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Standard User Ixel
(learned) Thu 21-Jun-12 09:28:21
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How are these stats looking?


[link to this post]
 
Hi all,
I need some opinions on the stats I've had recently, following roughly the same pattern daily now. I'm a tad concerned at the spike of errors in the early hours of the morning and particularly the dips that occur rarely on the attainable rate/noise margin.

Bear in mind that interleaving depth is now 1549 on the downstream and was originally 1 for the first two days of provisioning. I've noticed it also seems to show this pattern if it rains or gets rather cooler outside, it loves sunny weather.

My distance from the cabinet is about 100m walking distance (and roughly the same if I follow the route I think it's taking), wiring doesn't go to a telegraph pole, instead it goes from the wall of my house, clipped onto another wall then after about 20m or so it goes down under the pavement through ducts leading back to the PCP on the corner of the road.

I could achieve 79999 downstream if DLM didn't see errors, which I did for the first two days at least. Last of all I've had Infinity since Friday 8th June 2012.

Statistics: http://i.imgur.com/JxkxH.png

Opinions? Many thanks in advance.

Edited by Ixel (Thu 21-Jun-12 09:31:39)

Standard User adslgeek
(newbie) Thu 21-Jun-12 11:44:04
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
Hey there - just checking these stats are for FTTC, not VDSL?

Aslan
www.adslgeek.com
[dsl providers, dsl modem, dsl service and all things dsl and broadband]
Standard User Ixel
(learned) Thu 21-Jun-12 12:08:44
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Re: How are these stats looking?


[re: adslgeek] [link to this post]
 
This is for FTTC. I'm on BT Business Infinity Option 2.


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Standard User burakkucat
(experienced) Thu 21-Jun-12 12:41:51
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Re: How are these stats looking?


[re: adslgeek] [link to this post]
 
In reply to a post by adslgeek:
Hey there - just checking these stats are for FTTC, not VDSL?
Eh? Do you not appreciate that the Openreach GEA product uses VDSL2 between the DSLAM in the FTTC and the active CPE?

100% Linux and, previously, Unix.
Standard User Ixel
(learned) Thu 21-Jun-12 13:15:12
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Re: How are these stats looking?


[re: burakkucat] [link to this post]
 
I was a tad confused by his question, as that's what I thought. Anyway, can we try to keep on the topic of this thread from now on, please.
Standard User burakkucat
(experienced) Thu 21-Jun-12 13:50:29
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
In reply to a post by Ixel:
Anyway, can we try to keep on the topic of this thread from now on, please.
There is absolutely no need for the above sentence.

100% Linux and, previously, Unix.
Standard User Bald_Eagle1
(committed) Thu 21-Jun-12 18:43:01
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
The large & very sudden gap in the RSCorr graph looks very strange & doesn't coincide exactly with any other errors.

Do you always see that each day?

Are you aware of any equipment that may have switched off & back on again between roughly 00:00 & 04:00?

Or, possibly you ceased from heavy downloading for a few hours?

Is there anything in your router log that coincides with the timing such as DOS attacks etc?
Anonymous
(Unregistered)Thu 21-Jun-12 19:03:00
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Re: How are these stats looking?


[re: burakkucat] [link to this post]
 
In reply to a post by burakkucat:
In reply to a post by Ixel:
Anyway, can we try to keep on the topic of this thread from now on, please.
There is absolutely no need for the above sentence.

He's embarrassed by his mistake. smile
Standard User Ixel
(learned) Thu 21-Jun-12 19:32:19
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Re: How are these stats looking?


[re: Anonymous] [link to this post]
 
In reply to a post by Bald_Eagle1:
The large & very sudden gap in the RSCorr graph looks very strange & doesn't coincide exactly with any other errors.

Do you always see that each day?

Are you aware of any equipment that may have switched off & back on again between roughly 00:00 & 04:00?

Or, possibly you ceased from heavy downloading for a few hours?

Is there anything in your router log that coincides with the timing such as DOS attacks etc?


This is the same pattern that seems to recur daily. I don't know of any equipment between here and the cabinet that would cause this however frown. Downloading usage varies throughout the day and night. I can't see anything that would indicate I was DoS attacked or otherwise. I have JD's auto speed tester application run a test every 10 minutes too.

