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Detecting FEC errors with Billion 7800N.
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- Re: Detecting FEC errors with Billion 7800N.
Detecting FEC errors with Billion 7800N.
17-03-2015 9:08 PM
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Hi,
I am trying to see how many FEC errors there are in my connection.
Can somebody please look at today's router stats from our Billion 7800N router?
I'm unsure how to interepret them. What do I need to keep an eye on please?
Thanks.
[tt]> adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 1172 Kbps, Downstream rate = 12064 Kbps
Path: 0, Upstream rate = 1173 Kbps, Downstream rate = 6652 Kbps
Link Power State: L0
Mode: ADSL2+
TPS-TC: ATM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 1.4 5.5
Attn(dB): 36.0 21.4
Pwr(dBm): 0.0 12.8
ADSL2 framing
MSGc: 94 45
B: 14 51
M: 1 1
T: 9 1
R: 8 0
S: 0.0716 1.3913
L: 2569 299
😧 416 1
Counters
SF: 17061783 367545
SFErr: 655 792
RS: 2470702972 0
RSCorr: 153441685 0
RSUnCorr: 24977 0
HEC: 460 879
OCD: 32 0
LCD: 0 0
Total Cells: 18753722 759056100
Data Cells: 295552566 18919317
Drop Cells: 73
Bit Errors: 0 57732
ES: 419 278
SES: 0 7
UAS: 34 34
AS: 274953
INP: 5.18 0.00
PER: 16.11 17.73
delay: 7.44 0.34
OR: 49.64 23.00
Bitswap: 11151 57
Total time = 1 days 4 hours 23 min 21 sec
FEC: 153441685 0
CRC: 655 792
ES: 419 278
SES: 0 7
UAS: 34 34
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 8 min 21 sec
FEC: 766011 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 1037005 0
CRC: 0 3
ES: 0 3
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 4 hours 23 min 21 sec
FEC: 14795414 0
CRC: 9 11
ES: 7 11
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 58303279 0
CRC: 222 63
ES: 151 54
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 3 days 4 hours 22 min 35 sec
FEC: 153441685 0
CRC: 655 792
ES: 419 278
SES: 0 7
UAS: 0 0
LOS: 0 0
LOF: 0 0[/tt]
I am trying to see how many FEC errors there are in my connection.
Can somebody please look at today's router stats from our Billion 7800N router?
I'm unsure how to interepret them. What do I need to keep an eye on please?
Thanks.
[tt]> adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 1172 Kbps, Downstream rate = 12064 Kbps
Path: 0, Upstream rate = 1173 Kbps, Downstream rate = 6652 Kbps
Link Power State: L0
Mode: ADSL2+
TPS-TC: ATM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 1.4 5.5
Attn(dB): 36.0 21.4
Pwr(dBm): 0.0 12.8
ADSL2 framing
MSGc: 94 45
B: 14 51
M: 1 1
T: 9 1
R: 8 0
S: 0.0716 1.3913
L: 2569 299
😧 416 1
Counters
SF: 17061783 367545
SFErr: 655 792
RS: 2470702972 0
RSCorr: 153441685 0
RSUnCorr: 24977 0
HEC: 460 879
OCD: 32 0
LCD: 0 0
Total Cells: 18753722 759056100
Data Cells: 295552566 18919317
Drop Cells: 73
Bit Errors: 0 57732
ES: 419 278
SES: 0 7
UAS: 34 34
AS: 274953
INP: 5.18 0.00
PER: 16.11 17.73
delay: 7.44 0.34
OR: 49.64 23.00
Bitswap: 11151 57
Total time = 1 days 4 hours 23 min 21 sec
FEC: 153441685 0
CRC: 655 792
ES: 419 278
SES: 0 7
UAS: 34 34
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 8 min 21 sec
FEC: 766011 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 1037005 0
CRC: 0 3
ES: 0 3
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 4 hours 23 min 21 sec
FEC: 14795414 0
CRC: 9 11
ES: 7 11
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 58303279 0
CRC: 222 63
ES: 151 54
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 3 days 4 hours 22 min 35 sec
FEC: 153441685 0
CRC: 655 792
ES: 419 278
SES: 0 7
UAS: 0 0
LOS: 0 0
LOF: 0 0[/tt]
Message 1 of 8
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7 REPLIES 7
Re: Detecting FEC errors with Billion 7800N.
