Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: hushcoden on January 16, 2019, 04:29:58 PM
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Hi folks,
Sky has upgraded my line from 40/10 to 80/20 (and without any surcharge), and after about 27 hours I can see it's not performing at the best (I know there is crosstalk, etc.).
I am still running a Vigor 2760 and I was thinking after 7-10 days to try my VMG1312-B10A and see if the speed would improve: do you think it's worth the trouble ?
Tia.
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ECI cabinet I assume?
In what way is it not performing as you would like?
The gap between attainable and sync is expected as the line is interleaved.
You could lower the target SNRM with the DrayTek to get a higher sync.
The Zyxel will likely sync a Mb or 2 higher at the default 6dB but you can't lower this.
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Yes, ECI cabinet. Well, I was hoping to get something in the range of 70Mb+...
And from what you're saying, I could hope to get a speed increase only if the line will move from interleave to fast, right?
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You would get roughly 73Mb on fastpath.
You could get another 5-10Mb while still interleaved by setting a lower target SNRM on the Draytek.
That would likely increase errors so would probably prevent the line going to Fastpath.
You could also increase the SNRM target for a few days which would lower your sync, but it usually nudges DLM to move the line to fastpath.
At that point you change the SNRM back and get the roughly 73Mb i mentioned above.
You could then try lowering the SNRM target and could even get a full 80Mb. You won't be able to tell if the line would hold fastpath at those speeds until you try it.
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Okey dokey, many thanks.
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So, this is my line situation after a week ago I decided to swap a Vigor 2760 for a VMG8924-B10A.
I've attached the Draytek stats just before I disconnected it and here the stats from the ZyXEL:
xdslctl info --webstats
====================================================================================
VDSL Training Status: Showtime
Mode: VDSL2 Annex B
VDSL Profile: Profile 17a
G.Vector: Disable
Traffic Type: PTM Mode
Link Uptime: 7 days: 2 hours: 28 minutes
====================================================================================
VDSL Port Details Upstream Downstream
Line Rate: 19.027 Mbps 68.424 Mbps
Actual Net Data Rate: 19.003 Mbps 68.301 Mbps
Trellis Coding: ON ON
SNR Margin: 6.3 dB 6.0 dB
Actual Delay: 0 ms 8 ms
Transmit Power: 2.4 dBm 2.5 dBm
Receive Power: -4.4 dBm 0.8 dBm
Actual INP: 0.0 symbols 3.0 symbols
Total Attenuation: 0.0 dB 15.0 dB
Attainable Net Data Rate: 19.499 Mbps 81.403 Mbps
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 0.2 23.5 23.8 N/A N/A 10.0 19.9 33.4
Signal Attenuation(dB): 0.1 22.9 23.7 N/A N/A 10.3 19.9 33.4
SNR Margin(dB): 6.0 6.5 6.3 N/A N/A 6.3 5.9 5.9
TX Power(dBm): -4.4 -38.4 1.4 N/A N/A 9.1 7.5 7.4
====================================================================================
VDSL Counters
Downstream Upstream
Since Link time = 28 min 37 sec
FEC: 35067429 3762
CRC: 10891 574
ES: 2353 548
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 3 min 4 sec
FEC: 23377 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: 34826 16
CRC: 15 1
ES: 4 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 2 hours 33 min 4 sec
FEC: 975966 121
CRC: 215 18
ES: 47 18
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 4163803 569
CRC: 1867 97
ES: 391 93
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Total time = 1 days 2 hours 33 min 4 sec
FEC: 35067429 3762
CRC: 10891 574
ES: 2353 548
SES: 0 0
UAS: 265 265
LOS: 0 0
LOF: 0 0
LOM: 0 0
====================================================================================
It seems connection has slightly improved, is that right?
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I'd be very happy with a line that good - mine runs at approx 45/7, and that's with G.INP and 3dB on a Huawei cabinet.
:)
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Oh yes, of course I can't complain :cool: But I was thinking if I would cap the line I might be lucky and get the interleave removed :fingers:
Do you think it's feasible ?
Is this the right command:xdslctl configure --maxDataRate 40000 10000 100000
And to remove the cap, do I just reboot the rooter or I have to issue another command ?
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Not with those ES figures, no.
2353 ES in 26 hours is over 100 times more than what DLM will be looking for to remove interleaving.
You have 391 ES in 24 hours so that's just under 2000 ES in a 2 hour period.
Was DslStats running?
If you can get the line to keep at 390'ish over 24 hours then a cap (maybe in the 40-45Mb region) may remove interleaving.
If you continue to have the huge burst of ES then there's no chance of interleaving being removed.
edit: those timers are baffling me.
Link Uptime: 7 days: 2 hours: 28 minutes
Since Link time = 28 min 37 sec
Total time = 1 days 2 hours 33 min 4 sec
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Ahh I suspected so, never mind then... Not running dslstats as my knowledge of Raspberry PI is close to 0 :blush:
Do you think that the stats the modem gave me are not so realistic ?