Any other ideas? Or do you think I should contact BT Business about what's seen on the graph? I encountered this but on a much greater scale (a scale of which made my connection eventually unusable until I re-synced it) when using the BT Openreach VDSL faceplate filter, so I swapped it over to my ADSLNation XTE-2005 which has made it so my connection is always usable.

In reply to a post by Anonymous:
In reply to a post by burakkucat:
In reply to a post by Ixel:
Anyway, can we try to keep on the topic of this thread from now on, please.
There is absolutely no need for the above sentence.

He's embarrassed by his mistake. smile


I'm not embarrassed, however I apologise if you are offended by what I said, though what I said was meaningful as it is to the anonymous reply, that what you're posting is not relevant to what I'm asking about smile.
Standard User Bald_Eagle1
(committed) Thu 21-Jun-12 19:57:17
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
I recently had a faulty BT Openreach VDSL faceplate filter.
However, the symptoms were different - massive fluctuations in SNRM levels, disconnections when using the phone, sudden "bursts" of high error counts etc.

Stats


If you see the same pattern every day it does suggest (to me anyway) that electrical equipment may be the source.

Do you have a few consecutive days of graphing to demontrate that?
Standard User asbokid
(member) Fri 22-Jun-12 02:24:10
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
In reply to a post by Ixel:
Statistics: http://i.imgur.com/JxkxH.png

Opinions? Many thanks in advance.


It's been said before that your line performs extremely well.

The attainable net data rate is very close to 100Mbps Down / 30Mbps Up. That is excellent.

See: http://www5.picturepush.com/photo/a/8548598/img/ixel...

If there is anything noteworthy at all, it is the time-dependent noise on Thurs 21/06/2012

Re-arranging the graphs aids our scrutiny. We can that the noise causing frame errors was focussed to specific times.

See: http://www5.picturepush.com/photo/a/8548588/img/Pict...

The errors abruptly start at midnight and abruptly stop at 6.30. That would suggest they are caused by a noisy electrical appliance that is energised through a timeswitch. What could that be?

It is not something that Openreach would have any remit or responsibility to fix, but maybe for your own curiosity you could try and find the source of the noise?

The radio frequency interference (if that is the cause of this noise) could be ingressing your DSL line anywhere between your modem and the DSLAM. The physical location of the noise could also be a considerable distance further away.

cheers, a

P.S. Your line is performing so well, I personally wouldn't bother!

Edited by asbokid (Fri 22-Jun-12 03:53:24)

Standard User Ixel
(learned) Fri 22-Jun-12 09:52:57
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Re: How are these stats looking?


[re: asbokid] [link to this post]
 
I see. Thanks. Yes I know the speeds on my line excellent, despite not quite reaching the 79999 actual sync due to these errors caused by some interference somewhere at a certain time. Well I'll try and locate the problem using a radio, following the path my line goes when the errors go up. If I find the cause I'll post it here incase anyone's curious to know.

Regarding the faceplate filter, do you think I should buy a new VDSL BT Openreach one, get BT to send a replacement, or just stick to the ADSLNation XTE-2005 one I have on at the moment?

Thanks again.
Standard User Ixel
(learned) Fri 22-Jun-12 13:25:24
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
Another update from this morning. Just checked my sync and interleaving depth and I've once again been knocked down with an increase in the depth. Still, the download speeds are excellent so long as this doesn't continue on the decline every couple of days by DLM.

At 5:15am~ today I lost sync, but not due to a burst of noise or anything, line was actually reasonable from the graphs I've looked at, so I can only presume DLM decided to do this based on past data. My new sync has now dropped from 73322 to 62966, upload remains at 20000, and interleaving depth is now 1709 (I think it was 1543 or something like that before) on the downstream. As long as depth doesn't go up again and/or downstream doesn't go further down then I'm happy, just a little disheartening though frown.

Is it normal for bitswap on the downstream to increment virtually every second or two?

Edited by Ixel (Fri 22-Jun-12 13:27:23)

Standard User RobertoS
(sensei) Fri 22-Jun-12 13:30:11
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
Where are you checking the interleaving depth? Those are very strange numbers.