17-03-2015 9:25 PM
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Hi
Are you tweaking that downstream noise margin?
1 million FEC's in 15 mins, that must make the broadband unusable, is the router connected to the master socket?
I would try a default noise margin (6 dB) then see how the line "feels" then.
Ian
Are you tweaking that downstream noise margin?
Quote Previous 15 minutes time = 15 min 0 sec
FEC: 1037005 0
1 million FEC's in 15 mins, that must make the broadband unusable, is the router connected to the master socket?
I would try a default noise margin (6 dB) then see how the line "feels" then.
Ian
Message 2 of 8
(1,230 Views)
Re: Detecting FEC errors with Billion 7800N.
17-03-2015 9:51 PM
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The line is still banded at 6652k - the speed will not exceed this value until the banding gets removed. The banded profile has also set a very large interleaving depth of 416. In the past, I would have expected the SNR margin to be high with a banded profile, but I've heard that that doesn't necessarily happen anymore.
FEC count is corrected errors, they shouldn't make the broadband unusable. My line can clock up FEC errors at a rate of a few thousand per second, which in itself is not really a significant problem.
I am thinking the huge FEC counts might be due to the unusually high interleaving depth from the banded profile - and since the banding was due to the router being unplugged, it might be simpler to just get Plusnet to remove the banding, and then it would be easier to see if there's really any other problem with the line operating in a more normal configuration.
FEC count is corrected errors, they shouldn't make the broadband unusable. My line can clock up FEC errors at a rate of a few thousand per second, which in itself is not really a significant problem.
I am thinking the huge FEC counts might be due to the unusually high interleaving depth from the banded profile - and since the banding was due to the router being unplugged, it might be simpler to just get Plusnet to remove the banding, and then it would be easier to see if there's really any other problem with the line operating in a more normal configuration.
Message 3 of 8
(1,230 Views)
Re: Detecting FEC errors with Billion 7800N.
18-03-2015 8:23 PM
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Thanks for the replies.
Yes I had it lowered to 1.5dB.
I've set the SNR to the default 6 dB to see if the FECs go away....
(One youtube film later.....)
I've repeated the full stats so you can see any ratios.
[tt]> adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 1184 Kbps, Downstream rate = 9376 Kbps
Path: 0, Upstream rate = 1184 Kbps, Downstream rate = 6650 Kbps
Link Power State: L0
Mode: ADSL2+
TPS-TC: ATM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.3 5.9
Attn(dB): 36.5 21.5
Pwr(dBm): 0.0 12.8
ADSL2 framing
MSGc: 95 45
B: 18 51
M: 1 1
T: 7 1
R: 4 0
S: 0.0907 1.3774
L: 2028 302
😧 352 1
Counters
SF: 39903 36417
SFErr: 0 1
RS: 28211498 0
RSCorr: 321 0
RSUnCorr: 0 0
HEC: 0 2
OCD: 0 0
LCD: 0 0
Total Cells: 10031693 1772840
Data Cells: 6624928 277906
Drop Cells: 106
Bit Errors: 0 50
ES: 545 329
SES: 0 7
UAS: 107 107
AS: 640
INP: 2.77 0.00
PER: 16.03 17.56
delay: 7.98 0.34
OR: 50.38 23.23
Bitswap: 10 0
Total time = 1 days 11 hours 33 min 43 sec
FEC: 248692172 0
CRC: 826 854
ES: 545 329
SES: 0 7
UAS: 107 107
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 3 min 43 sec
FEC: 124 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 230195 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 73 73
LOS: 0 0
LOF: 0 0
Latest 1 day time = 11 hours 33 min 43 sec
FEC: 40341741 0
CRC: 46 38
ES: 38 31
SES: 0 0
UAS: 73 73
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 69704160 0
CRC: 134 35
ES: 95 31
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 10 min 39 sec
FEC: 321 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
>[/tt]
It's a vast improvement. The FEC' s are a lot lower now Ian. Downstream is lower than I would have wished but it is a big improvement on 6500.
