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Author Topic: High Errors?  (Read 4615 times)

Alucidnation

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  • Posts: 58
High Errors?
« on: March 14, 2019, 08:10:38 PM »

Hi Guys, as some may be aware, i have been and am having issues with various speed issues, and had the usual OR bull that everything is fine.

Anyway, I am currently running a ZyXel vmg1312 B10A on my ECI cab and it is picking up quite a few errors.

Could one of you take a look and give me your thoughts?

Is the amount of ES & CRC errors due to the lack of being corrected by FEC?

Thanks


Last Retrain Reason:    8000
Last initialization procedure status:   0
Max:    Upstream rate = 15436 Kbps, Downstream rate = 59685 Kbps
Bearer: 0, Upstream rate = 15348 Kbps, Downstream rate = 59673 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):        6.1             6.1
Attn(dB):        18.6            0.0
Pwr(dBm):        6.9             6.8

                        VDSL2 framing
                        Bearer 0
MSGc:           18              17
B:              239             238
M:              1               1
T:              64              64
R:              0               16
S:              0.1280          0.4956
L:              15000           4116
D:              1               1
I:              240             255
N:              240             255

                        Counters
                        Bearer 0
OHF:            16201847                2085824
OHFErr:         110             0
RS:             0               2581468
RSCorr:         0               3
RSUnCorr:       0               0

                        Bearer 0
HEC:            176             0
OCD:            0               0
LCD:            0               0
Total Cells:    3822638706              0
Data Cells:     204713310               0
Drop Cells:     0
Bit Errors:     0               0

ES:             294             0
SES:            47              0
UAS:            1836            1792
AS:             33317

                        Bearer 0
INP:            0.00            0.00
INPRein:        0.00            0.00
delay:          0               0
PER:            2.05            7.96
OR:             93.38           23.11
AgR:            59766.53        15370.92

Bitswap:        282/284         107/107

Total time = 1 days 9 hours 38 min 42 sec
FEC:            0               11
CRC:            22441           0
ES:             294             0
SES:            47              0
UAS:            1836            1792
LOS:            1               0
LOF:            27              0
LOM:            26              0
Latest 15 minutes time = 8 min 42 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:            0               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 = 9 hours 38 min 42 sec
FEC:            0               3
CRC:            8108            0
ES:             75              0
SES:            18              0
UAS:            1394            1379
LOS:            1               0
LOF:            6               0
LOM:            0               0
Previous 1 day time = 24 hours 0 sec
FEC:            0               8
CRC:            14333           0
ES:             219             0
SES:            29              0
UAS:            442             413
LOS:            0               0
LOF:            21              0
LOM:            26              0
Since Link time = 9 hours 15 min 17 sec
FEC:            0               3
CRC:            110             0
ES:             57              0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
NTR: mipsCntAtNtr=0 ncoCntAtNtr=0
 >

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ejs

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  • Posts: 2078
Re: High Errors?
« Reply #1 on: March 14, 2019, 08:34:35 PM »

The daily limit for ES is 2880 for the Speed profile, and you've got about 10% of that, so I can't really see how anyone could say about 200 to 300 ES per day is high.

If the stats had a count of all the CRCs that were OK, I'm guessing the number of CRC errors wouldn't look in any way high in comparison.

Yes I am aware you've had numerous Openreach visits over the last couple of months. Fortunately I deleted the other things I was going to write before posting.
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Alucidnation

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  • Posts: 58
Re: High Errors?
« Reply #2 on: March 17, 2019, 09:39:04 PM »

Turns out that i might be connected to a faulty port in the cabinet.

Apparently, it should be outputting at 120Mb, but is only putting out 113Mb.

After various requests from my ISP for them to perform a Lift and shift, and them finding any excuse to not do t (plus tell me they had done it, which were blatant lies) it turns out the cabinet is full, so there are no spare ports.

Why they couldn't just say that to start with, god knows.

About 3 meters away, an additional cabinet was installed a year or so ago, so i might get moved to that one instead.
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j0hn

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Re: High Errors?
« Reply #3 on: March 18, 2019, 12:23:00 AM »

Apparently, it should be outputting at 120Mb, but is only putting out 113Mb.

No idea who told you that but they are talking nonsense

Engineers test the ports over tie cables, which are effected by crosstalk.

Every port tested will giving a different reading/attainable and the difference between 113 and 120 does not point to a faulty port.
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Talktalk FTTP 550/75 - Speedtest - BQM

Alucidnation

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  • Posts: 58
Re: High Errors?
« Reply #4 on: March 18, 2019, 06:38:50 AM »

No idea who told you that....

Another bloody Openreach engineer!
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michty_me

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Re: High Errors?
« Reply #5 on: March 18, 2019, 06:57:55 AM »

So what makes you think there is an issue?
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Alucidnation

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  • Posts: 58
Re: High Errors?
« Reply #6 on: March 18, 2019, 07:06:16 AM »

Random disconnections, speed drops etc.

Openreach have admitted there is a problem.

