Very slow speed after initial 15 days. DLM Reset?
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Very slow speed after initial 15 days. DLM Reset?
08-05-2019 11:38 AM
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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!
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 12:22 PM
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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.
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 12:48 PM
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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.
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 1:00 PM
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Cheers, I've just updated the fault ticket for you: https://www.plus.net/wizard/?p=view_question&id=189964498
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 4:34 PM
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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
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 4:56 PM - edited 08-05-2019 4:57 PM
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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
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 5:07 PM
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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
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 5:20 PM
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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
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 5:28 PM
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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
In another browser tab, login into the Plusnet user portal BEFORE clicking the fault & ticket links
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
If this post helped, please click the Thumbs Up and if it fixed your issue, please click the This fixed my problem green button below.
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 7:49 PM
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@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.
Re: Very slow speed after initial 15 days. DLM Reset?
08-05-2019 8:36 PM
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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
Re: Very slow speed after initial 15 days. DLM Reset?
11-07-2019 1:36 PM
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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:
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!
Re: Very slow speed after initial 15 days. DLM Reset?
11-07-2019 3:56 PM - edited 11-07-2019 3:57 PM
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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: |
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.
Re: Very slow speed after initial 15 days. DLM Reset?
11-07-2019 4:09 PM
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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
Kind regards
Re: Very slow speed after initial 15 days. DLM Reset?
11-07-2019 5:00 PM
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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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