Thanks ejs for that glimmer of hope.
I'll give the faults team a ring at 5am and see if they can get the banding taken off.
Quote Are you tweaking that downstream noise margin?
Yes I had it lowered to 1.5dB.
I've set the SNR to the default 6 dB to see if the FECs go away....
(One youtube film later.....)
I've repeated the full stats so you can see any ratios.
[tt]> adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 1184 Kbps, Downstream rate = 9376 Kbps
Path: 0, Upstream rate = 1184 Kbps, Downstream rate = 6650 Kbps
Link Power State: L0
Mode: ADSL2+
TPS-TC: ATM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.3 5.9
Attn(dB): 36.5 21.5
Pwr(dBm): 0.0 12.8
ADSL2 framing
MSGc: 95 45
B: 18 51
M: 1 1
T: 7 1
R: 4 0
S: 0.0907 1.3774
L: 2028 302
😧 352 1
Counters
SF: 39903 36417
SFErr: 0 1
RS: 28211498 0
RSCorr: 321 0
RSUnCorr: 0 0
HEC: 0 2
OCD: 0 0
LCD: 0 0
Total Cells: 10031693 1772840
Data Cells: 6624928 277906
Drop Cells: 106
Bit Errors: 0 50
ES: 545 329
SES: 0 7
UAS: 107 107
AS: 640
INP: 2.77 0.00
PER: 16.03 17.56
delay: 7.98 0.34
OR: 50.38 23.23
Bitswap: 10 0
Total time = 1 days 11 hours 33 min 43 sec
FEC: 248692172 0
CRC: 826 854
ES: 545 329
SES: 0 7
UAS: 107 107
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 3 min 43 sec
FEC: 124 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 230195 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 73 73
LOS: 0 0
LOF: 0 0
Latest 1 day time = 11 hours 33 min 43 sec
FEC: 40341741 0
CRC: 46 38
ES: 38 31
SES: 0 0
UAS: 73 73
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 69704160 0
CRC: 134 35
ES: 95 31
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 10 min 39 sec
FEC: 321 0
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
>[/tt]
It's a vast improvement. The FEC' s are a lot lower now Ian. Downstream is lower than I would have wished but it is a big improvement on 6500.
Quote I am thinking the huge FEC counts might be due to the unusually high interleaving depth from the banded profile - and since the banding was due to the router being unplugged, it might be simpler to just get Plusnet to remove the banding, and then it would be easier to see if there's really any other problem with the line operating in a more normal configuration.
Thanks ejs for that glimmer of hope.
I'll give the faults team a ring at 5am and see if they can get the banding taken off.
Message 4 of 8
(1,230 Views)
Re: Detecting FEC errors with Billion 7800N.
26-03-2015 12:02 PM
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Last Friday I raised a ticket to get my banding taken off.
Can somebody please look at Question #101257128?
Thanks.
Can somebody please look at Question #101257128?
Thanks.
Message 5 of 8
(1,230 Views)
Re: Detecting FEC errors with Billion 7800N.
26-03-2015 12:30 PM
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Message 6 of 8
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Re: Detecting FEC errors with Billion 7800N.
26-03-2015 12:35 PM
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Message 7 of 8
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Re: Detecting FEC errors with Billion 7800N.
26-03-2015 5:06 PM
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Thanks Tony.
After a snr tweak...