One guy came to do a lift and shift, but didn’t as he had apparently sorted the problem with their DCoE.

Had sync back at nearly 70 with no errors at all and was running fine.

Got up the next morning and I had a resync, back down to high 40’s.
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michty_me

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Re: High Errors?
« Reply #7 on: March 18, 2019, 08:46:01 AM »

Now that is odd!
Not too sure what to suggest as there doesn't appear to be anything glaringly obvious.
When you sync at a higher speed again, can you get some stats from that?
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Alucidnation

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  • Posts: 58
Re: High Errors?
« Reply #8 on: March 18, 2019, 08:54:50 AM »

Now that is odd!
Not too sure what to suggest as there doesn't appear to be anything glaringly obvious.
When you sync at a higher speed again, can you get some stats from that?

I'll try but they haven't managed to get anywhere near that speed since.

Having said that, since then, all they have done is frantically dig up various joints and repair them, with no real improvement and not bothered to go back to the cabinet and do what the 'successful' engineer did.



I mentioned to the last engineer, that there was a chamber at the corner of our road, that hasn't had the cover off for years, but he didn't bother even lifting it to check to see what the condition of it was internally.

It may be empty but still.


I must admit, when i thought we were all sorted, i didn't bother getting any stats as i wrongly assumed that was the end of it and was all sorted!
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michty_me

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Re: High Errors?
« Reply #9 on: March 18, 2019, 09:36:06 AM »

I think that would be the way forward so that we have something to compare to.
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ejs

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Re: High Errors?
« Reply #10 on: March 18, 2019, 06:24:05 PM »

Random disconnections, speed drops etc.

How often do the random disconnections occur? How many typically per day? How many typically per week?
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Alucidnation

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  • Posts: 58
Re: High Errors?
« Reply #11 on: March 22, 2019, 01:43:32 PM »

Disconnections are normally every couple of days or so, mostly overnight.

Even the engineers have suggested that as everything else had apparently been sorted (line erros, HR joints), a lift and shift was the last thing to do to eliminate that.

And despite it being on their job notes to perform the task, each time it has not done it.
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johnson

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Re: High Errors?
« Reply #12 on: March 22, 2019, 01:50:03 PM »

Are you monitoring the line? Graphs of SNRM CRCs etc surrounding these disconnects might provide some insight.
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ejs

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Re: High Errors?
« Reply #13 on: March 22, 2019, 04:15:46 PM »

Is that only the one disconnection every couple of days? If so I wouldn't have thought that would be considered a fault.
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Alucidnation

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  • Posts: 58
Re: High Errors?
« Reply #14 on: March 23, 2019, 06:39:26 AM »

No i agree, but then things like this happen, like this morning..



https://thumbsnap.com/hokjeVoH

https://thumbsnap.com/tUtPFtHG?src=tsr

https://thumbsnap.com/7lAzKKCg?src=tsr

https://thumbsnap.com/9X4bjDet?src=tsr




Average error rates by day

23 Mar 2019
CRC errors per hour: 8.26 Down, 0 Up
FEC errors per hour: 0 Down, 0.15 Up
HEC errors per hour: 1.62 Down, 0 Up
ES per hour: 5.16 Down, 0 Up
SES per hour: 0 Down, 0 Up

22 Mar 2019
CRC errors per hour: 29.9 Down, 0 Up
FEC errors per hour: 0 Down, 0.29 Up
HEC errors per hour: 16.0 Down, 0 Up
ES per hour: 7.83 Down, 0 Up
SES per hour: 0 Down, 0 Up

21 Mar 2019
CRC errors per hour: 12.4 Down, 0 Up
FEC errors per hour: 0 Down, 0.11 Up
HEC errors per hour: 14.6 Down, 0 Up
ES per hour: 8.91 Down, 0 Up
SES per hour: 0 Down, 0 Up



VDSL Counters

           Downstream        Upstream
Since Link time = 4 min 55 sec
FEC:      1      0
CRC:      0      0
ES:      0      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 15 minutes time = 10 min 16 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:      0      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 = 19 hours 40 min 16 sec
FEC:      1      0
CRC:      0      0
ES:      145      0
SES:      10      0
UAS:      38      28
LOS:      1      0
LOF:      7      0
LOM:      0      0
Previous 1 day time = 24 hours 0 sec
FEC:      0      0
CRC:      0      0
ES:      203      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Total time = 1 days 19 hours 40 min 16 sec
FEC:      1      0
CRC:      0      0
ES:      672      1
SES:      10      0
UAS:      67      57
LOS:      1      0
LOF:      7      0
LOM:      0      0
====================================================================================

This is the third time it's dropped this low since problems began.

After several visits, joints and faults have (apparently) been cleared so the line is clean.

Which, surely leads to a faulty port? The last couple of times it's happened, it's only been like this for 24 hours, and then resyncs back.

Even the stats don't warrant DLM action in my non expert opinion.

                 
« Last Edit: March 23, 2019, 07:02:14 AM by Alucidnation »
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