue please click the 'This fixed my problem' button
 Matthew Wheeler
 Plusnet Help Team
Lectos
Hooked
Posts: 7
Registered: ‎08-05-2019

Re: Very slow speed after initial 15 days. DLM Reset?

Hi Matt,
Thanks for your quick reply. I understand this, I think I would prefer a DLM reset rather than having the engineer come and all ending up on me using a faulty router/internal wiring through the initial days. So please go ahead with the DLM reset. If the line continues to drop with the Hub Zero router I'll be happy to have an engineer over.

Cheers
MatthewWheeler
Plusnet Help Team
Plusnet Help Team
Posts: 8,128
Thanks: 991
Fixes: 401
Registered: ‎01-01-2012

Re: Very slow speed after initial 15 days. DLM Reset?

Thanks for getting back to us @Lectos.

I've requested that your line be reset and this should go through shortly

Let us know how you get on

If this post resolved your issue please click the 'This fixed my problem' button
 Matthew Wheeler
 Plusnet Help Team
Townman
Superuser
Superuser
Posts: 16,900
Thanks: 6,995
Fixes: 67
Registered: ‎22-08-2007

Re: Very slow speed after initial 15 days. DLM Reset?

Hi @Lectos 

A warm welcome to the forum - thank you for the excellent set of diagnostics and descriptions of what you have done.  Plugging into the master socket test port eliminates your internal wiring (assuming the NTE has been wired correctly) so that ought to minimise the risk of the £65 NFF of fault found in end user equipment charge.

Setting aside the fact that your internal wiring is doing you no favours, the DS SNRM is very high - the cause of this needs to be identified.  If there is not line fault, you might be looking at a REIN issue which will take a lot of effort to profile.  Detailed monitoring of the router stats can be a helpful aid in understanding what is happening.  The HH5 does lend itself to such monitoring using Routerstats - see http://www.vwlowen.co.uk/internet/files.htm

Lectos
Hooked
Posts: 7
Registered: ‎08-05-2019

Re: Very slow speed after initial 15 days. DLM Reset?

@MatthewWheeler I think this has gone through, thanks. The reset is for 10 days? or is it for 15? And should I expect drops caused by the DLM through this days?

Router info looks like this:

1 - Product name:	Plusnet Router
2 - Serial number:	N7183061B003228 
3 - Firmware version:	7.275.11_F2704N_Plusnet
4 - Board version:	F@ST2704N
5 - Mode	ADSL
6 - Uptime:	0 days 02:22:45
7 - Data rate:	910/16322
8 - Maximum data rate:	1108/17788
9 - Noise margin:	5.7/6.1
10 - Line attenuation:	15.3/28.0
12 - Data sent/received:	38.0M/231.7M
20 - Broadband username:	*******@plusdsl.net
21 - Wi-Fi network/SSID:	PLUSNET-RGMKQX
22 - Wi-Fi connections:	Enable(802.11 b/g/n(up to 144 Mb/s))20 MHz WPS disabled
23 - Wi-Fi security:	WPA2
24 - Wi-Fi channel:	11
25 - Firewall:	Default
26 - MAC Address:	d0:6e:de:07:d7:d5
27 - Software variant	Version 1.0
28 - Boot loader:	7.275.11

@Townman Thanks a lot for the welcome. I am a bit reluctant to use the BTHH5 at the moment, would just like to rule out that it is the cause of the problems. However, if after the DLM reset this continues, and if the engineer doesn't find anything, I will look into this. Thanks for the suggestion.

 

RandallFlagg
Plusnet Alumni (retired)
Plusnet Alumni (retired)
Posts: 1,915
Fixes: 75
Registered: ‎11-01-2018

Re: Very slow speed after initial 15 days. DLM Reset?

 

Hi @Lectos

 

The DLM reset doesn't have a timescale - it will reset it indefinitely until something on the line causes it to move - for example drops, noise etc.

 

You shouldn't expect drops because of DLM, but any drops that do occur may result in the DLM affecting your speed as Matt has covered in his earlier post.

 

Let us know how you get on.

 

Best wishes

 

Dave

Lectos
Hooked
Posts: 7
Registered: ‎08-05-2019

Re: Very slow speed after initial 15 days. DLM Reset?

