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Lots of errors in modem stats

beardedwonder
Dabbler
Posts: 17
Registered: ‎17-01-2015

Lots of errors in modem stats

Hi,
I've had quite a few problems with my broadband recently. I was put onto the 40/20 service for some reason, then the modem starting syncing at 10Mbps Down and 8Mbps Up. Plusnet decided this was a line fault and a few days later an Openreach engineer turned up but couldn't find anything wrong.
I seem to be getting lots of errors, here are the stats:
xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Max: Upstream rate = 15433 Kbps, Downstream rate = 81712 Kbps
Path: 0, Upstream rate = 11623 Kbps, Downstream rate = 64141 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.6 6.0
Attn(dB): 0.0 0.0
Pwr(dBm): 13.5 7.6
VDSL2 framing
Path 0
B: 41 21
M: 1 1
T: 64 64
R: 14 10
S: 0.0208 0.0602
L: 21504 4255
D: 1543 427
I: 56 32
N: 56 32
Counters
Path 0
OHF: 80185020 866076
OHFErr: 17988 81
RS: 3347306528 1880783
RSCorr: 56552106 157647
RSUnCorr: 2731110 0
Path 0
HEC: 501054 0
OCD: 9040 0
LCD: 9040 0
Total Cells: 346468629 0
Data Cells: 101347877 0
Drop Cells: 0
Bit Errors: 0 0
ES: 907 293
SES: 383 79
UAS: 617 617
AS: 107333
Path 0
INP: 4.00 4.00
PER: 1.33 7.70
delay: 8.00 6.00
OR: 120.00 33.24
Bitswap: 39309 12016
Total time = 1 days 1 hours 31 min 21 sec
FEC: 186095437 2675688
CRC: 187057 1616
ES: 907 293
SES: 383 79
UAS: 617 617
LOS: 77 0
LOF: 73 0
13 REPLIES
jafreer
Aspiring Pro
Posts: 844
Thanks: 54
Registered: ‎13-10-2012

Re: Lots of errors in modem stats

You have a high number of errors on the line and I think DLM has put a high level of interleaving on because of this (1543 on the downstream).
You don't have G.Inp enabled so you likely are either on an ECI cab, or a Huawei cab with an ECI modem.
Having said that, your attainable rates are very good, and your actual rates whilst good, are a bit below the attainable.
If you use a program like HG612 Modem Stats, or DSL Stats, and monitor the graph of corrected FECs, you can try and see if the noise is constant, or comes in bursts. You can then try and correlate it with electrical equipment in your house (If the noise comes in spikes, does it coincide with an electrical appliance, timeswitch, heating controller etc). If it is constant, try turning things off and see if it disappears.
If you use power line networking adapters, try switching those off first.
Best of luck.
beardedwonder
Dabbler
Posts: 17
Registered: ‎17-01-2015

Re: Lots of errors in modem stats

I have an unlocked HG612, no powerline adapters. I don't know the make of my cabinet. The noise doesn't seem to follow much of a pattern at all.
jafreer
Aspiring Pro
Posts: 844
Thanks: 54
Registered: ‎13-10-2012

Re: Lots of errors in modem stats

The noise does seem fairly constant.
I would try turning electrical equipment off and see if it makes a difference.
There are lots of instances where something as simple as a laptop power supply was causing horrendous noise.
The noise could be external, but I would think it is more likely to be internal (to your property). Turning off electrical items is a good exercise to work out what is causing the problem.
By way of comparison, my FEC error graph generally sits below 100, although there are very occasional spikes up in the thousands. I am currently working to find out what causes that.
Also check the overnight graph, as more equipment is switched off at that time.
Community Veteran
Posts: 1,841
Thanks: 103
Fixes: 6
Registered: ‎21-01-2013