Here are my router stats:
[tt]> adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 1160 Kbps, Downstream rate = 11752 Kbps
Path: 0, Upstream rate = 1163 Kbps, Downstream rate = 9231 Kbps
Link Power State: L0
Mode: ADSL2+
TPS-TC: ATM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 1.8 5.9
Attn(dB): 36.0 21.4
Pwr(dBm): 0.0 12.8
ADSL2 framing
MSGc: 51 65
B: 164 36
M: 1 1
T: 2 1
R: 0 0
S: 0.5701 0.9899
L: 2315 299
😧 1 1
Counters
SF: 17158 15884
SFErr: 45 0
RS: 0 0
RSCorr: 0 0
RSUnCorr: 0 0
HEC: 27 0
OCD: 1 0
LCD: 0 0
Total Cells: 6076903 751454
Data Cells: 3469 3665
Drop Cells: 106
Bit Errors: 0 0
ES: 4068 799
SES: 35 21
UAS: 384 384
AS: 279
INP: 0.00 0.00
PER: 16.25 17.57
delay: 0.14 0.24
OR: 28.06 32.32
Bitswap: 8 0
Total time = 1 days 8 hours 25 min 56 sec
FEC: 0 0
CRC: 4857 0
ES: 4068 799
SES: 35 21
UAS: 384 384
LOS: 3 0
LOF: 25 0
Latest 15 minutes time = 10 min 56 sec
FEC: 0 0
CRC: 56 0
ES: 42 0
SES: 0 0
UAS: 74 74
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 21 0
ES: 21 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 8 hours 25 min 56 sec
FEC: 0 0
CRC: 1411 0
ES: 899 12
SES: 3 0
UAS: 74 74
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 0 0
CRC: 3446 0
ES: 2338 66
SES: 22 1
UAS: 114 114
LOS: 2 0
LOF: 17 0
Since Link time = 4 min 39 sec
FEC: 0 0
CRC: 45 0
ES: 35 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0[/tt]
After a snr tweak...
Here are my router stats:
[tt]> adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 8000
Max: Upstream rate = 1160 Kbps, Downstream rate = 11752 Kbps
Path: 0, Upstream rate = 1163 Kbps, Downstream rate = 9231 Kbps
Link Power State: L0
Mode: ADSL2+
TPS-TC: ATM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 1.8 5.9
Attn(dB): 36.0 21.4
Pwr(dBm): 0.0 12.8
ADSL2 framing
MSGc: 51 65
B: 164 36
M: 1 1
T: 2 1
R: 0 0
S: 0.5701 0.9899
L: 2315 299
😧 1 1
Counters
SF: 17158 15884
SFErr: 45 0
RS: 0 0
RSCorr: 0 0
RSUnCorr: 0 0
HEC: 27 0
OCD: 1 0
LCD: 0 0
Total Cells: 6076903 751454
Data Cells: 3469 3665
Drop Cells: 106
Bit Errors: 0 0
ES: 4068 799
SES: 35 21
UAS: 384 384
AS: 279
INP: 0.00 0.00
PER: 16.25 17.57
delay: 0.14 0.24
OR: 28.06 32.32
Bitswap: 8 0
Total time = 1 days 8 hours 25 min 56 sec
FEC: 0 0
CRC: 4857 0
ES: 4068 799
SES: 35 21
UAS: 384 384
LOS: 3 0
LOF: 25 0
Latest 15 minutes time = 10 min 56 sec
FEC: 0 0
CRC: 56 0
ES: 42 0
SES: 0 0
UAS: 74 74
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 21 0
ES: 21 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 8 hours 25 min 56 sec
FEC: 0 0
CRC: 1411 0
ES: 899 12
SES: 3 0
UAS: 74 74
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 0 0
CRC: 3446 0
ES: 2338 66
SES: 22 1
UAS: 114 114
LOS: 2 0
LOF: 17 0
Since Link time = 4 min 39 sec
FEC: 0 0
CRC: 45 0
ES: 35 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0[/tt]
Message 8 of 8
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- Re: Detecting FEC errors with Billion 7800N.