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Can you post a recent output of "adsl info --stats"
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Ah I was using a different command...
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 19578 Kbps, Downstream rate = 81438 Kbps
Bearer: 0, Upstream rate = 19003 Kbps, Downstream rate = 68301 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): 6.0 6.4
Attn(dB): 15.0 0.0
Pwr(dBm): 2.5 2.4
VDSL2 framing
Bearer 0
MSGc: 18 13
B: 51 238
M: 1 1
T: 64 63
R: 12 16
S: 0.0242 0.4004
L: 21136 5095
D: 1337 1
I: 64 255
N: 64 255
Counters
Bearer 0
OHF: 484812776 2630042
OHFErr: 12748 676
RS: 3852823552 2575634
RSCorr: 47186599 4452
RSUnCorr: 324803 0
Bearer 0
HEC: 66585 0
OCD: 0 0
LCD: 0 0
Total Cells: 326329611 0
Data Cells: 2096975904 0
Drop Cells: 0
Bit Errors: 0 0
ES: 2774 646
SES: 0 0
UAS: 265 265
AS: 754780
Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 1.55 6.33
OR: 123.36 24.00
AgR: 68424.71 19026.93
Bitswap: 194174/194790 400/405
Total time = 8 days 17 hours 44 min 5 sec
FEC: 47186599 4452
CRC: 12748 676
ES: 2774 646
SES: 0 0
UAS: 265 265
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 14 min 5 sec
FEC: 48266 11
CRC: 1 2
ES: 1 2
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 43030 6
CRC: 5 1
ES: 1 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 17 hours 44 min 5 sec
FEC: 5817498 266
CRC: 606 41
ES: 143 38
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 7277638 545
CRC: 1466 79
ES: 325 78
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 8 days 17 hours 39 min 39 sec
FEC: 47186599 4452
CRC: 12748 676
ES: 2774 646
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
NTR: mipsCntAtNtr=0 ncoCntAtNtr=0
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Much better stats and the timers seem to match.
No need to cap the upstream. Upstream ES are counted independent of the downstream ES.
xdslctl configure --maxDataRate 50000 20000 100000
You could cap lower to ensure interleaving is removed but 50Mb should be sufficient.
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Many thanks and a reboot of the rooter will suffice to remove the cap, am I right ?
Lastly, for the lucky ones connected to an ECI cab, is there a way to get the SNR down to 3dB ?
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A reboot of the modem will remove the cap yes.
You can also remove the cap by sending the command
xdslctl configure --maxDataRate 80000 20000 100000
Lastly, for the lucky ones connected to an ECI cab, is there a way to get the SNR down to 3dB ?
Only with the DrayTek device I'm afraid.
Broadcom chipsets won't do this, only Lantiq.
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So, applied the cap and let's if it will work... :fingers:
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Too bad... after just a week I capped the line I had a re-sync, no idea why, but the cap is still there:
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 19916 Kbps, Downstream rate = 82347 Kbps
Bearer: 0, Upstream rate = 19697 Kbps, Downstream rate = 49998 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): 11.6 6.2
Attn(dB): 15.0 0.0
Pwr(dBm): 2.7 2.7
VDSL2 framing
Bearer 0
MSGc: 18 13
B: 47 238
M: 1 1
T: 64 64
R: 14 16
S: 0.0305 0.3863
L: 16240 5281
D: 1061 1
I: 62 255
N: 62 255
Counters
Bearer 0
OHF: 895366 284456
OHFErr: 1 3
RS: 229084485 1020961
RSCorr: 178405 16
RSUnCorr: 1 0
Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 168934920 0
Data Cells: 28680537 0
Drop Cells: 0
Bit Errors: 0 0
ES: 3288 1525
SES: 10 0
UAS: 340 343
AS: 1758
Bearer 0
INP: 3.50 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 1.96 6.20
OR: 97.84 24.49
AgR: 50095.92 19721.53
Bitswap: 937/938 8/8
Total time = 16 days 4 hours 50 min 34 sec
FEC: 72733183 11369
CRC: 19318 1616
ES: 3288 1525
SES: 10 0
UAS: 340 343
LOS: 1 0
LOF: 7 0
LOM: 0 0
Latest 15 minutes time = 5 min 34 sec
FEC: 6168 6
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 170667 10
CRC: 1 2
ES: 1 2
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 4 hours 50 min 34 sec
FEC: 468440 511
CRC: 4861 44
ES: 37 36
SES: 10 0
UAS: 36 39
LOS: 1 0
LOF: 7 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 1945328 1128
CRC: 223 148
ES: 59 137
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 29 min 17 sec
FEC: 178405 16
CRC: 1 3
ES: 1 3
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
NTR: mipsCntAtNtr=0 ncoCntAtNtr=0