Re: Lots of errors in modem stats

I don't see a problem with those stats, we all can't have perfect lines.
A sync speed of 64Mbps down and 11.6Mbps up -- better than most.
Uptime:  30 hours
ES/hour:  44.5 ( downstream)  -- not high enough to offend the DLM.
Interleaving depth: 1543 down  427 up -- on the high side but needed to correct errors.
delay:        8.00 down        6.00 up -- this will add >16ms of latency
FEC:        186095437 down      2675688 up -- corrected errors, be thankful they are corrected.
As previously said, your BT cabinet is not using the new impulse noise protection (G.INP). Once that gets rolled out to ECI cabinet thing's should be greatly improved (IMO), mainly the +16ms of latency should disappear along with the FEC corrected errors and the errored seconds.
If that was my connection stats I would be very positive about them and for the prospects.
beardedwonder
Dabbler
Posts: 17
Registered: ‎17-01-2015

Re: Lots of errors in modem stats

Quote from: npr
As previously said, your BT cabinet is not using the new impulse noise protection (G.INP). Once that gets rolled out to ECI cabinet thing's should be greatly improved (IMO), mainly the +16ms of latency should disappear along with the FEC corrected errors and the errored seconds.
If that was my connection stats I would be very positive about them and for the prospects.

Would impulse noise protection help when it looks like the background noise is constant on my graphs?
I seem to be experiencing one disconnection (PPP session) per day, which wasn't happening before this recent run of problems. I will try turning everything off in the house except the modem and router and then run the laptop off the battery to get the stats and see if that changes anything.
EDIT: Will I have to do upgrade the firmware on the unlocked HG612 when G.INP is implemented?
Community Veteran
Posts: 1,841
Thanks: 103
Fixes: 6
Registered: ‎21-01-2013

Re: Lots of errors in modem stats

G.INP is too new for us to be sure about the benefits for individual line issues but from the stats we're seeing posted on various forums I'm certainly hopeful it will greatly improve my broadband issues which are not unlike yours (only with much less speed  Undecided ). Just have to wait for BT to get their finger out with ECI cab's.
For me, the claim of constant background noise is reading too much into that FEC graph.
Are you sure you're getting dropped ppp without getting a vdsl resync?
Does the modems log show anything?
The Huawei modem HG612 running unlocked firmware V100R001C01B030SP08 is reported to be G.INP ready.
If you wish to reduce the interleaving depth and reduce some of the error you're so concerned about you can do that by sacrificing a bit of speed. The maximum sync speed (maxDataRate) can be configured via telnet on a unlocked HG612 modem -- reduced sync gives less errors.  Cool
beardedwonder
Dabbler
Posts: 17
Registered: ‎17-01-2015

Re: Lots of errors in modem stats

DSL uptime is currently 2 days 7 hours, my router has a new WAN IP and I've changed gateway. My modem is currently running software version: V100R001C01B028SP10
Community Veteran
Posts: 1,841
Thanks: 103
Fixes: 6
Registered: ‎21-01-2013

Re: Lots of errors in modem stats

I'm not sure if the HG612 reports the DSL uptime correctly, some modem / routers don't, they report uptime as dsl uptime -- not the same thing.
If you've got access to the modems GUI the log file will report any resyncs.
Don't know if that unlocked firmware is G.INP ready.
We've assumed you're on a ECI cab could it be it's the firmware preventing you getting G.INP.  Undecided
Software version    V100R001C01B030SP08
https://mega.co.nz/#F!LdJFDIJL!e_E1twsIg2kTet8mPjrb4w
Info about G.INP here:
http://forum.kitz.co.uk/index.php/topic,15283.msg284199.html#post_HG612
Bald_Eagle1
Grafter
Posts: 313
Registered: ‎24-06-2011

Re: Lots of errors in modem stats

Quote from: npr
Don't know if that unlocked firmware is G.INP ready.
We've assumed you're on a ECI cab could it be it's the firmware preventing you getting G.INP.  Undecided

No. It's not compatible.
If it hasn't been set to block remote updates, the firmware/software should be auto-updated if connected to a Huawei cabinet DSLAM.
However, it appears that further Huawei DSLAM updates to G.INP may have been temporarily suspended until the ECI DSLAM/modems issue has been resolved.

