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Standard User arobertson545
(regular) Thu 21-May-15 23:34:45
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Got FTTC today, stats aren't looking too good?


[link to this post]
 
Hi all, we just got fibre today. Here are the stats from the HG612 and they aren't looking too good are they?

Text
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xdslcmd: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 0
Last initialization procedure status:   0Max:    Upstream rate = 10953 Kbps, Downstream rate = 52512 Kbps
Bearer: 0, Upstream rate = 10953 Kbps, Downstream rate = 52640 Kbps 
Link Power State:       L0Mode:                   VDSL2 Annex B
VDSL2 Profile:          Profile 17aTPS-TC:                 PTM Mode(0x0)
Trellis:                U:ON /D:ONLine Status:            No Defect
Training Status:        Showtime                Down            Up
SNR (dB):        6.1             6.6Attn(dB):        23.1            0.0
Pwr(dBm):        12.0            5.1                        VDSL2 framing
                        Bearer 0MSGc:           18              26
B:              239             241M:              1               1
T:              64              56R:              0               12
S:              0.1451          0.7026L:              13232           2892
D:              1               1I:              240             127
N:              240             254                        Counters
                        Bearer 0OHF:            6921056         1639418
OHFErr:         32474           25RS:             0               1590410
RSCorr:         0               262RSUnCorr:       0               0
                         Bearer 0
HEC:            15002           0OCD:            515             0
LCD:            515             0Total Cells:    1631912128              0
Data Cells:     139082522               0Drop Cells:     0
Bit Errors:     0               0 
ES:             2331            24SES:            75              0
UAS:            25              25AS:             16125
                         Bearer 0
INP:            0.00            0.00INPRein:        0.00            0.00
delay:          0               0PER:            2.33            9.87
OR:             82.37           25.92AgR:            52722.05        10978.59
 Bitswap:        11347/11353             304/309

Edited by arobertson545 (Thu 21-May-15 23:50:57)

Standard User connormill
(regular) Thu 21-May-15 23:41:20
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Re: Got FTTC today, stats aren't looking too good?


[re: arobertson545] [link to this post]
 
Looks like 52mbps down and 10mbps up to me

What does speedtest.net give you? and what were you estimated when you ordered?


Also, everything from line 19 down is generally not required when diagnosing speeds / line faults. maybe best to not include it, just to keep the post length down?

80/20 FTTC with plusnet

Edited by connormill (Thu 21-May-15 23:46:28)

Standard User arobertson545
(regular) Thu 21-May-15 23:51:18
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Re: Got FTTC today, stats aren't looking too good?


[re: connormill] [link to this post]
 
I'm talking about the errors - there are masses?


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Standard User connormill
(regular) Thu 21-May-15 23:54:10
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Re: Got FTTC today, stats aren't looking too good?


[re: arobertson545] [link to this post]
 
In reply to a post by arobertson545:
I'm talking about the errors - there are masses?


Ahhh, got ya!

I'm not 100% sure on FTTC, but on ADSL I don't think the errors should be too much cause for concern unless the start to impact speed, cause resynces or cause DLM to interfere.

Do you have a BQM setup. that could be a handy way of seeing if packets are being dropped because of the errors

80/20 FTTC with plusnet
Standard User RobertoS
(elder) Fri 22-May-15 00:45:54
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Re: Got FTTC today, stats aren't looking too good?


[re: arobertson545] [link to this post]
 
The DLM doesn't make any adjustments until the end of the day after the day of connection. Unless there is something major going wrong.

So you will probably see it has stepped in by Saturday morning. The full stats you have given are necessary if it has, to enable informed comment from the experts.

Do you happen to know whether the cabinet is a Huawei or an ECI?

My broadband basic info/help site - www.robertos.me.uk. Domains, site and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync 60000/16961kbps @ 600m. - IPv4BQM IPv6BQM

Edited by RobertoS (Fri 22-May-15 00:46:15)

Standard User David_W
(fountain of knowledge) Fri 22-May-15 07:49:25
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Re: Got FTTC today, stats aren't looking too good?


[re: arobertson545] [link to this post]
 
At the moment, your downstream is operating with no Reed Solomon error correction (R is 0, indicating no redundancy) and no interleaving (D is 1). This would explain why you have nearly 39 minutes of downstream error seconds (ES of 2331) as the slightest disturbance in the downstream cannot be corrected. That said, I suspect the line is working reasonably well in practice.

As Bob says, DLM is slow to intervene on a new line.