Hello,

Unfortunately after a couple of months of having no additional problems, I've had another DLM profile decrease. I sincerelly don't know what happened. I was out of the flat for about 12 days and nobody else was here (so nobody using the internet or  electric devices). Upon returning I noticed the internet was a bit slow, so went to check the modem statistics (Plusnet hub zero). Line was up for about 10.5 days but ES errors where high:

 

Line Rate - Upstream (Kbps):	966
Line Rate - Downstream (Kbps):	17815
ShowtimeStart (seconds)	904561
LAN IPv4 Address:	192.168.1.254
WAN IPv4 Address:	some.numbers.go.here
Default Gateway:	and.also.go.here
Primary DNS Server:	192.168.1.3
Secondary DNS Server:	192.168.1.3
LAN IPv6 ULA Address:	 
Default IPv6 Gateway:	 
Primary IPv6 DNS Server:	 
Secondary IPv6 DNS Server:	 
Date/Time:	Tue Jul 9 00:56:51 2019 

 

Mode:	ADSL_2plus	 	 
Traffic Type:	ATM	 	 
Status:	Up	 	 
Link Power State:	L0	 	 
 
 	Downstream	Upstream	 	 
Line Coding(Trellis):	On	Off	 	 
SNR Margin (1 dB):	3.1	5.2	 	 
Attenuation (1 dB):	28.0	15.4	 	 
Output Power (1 dBm):	20.9	12.2	 	 
Attainable Rate (Kbps):	19448	1216	 	 
 
 	Path 0	 	Path 1	 
 	Downstream	Upstream	Downstream	Upstream
Rate (Kbps):	17815	966	0	0
 
MSGc (# of bytes in overhead channel message):	52	29	0	0
B (# of bytes in Mux Data Frame):	154	34	0	0
M (# of Mux Data Frames in FEC Data Frame):	1	4	0	0
T (Mux Data Frames over sync bytes):	4	2	0	0
R (# of check bytes in FEC Data Frame):	14	16	0	0
S (ratio of FEC over PMD Data Frame length):	0.2779	4.5714	0.0	0.0
L (# of bits in PMD Data Frame):	4864	273	0	0
D (interleaver depth):	96	2	0	0
Delay (msec):	7	2	0.0	0.0
INP (DMT symbol):	1.00	0.00	0.0	0.0
 
Super Frames:	66622605	52853534	0	0
Super Frame Errors:	58065	41569	0	0
RS Words:	118487658	1229267	0	0
RS Correctable Errors:	89805178	260769	0	0
RS Uncorrectable Errors:	1979436	0	0	0
 
HEC Errors:	1393074	35405	0	0
OCD Errors:	1577	0	0	0
LCD Errors:	1577	0	0	0
Total Cells:	3604945493	2058668004	0	0
Data Cells:	5941260	4655973	0	0
Bit Errors:	0	3438022	0	0
 
Total ES:	24771	38955	 	 
Total SES:	372	23	 	 
Total UAS:	73	53	 	 

So I went ahead and rebooted the Plusnet hub zero. Since then the line has been up for about 1.5 days and is still with a considerable amount of ES errors.

 

Line Rate - Upstream (Kbps):	574
Line Rate - Downstream (Kbps):	6422
ShowtimeStart (seconds)	127611
LAN IPv4 Address:	192.168.1.254
WAN IPv4 Address:	some.numbers.go.here
Default Gateway:	and.also.go.here
Primary DNS Server:	192.168.1.3
Secondary DNS Server:	192.168.1.3
LAN IPv6 ULA Address:	 
Default IPv6 Gateway:	 
Primary IPv6 DNS Server:	 
Secondary IPv6 DNS Server:	 
Date/Time:	Thu Jul 11 13:26:30 2019 
Mode:	ADSL_2plus	 	 
Traffic Type:	ATM	 	 
Status:	Up	 	 
Link Power State:	L0	 	 
 
 	Downstream	Upstream	 	 
Line Coding(Trellis):	On	Off	 	 
SNR Margin (1 dB):	22.7	11.3	 	 
Attenuation (1 dB):	30.5	16.5	 	 
Output Power (1 dBm):	21.1	12.2	 	 
Attainable Rate (Kbps):	19180	800	 	 
 
 	Path 0	 	Path 1	 
 	Downstream	Upstream	Downstream	Upstream
Rate (Kbps):	6422	574	0	0
 
MSGc (# of bytes in overhead channel message):	59	29	0	0
B (# of bytes in Mux Data Frame):	200	20	0	0
M (# of Mux Data Frames in FEC Data Frame):	1	4	0	0
T (Mux Data Frames over sync bytes):	1	2	0	0
R (# of check bytes in FEC Data Frame):	14	12	0	0
S (ratio of FEC over PMD Data Frame length):	0.9965	4.5714	0.0	0.0
L (# of bits in PMD Data Frame):	1726	168	0	0
D (interleaver depth):	32	2	0	0
Delay (msec):	8	2	0.0	0.0
INP (DMT symbol):	1.00	0.50	0.0	0.0
 
Super Frames:	10949228	8803121	0	0
Super Frame Errors:	25929	7878	0	0
RS Words:	511890541	36008	0	0
RS Correctable Errors:	26710	15197	0	0
RS Uncorrectable Errors:	8258	0	0	0
 