I am connected to an updated Huawei DSLAM.
Just as a test for an unrelated purpose, I reverted to version: V100R001C01B028SP10.
G.INP was immediately disabled, Interleaving was applied at a depth of almost 300, sync speed was reduced etc............................
Reinstalling V100R001C01B030SP08 immediately restored G.INP & the connection stats & sync speed etc. inmproved again.


beardedwonder
Dabbler
Posts: 17
Registered: ‎17-01-2015

Re: Lots of errors in modem stats

Well that's made a bit of a difference, fewer errors and decent gain in speed, especially upload, and the latency is much improved.
xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 15556 Kbps, Downstream rate = 80680 Kbps
Bearer: 0, Upstream rate = 14997 Kbps, Downstream rate = 73998 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 7.8 5.8
Attn(dB): 18.7 0.0
Pwr(dBm): 13.5 7.5
VDSL2 framing
Bearer 0
MSGc: -6 -6
B: 146 130
M: 1 1
T: 0 0
R: 8 16
S: 0.0630 0.2763
L: 19683 4256
D: 8 2
I: 155 147
N: 155 147
Q: 8 2
V: 4 0
RxQueue: 140 125
TxQueue: 35 25
G.INP Framing: 18 18
G.INP lookback: 31 25
RRC bits: 24 24
Bearer 1
MSGc: 154 58
B: 0 0
M: 2 2
T: 2 2
R: 16 16
S: 6.4000 16.0000
L: 40 16
D: 3 1
I: 32 32
N: 32 32
Q: 0 0
V: 0 0
RxQueue: 0 0
TxQueue: 0 0
G.INP Framing: 0 0
G.INP lookback: 0 0
RRC bits: 0 0
Counters
Bearer 0
OHF: 0 0
OHFErr: 0 0
RS: 592531848 2001840
RSCorr: 1321676 788
RSUnCorr: 0 0
Bearer 1
OHF: 4811081 635644
OHFErr: 0 1
RS: 48110194 2139924
RSCorr: 45 78
RSUnCorr: 0 0
Retransmit Counters
rtx_tx: 4588 349
rtx_c: 3823 351
rtx_uc: 0 0
G.INP Counters
LEFTRS: 2 5
minEFTR: 73985 14997
errFreeBits: 87240151 17820713
Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 2406962149 0
Data Cells: 90972894 0
Drop Cells: 0
Bit Errors: 0 0
Bearer 1
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 0 0
Data Cells: 0 0
Drop Cells: 0
Bit Errors: 0 0
ES: 0 0
SES: 0 0
UAS: 174 174
AS: 77279
Bearer 0
INP: 52.00 54.00
INPRein: 1.00 1.00
delay: 0 0
PER: 0.00 0.00
OR: 0.01 0.01
AgR: 74377.87 15112.01
Bearer 1
INP: 4.50 4.00
INPRein: 4.50 4.00
delay: 3 0
PER: 16.06 16.06
OR: 79.68 31.87
AgR: 79.68 31.87
Bitswap: 59150/59150 8565/8565
Total time = 21 hours 30 min 53 sec
FEC: 1321676 788
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 174 174
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 53 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 7 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 21 hours 30 min 53 sec
FEC: 1321676 788
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 174 174
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 21 hours 27 min 59 sec
FEC: 1321676 788
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Community Veteran
Posts: 1,841
Thanks: 103
Fixes: 6
Registered: ‎21-01-2013

Re: Lots of errors in modem stats

I assume you changed the firmware?
Glad you've got a improvement, what a difference G.INP makes  Wink
beardedwonder
Dabbler
Posts: 17
Registered: ‎17-01-2015

Re: Lots of errors in modem stats

Quote from: npr
I assume you changed the firmware?
Glad you've got a improvement, what a difference G.INP makes  Wink

Yes, for anyone that's interested I installed:
bcm96368MVWG_fs_kernel_HG612V100R001C01B030SP08_webgui
I wonder if having an incompatible firmware caused any extra problems, or do you think that all the benefit comes from G.INP?
Community Veteran
Posts: 1,841
Thanks: 103
Fixes: 6
Registered: ‎21-01-2013

Re: Lots of errors in modem stats

It may be G.INP caused some issues with firmware which is not compatible, but if you hadn't unlocked the modem there wouldn't have been a problem.
I'm sure there's a overall benefit though.