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Standard User mlmclaren
(experienced) Fri 20-Mar-15 12:46:30
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Re: 80/20 > 40/20 Stability?


[re: deleted] [link to this post]
 
I did down modem stats the other day,

Note that both the pictures I've linked you are from the other day and speeds have dropped further er since then,

I will see if I can pull some more stats later.

These are what I pulled from the modem the other day

http://tinypic.com/r/2467sj8/8

Plusnet Fibre Extra @ 500M HG612 > Linksys LRT224
Standard User deleted
(deleted) Fri 20-Mar-15 12:56:48
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Re: 80/20 > 40/20 Stability?


[re: mlmclaren] [link to this post]
 
In reply to a post by mlmclaren:
The fact that i'm seeing inconsistent and unstable speeds and that streams keep stopping randomly and that I have to intermittently refresh webpages 2/3 times for they load successfully.


Some of those issues could indicate a problem - especially if they see any re-syncs happening.

I also noted that in my experience Interleaving isn't normally applied at such a high rate straight away and that it normally staggers until errors stop but in this case that didn't seem to happen.


From what I've seen, which isn't enough yet, interleaving hasn't intervened in a particularly high rate. It looks quite standard so far...
Standard User deleted
(deleted) Fri 20-Mar-15 12:58:10
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Re: 80/20 > 40/20 Stability?


[re: deleted] [link to this post]
 
In reply to a post by BatBoy:
Unfortunately the attenuation isn't shown, but there is a large gap between sync speed and attainable speed.


That's normal for the HG612 when DLM has intervened to put FEC and interleaving on; while the sync speed drops, the attainable goes up by a similar amount.


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Standard User deleted
(deleted) Fri 20-Mar-15 13:00:06
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Re: 80/20 > 40/20 Stability?


[re: deleted] [link to this post]
 
That often indicates a fault.
Standard User deleted
(deleted) Fri 20-Mar-15 13:05:20
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Re: 80/20 > 40/20 Stability?


[re: mlmclaren] [link to this post]
 
In reply to a post by mlmclaren:
Note that both the pictures I've linked you are from the other day and speeds have dropped further er since then,


Right. A monitoring programme would certainly help to see changes as and when they happen.

http://tinypic.com/r/2467sj8/8


It would help to see a few things lower down, particularly the INP and delay values.

The amount of FEC overhead downstream is 20%, which isn't especially high. However, you have a lot of FEC overhead upstream, alongside interleaving.

That suggests you are getting delays on both upstream and downstream, which would be affecting latency even more. Seeing the INP and delay settings will help to understand what DLM has asked for.

What would be really worthwhile is to monitor the changes to INP and delay over time - to see if DLM is making changes; DLM normally responds to resyncs and errors - so it would be good to see those over time too. I'd definitely recommend one of those monitoring setups.
Standard User deleted
(deleted) Fri 20-Mar-15 13:05:42
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Re: 80/20 > 40/20 Stability?


[re: deleted] [link to this post]
 
What does?
Standard User mlmclaren
(experienced) Fri 20-Mar-15 13:09:22
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Re: 80/20 > 40/20 Stability?


[re: deleted] [link to this post]
 
In reply to a post by WWWombat:
From what I've seen, which isn't enough yet, interleaving hasn't intervened in a particularly high rate. It looks quite standard so far...


I don't think a jump of 16ms on my BQM is normal after fault free since connection on fast path.

Plusnet Fibre Extra @ 500M HG612 > Linksys LRT224
Standard User deleted
(deleted) Fri 20-Mar-15 13:13:45
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Re: 80/20 > 40/20 Stability?


[re: deleted] [link to this post]
 
The post I replied to, obviously.
Standard User mlmclaren
(experienced) Fri 20-Mar-15 14:07:06
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Re: 80/20 > 40/20 Stability?


[re: deleted] [link to this post]
 
So you agree that some of the settings on the connection need changing or resetting, as you said, interleaving has been set on both downstream and upstream with a delay of 8 (I saw in modem stats)

and if I'm right, your saying that if their is any fault it is on upstream and not downstream..

Here is my modem stats before the issues!

http://tinypic.com/r/2zz7ur8/8

58-59mbps download 17-18mbps upload and 11ms ping (rapidswitch, Maidenhead)

Plusnet Fibre Extra @ 500M HG612 > Linksys LRT224
Standard User mlmclaren
(experienced) Fri 20-Mar-15 18:04:37
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Re: 80/20 > 40/20 Stability?


[re: mlmclaren] [link to this post]
 
I've ulled the stats from my modem using telnet, they're as follows!

# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 25613 Kbps, Downstream rate = 66816 Kbps
Path: 0, Upstream rate = 19999 Kbps, Downstream rate = 56570 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): 6.2 6.6
Attn(dB): 0.0 0.0
Pwr(dBm): 13.6 7.1
VDSL2 framing
Path 0
B: 47 29
M: 1 1
T: 64 64
R: 12 10
S: 0.0270 0.0476
L: 17782 6717
D: 1201 673
I: 60 40
N: 60 40
Counters
Path 0
OHF: 8669008 3289725
OHFErr: 0 0
RS: 2219265617 3949549
RSCorr: 20892 11700
RSUnCorr: 0 0

Path 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 1634720162 0
Data Cells: 23551617 0
Drop Cells: 0
Bit Errors: 0 0

ES: 6 0
SES: 5 0
UAS: 127 127
AS: 15037

Path 0
INP: 3.00 4.00
PER: 1.72 4.57
delay: 8.00 8.00
OR: 111.13 73.46

Bitswap: 1747 643

Total time = 8 hours 44 min 0 sec
FEC: 48364 27567
CRC: 2945 0
ES: 6 0
SES: 5 0
UAS: 127 127
LOS: 5 0
LOF: 5 0
Latest 15 minutes time = 14 min 0 sec
FEC: 18 55
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: 1714 677
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 8 hours 44 min 0 sec
FEC: 48364 27567
CRC: 2945 0
ES: 6 0
SES: 5 0
UAS: 127 127
LOS: 5 0
LOF: 5 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
Since Link time = 4 hours 10 min 35 sec
FEC: 20892 11700
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
# xdslcmd info --stats


Plusnet Fibre Extra @ 500M HG612 > Linksys LRT224
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