HEC Errors:	488505	22825	0	0
OCD Errors:	8	0	0	0
LCD Errors:	8	0	0	0
Total Cells:	1931653768	172612589	0	0
Data Cells:	181873831	14819994	0	0
Bit Errors:	0	197431	0	0
 
Total ES:	6180	2888	 	 
Total SES:	342	91	 	 
Total UAS:	572	311	 	 

IP profile for the line:

 
20190711 IPprofile.PNG

As an additional note, there is a construction going on just infront of the flat, as well as some gas line works down the road. Don't know if this is relevant or could have some impact due to REIN issue caused by the construction/roadwork.

Any help would be greatly appreciated,

Thanks!

 

 

 

EmilyD
Plusnet Help Team
Plusnet Help Team
Posts: 1,959
Thanks: 339
Fixes: 110
Registered: ‎26-03-2018

Re: Very slow speed after initial 15 days. DLM Reset?

Hi @Lectos,

 

I'm sorry that you're experiencing problems with your connection again and for any inconvenience that this is causing you.

 

I've tested your line and can see that it's currently syncing at 6.4mbps, which is below the line's estimates of 16 - 19.5mbps. The SNR margin is high but so are the number of errors on the line, so an DLM reset wouldn't resolve the problem and is likely to result in the connection becoming intermittent.

 

xDSL Status Check
Circuit ID: CBUKXXXXXXXX Service ID: BBEUXXXXXXXX
Telephone NO.: NA Test Executed On: 11-07-2019 15:43:59
xDSL Status Test Summary
Sync Status: Circuit In Sync
General Information
NTE Status:   NTE Power Status: Unknown Bypass Status:  
 
  Upstream DSL Link Information Downstream DSL Link Information
Loop Loss: 16.5 30.5
SNR Margin: 11.3 22.6
Errored Seconds: 1 0
HEC Errors: 0  
Cell Count: 67425 442822
Speed: 572 6420
 
Maximum Stable Rate (KBPS): 576 Fault Threshold Rate (KBPS): 460
Mean Time Between Retrains (Seconds): 21563 Mean Time Between Errors Upstream (Seconds): 26
Indicative Line Quality: A Mean Time Between Errors Downstream (Seconds): 15
Custom Thresholds
MTBR_RED: MTBE_RED:
MTBR_GREEN: MTBE_GREEN:

 

http://visualradius.plus.net/visualradius/generate.php

The test hasn't picked up the cause of the problem from here, but it could well be that the construction work near your property has led to REIN. We'll need to investigate this further for you. Please can you run through the troubleshooting guides including connecting the router to the test socket, if you've not done so already. If the troubleshooting checks don't resolve the issue please report it here and let us know when you've completed it.

If this post resolved your issue please click the 'This fixed my problem' button
 Emily D
 Plusnet Help Team
Lectos
Hooked
Posts: 7
Registered: ‎08-05-2019

Re: Very slow speed after initial 15 days. DLM Reset?

Hi @EmilyD 

Thanks for your reply and help. I will go through the troubleshooter later today, need to get some work done before. Will report back once that is done.

A quick question, did you perform a DLM reset just now? After your test the line resynched at 17474 Kbps with a SNRM of 3.2 downstream. Also out of curiosity, why is it synching at ~3 dB SNRM instead of the usual 6 dB?

	Downstream	Upstream	 	 
Line Coding(Trellis):	On	Off	 	 
SNR Margin (1 dB):	3.2	5.0	 	 
Attenuation (1 dB):	28.5	15.5	 	 
Output Power (1 dBm):	20.8	12.2	 	 
Attainable Rate (Kbps):	19236	1196	 	 
 
 	Path 0	 	Path 1	 
 	Downstream	Upstream	Downstream	Upstream
Rate (Kbps):	17474	976	0	0

IP profile

20190711-2 IPprofile.PNG

Kind regards

MasterOfReality
Plusnet Help Team
Plusnet Help Team
Posts: 1,639
Thanks: 275
Fixes: 57
Registered: ‎26-03-2018

Re: Very slow speed after initial 15 days. DLM Reset?

Hi @Lectos 

 

I don't think Emily actually performed any DLM reset...but it's good to know that the line is now that the line is no syncing within estimates! 

Also out of curiosity, why is it synching at ~3 dB SNRM instead of the usual 6 dB?

Hard to say really, this can happen for a number of different reasons and trying to find this out after the fact is pretty much impossible. 

 

Sorry that this is not a very helpful reply, if I could give you the answers you were looking for then i would! 

 

Kind Regards, 

MoR

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 MoR
 Plusnet Help Team