I am not sure whether Openreach have ended their pause on rolling out G.INP profiles yet. If they have and you are on a Huawei cabinet, I expect that you'll get G.INP enabled within a few days. This enables some Reed Solomon in both directions and allows retransmission in the event of an error, meaning the higher layers in the network stack don't need to recover the situation.

If you're not on a Huawei cabinet or Openreach's pause on rolling out G.INP profiles is still in place, you may well see downstream Reed Solomon (R other than 0) and maybe a little interleaving (D greater than 1) within a few days.


There are others more expert than I in interpreting VDSL2 statistics and in the strategies employed by Openreach DLM.

Standard User arobertson545
(regular) Fri 22-May-15 10:49:11
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Re: Got FTTC today, stats aren't looking too good?


[re: David_W] [link to this post]
 
It's a Huawei cabinet for certain.

Speeds, etc. are fine and the the SNRM will drop a little bit at night, maybe down to 5.2 from a max of about 6.8 - that's normal I'm guessing?

I'm just worried about the number of severe error seconds and CRCs.

I'm surprised G.INP isn't enabled as the cabinet was only installed about a month ago?
Standard User RobertoS
(elder) Fri 22-May-15 13:05:57
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Re: Got FTTC today, stats aren't looking too good?


[re: arobertson545] [link to this post]
 
Which version of the HG612 unlocked firmware/software have you got? You need software V100R001C01B030SP08.

My broadband basic info/help site - www.robertos.me.uk. Domains, site and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync 60000/16961kbps @ 600m. - IPv4BQM IPv6BQM
Standard User David_W
(fountain of knowledge) Fri 22-May-15 13:15:13
Print Post

Re: Got FTTC today, stats aren't looking too good?


[re: arobertson545] [link to this post]
 
Openreach temporarily stopped putting people on G.INP profiles because of the additional latency experienced when the client device was not capable of bidirectional G.INP. A post today elsewhere on the forums implies that the Openreach trial of alternative G.INP profiles that mitigates this problem has been successful. That being the case, I suspect that the G.INP roll-out will restart shortly.

In other words, it may be a few weeks before you switch to G.INP, though I expect that switch to happen eventually. Make sure you have the B030SP08 firmware on your unlocked HG612, as earlier versions are not G.INP compatible.


Slight fluctuation in the SNR margin is normal, as on ADSL.

Standard User dave2150
(experienced) Fri 22-May-15 14:01:28
Print Post

Re: Got FTTC today, stats aren't looking too good?


[re: arobertson545] [link to this post]
 
In reply to a post by arobertson545:
Hi all, we just got fibre today. Here are the stats from the HG612 and they aren't looking too good are they?

Text
1
23
45
67
89
1011
1213
1415
1617
1819
2021
2223
2425
2627
2829
3031
3233
3435
3637
3839
4041
4243
4445
4647
4849
5051
5253
5455
5657
5859
6061
xdslcmd: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 0
Last initialization procedure status:   0Max:    Upstream rate = 10953 Kbps, Downstream rate = 52512 Kbps
Bearer: 0, Upstream rate = 10953 Kbps, Downstream rate = 52640 Kbps 
Link Power State:       L0Mode:                   VDSL2 Annex B
VDSL2 Profile:          Profile 17aTPS-TC:                 PTM Mode(0x0)
Trellis:                U:ON /D:ONLine Status:            No Defect
Training Status:        Showtime                Down            Up
SNR (dB):        6.1             6.6Attn(dB):        23.1            0.0
Pwr(dBm):        12.0            5.1                        VDSL2 framing
                        Bearer 0MSGc:           18              26
B:              239             241M:              1               1
T:              64              56R:              0               12
S:              0.1451          0.7026L:              13232           2892
D:              1               1I:              240             127
N:              240             254                        Counters
                        Bearer 0OHF:            6921056         1639418
OHFErr:         32474           25RS:             0               1590410
RSCorr:         0               262RSUnCorr:       0               0
                         Bearer 0
HEC:            15002           0OCD:            515             0
LCD:            515             0Total Cells:    1631912128              0
Data Cells:     139082522               0Drop Cells:     0
Bit Errors:     0               0 
ES:             2331            24SES:            75              0
UAS:            25              25AS:             16125
                         Bearer 0
INP:            0.00            0.00INPRein:        0.00            0.00
delay:          0               0PER:            2.33            9.87
OR:             82.37           25.92AgR:            52722.05        10978.59
 Bitswap:        11347/11353             304/309


Stats are fine, within a few days you'll be put onto interleaved and you'll probably loose 2-5mbit of sync, until the ES are reduced to a minimum.

Enjoy your new service smile

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