I get mine from the D: line in the xdslcmd info --stats output.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre 80/20 trial.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Standard User Ixel
(learned) Fri 22-Jun-12 14:41:27
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Re: How are these stats looking?


[re: RobertoS] [link to this post]
 
Exactly where you've said, xdslcmd info --stats.

Here's a link to the latest output of that: http://pastebin.com/4UqAfVdc

With interleaving depth increased more and sync decreased the error counts have dropped to virtually nothing, so I'm hoping this is the final time DLM will make things worse speed wise.

Edited by Ixel (Fri 22-Jun-12 14:43:12)

Standard User Bald_Eagle1
(committed) Fri 22-Jun-12 14:59:18
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Re: How are these stats looking?


[re: RobertoS] [link to this post]
 
Hey RobertoS,

We're not all "happy bunnies" on more than 40Mb with Interleaving at 1 & 1 you know wink

Following loads of repair works my interleaving depths are currently down to 453 & 1, but have been at various depths right up to 1700, in very odd looking increments at times.
Standard User Ixel
(learned) Fri 22-Jun-12 15:55:50
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Re: How are these stats looking?


[re: Bald_Eagle1] [link to this post]
 
I'd be happy with something like 50Mbps downstream with an interleaving depth on minimal levels or not at all. My depth is over 1700 now, which slightly worries me. The connection seemed fine on the interleaving depth that I previously had, with 73322 downstream, but DLM didn't seem to agree.
Standard User burakkucat
(experienced) Fri 22-Jun-12 16:17:00
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
In reply to a post by Ixel:
. . . Well I'll try and locate the problem using a radio, following the path my line goes when the errors go up. If I find the cause I'll post it here incase anyone's curious to know.
Yes, please do. (Felines are naturally curious. wink )
Regarding the faceplate filter, do you think I should buy a new VDSL BT Openreach one, get BT to send a replacement, or just stick to the ADSLNation XTE-2005 one I have on at the moment?
You might as well stick with your ADSL Nation centralised filter, as it is installed and operating correctly. Although the current SSFPs (installed by Openreach) are Pressac manufactured products, there is a gathering body of evidence that there is something "not quite right" either in the design or the construction. So as things stand, if in doubt, replace the Openreach installed SSFP with the earlier version (once again a Pressac manufactured device) or the ADSL Nation device.

100% Linux and, previously, Unix.
Standard User RobertoS
(sensei) Sat 23-Jun-12 00:20:20
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
Yuk frown.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre 80/20 trial.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Standard User RobertoS
(sensei) Sat 23-Jun-12 00:23:05
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Re: How are these stats looking?


[re: Bald_Eagle1] [link to this post]
 
I'm surprised how you put up with me and the others, given your messy line.

I had my troubles back in ADSL Max days, and also on O2. Maybe I've used my quota.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre 80/20 trial.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Standard User Ixel
(learned) Sat 23-Jun-12 09:23:05
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Re: How are these stats looking?


[re: RobertoS] [link to this post]
 
Yuk indeed.

Here's statistics for the latest 7 days: http://i.imgur.com/IjTXF.png

I'm still concerned with the RSCorr graph, but I'm not sure if I can justify calling BT or whether they can ever do anything about this if it's some appliance outside of the boundaries of my house which is causing interference.
Standard User Bald_Eagle1
(committed) Sat 23-Jun-12 11:39:20
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Re: How are these stats looking?


[re: Ixel] [link to this post]
 
In reply to a post by Ixel:
Here's statistics for the latest 7 days: http://i.imgur.com/IjTXF.png

Just a comment:-

When plotting the graphs, it helps to use multiples of 4 to keep the time along the x axis in order & easier to detect patterns, especially when plotting a few days together.
e.g. 40 m, 8 d, 12 h etc.
Standard User Ixel
(learned) Sun 24-Jun-12 09:10:24
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Re: How are these stats looking?


[re: Bald_Eagle1] [link to this post]
 
I see. I'll do that next time I submit one.

The good news is DLM has restored my previous profile of 73322 a slightly lower interleaving depth again. I was disconnected early this morning, but not by lack of noise margin or massive errors, so I can only presume DLM did this. It happened around 5am from what I can see.
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