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Author Topic: Major Power Outage in Leicester - Effects on Circuit  (Read 5313 times)

Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #120 on: July 17, 2017, 09:08:23 PM »

I have not done any disconnections or modem power cycles, they all out of the blue.

They also all last for at least a few minutes.  So the sync light stays completely off for a short time before flashing again.

Bear in mind I have also had dslstats problems, so there is bigger gaps on the mdws plots than the outage lengths.
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tbailey2

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #121 on: July 17, 2017, 09:17:26 PM »

My concern is the modem disconnections are these being forced by yourself or your line just disconnects out of the blue ?
If you look, you'll see that except for the last resync, the others are mostly RDIs...
« Last Edit: July 18, 2017, 07:13:16 AM by tbailey2 »
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NewtronStar

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #122 on: July 17, 2017, 09:19:46 PM »

I am not doubting you it's the MDWS connection that made me wonder, Look random disconnects are the worse kind of fault the next would be no DSL signal anything else like lower sync rate or loss of fast path to interleaving is a small drop in the ocean, Have always said line stability is paramount over line speed.
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Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #123 on: July 17, 2017, 09:38:25 PM »

I agree newt, obviously if it carries on like this I will not let sky close the fault.  But I have to give it time to see if the drops stop when openreach have stopped their work, their fault close time was 8 mins after the modem last synced.

If the dropouts stop but the high ES continues then I may well cap the line to a lower speed to get the ES to a rate I am happier with.  I actually have no intention of asking for the 74mbit banding to be removed, its probably not a good idea to push this line to a 6db margin with how things are going.

Ok so it seems dslstats stopped about 7am and it was about 11.30am when I restarted it, any other gaps are outages.

My pfsense is auto falling connectivity back to EE mobile data as well which will shorten the gaps of data been sent to MDWS but I think if the dsl sync is down nothing gets sent anyway? not sure on that,

For now I have hg612 stats sending to mdws until I get to the bottom of the dslstats problems.  So there shouldnt be a monitoring problem tonight.

http://i.imgur.com/bHYGYuq.jpg

can see the jump after 4pm
« Last Edit: July 17, 2017, 09:53:58 PM by Chrysalis »
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NewtronStar

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #124 on: July 17, 2017, 10:44:38 PM »

As for the errored seconds lets travel back in time by 30 days DR Who style this time as a female you were hitting 135 per day and now 248 + it's not extreme you gained a sync of 6Mbps and gained 10Mbps attainable so it very obvious you well see more errored seconds it will still remain in amber
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Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #125 on: July 17, 2017, 10:49:36 PM »

the daily total is misleading as it includes the 4 hours missing and the lowered ES from before 4pm.

If the ES slows down again in the morning then fine.

This is my thinking, first I think I am now on the middle DLM profile, it looks like sky may have moved me back at some point, so 1440 new daily ES limit.

It looks like this line might routinely now hit the 600-700 range for ES on a daily basis giving less than a 1000 ES headroom for error bursts and the like, whilst previously I had over a 2000 ES headroom.  On the flipside tho the line I think should have more resilience to "external" interference such as storms if it keeps the higher snrm.  Previously my line could keep under half this ES rate with a 4.5db snrm, but of course it had lower levels of QLN to deal with.

Roll on g.inp, lets hope there is no problems with the summer testing.
« Last Edit: July 17, 2017, 11:01:59 PM by Chrysalis »
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NewtronStar

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #126 on: July 17, 2017, 10:56:04 PM »

If I fill in your MDWS blanks I would say 540 how does that sound to you
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Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #127 on: July 17, 2017, 11:02:30 PM »

If I fill in your MDWS blanks I would say 540 how does that sound to you

realistic if the ES slows down again later, too low if it maintains the average hourly rate since the 4pm resync.
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NewtronStar

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #128 on: July 17, 2017, 11:10:58 PM »

What the worst that can happen A you go above 1440 es per day then Interleaved and back to Fastpath in a weeks time

The worst case would be B you go above 10 disconnects per day and become banded this looks very unlikely from your stats
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Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #129 on: July 17, 2017, 11:22:16 PM »

to me interleaving is unacceptable :) especially if my line loops between interleaving and fast path continuously.

Banding I am not so bothered about.  Stability and latency are more important to me.  I have even been considering dropping to 40/10 and the only thing that stopped me when I renewed with sky was that they dont offer a static ip on 40/10.

If my ES goes above 600 regularly I think I will apply a 70000kbit cap to the sync to reduce it, I got a feeling the sync will be stable now tho, as I am pretty sure I usually would have had an outage during the evening by now.
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NewtronStar

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #130 on: July 18, 2017, 12:02:48 AM »

You may get some T/Storms on Wednesday something to keep an eye on
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Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #131 on: July 18, 2017, 12:27:07 AM »

close to 1 ES/min now, 20 since midnight. O_o its increasing each passing hour.

interesting it seems at least on my line with this modem there is a cap on the bitswaps/min, the cap seems to have been long term on my line but before this fault it was only reached for short periods of the day.

during this past week the bitswapping rises sharply during the evening and then hits this cap of about 22-23/min but drops again the next morning.  Can see the line is flatlined on MDWS like it hit a ceiling, but it is occasionally able to spike over it.  On the previous days it might be easy to assume the line is flat because of an outage but no outage so far this evening so these are actual readings.

This probably explains the steadily rising ES of which I expect to reduce tommorow morning, but has no bearing on the doubling of ES since the resync as at 4-5pm the bitswaps were still low..
« Last Edit: July 18, 2017, 12:56:05 AM by Chrysalis »
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Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #132 on: July 18, 2017, 01:06:55 PM »

ok I wont be closing the fault.

The flat line of bitswaps at 22/min just carried on, and it looks like the problem eventually causes the line to lose sync, the line lost sync around 8am and then when it came back up bitswaps were low again. Interesting as well is the last update was 8.07am to mdws and then 9.26am for the next so the outage looks like it lasted for over an hour.

Not visible on mdws is HEC errors, these have been huge, before the fault my HEC was always similar to the CRC count now its many times more.

Not sure what I will be saying to sky yet, whether I just keep it dumbed down that the line went down for over an hour, or try to explain all the odd behaviour.
« Last Edit: July 18, 2017, 01:09:21 PM by Chrysalis »
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tbailey2

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #133 on: July 18, 2017, 03:20:48 PM »

Not visible on mdws is HEC errors, these have been huge, before the fault my HEC was always similar to the CRC count now its many times more.


I've added Header Error Control/min as B0 HEC after B0 FEC in the list as the data is available.
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Chrysalis

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Re: Major Power Outage in Leicester - Effects on Circuit
« Reply #134 on: July 18, 2017, 03:24:54 PM »

cool, great tony :)
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