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[kitz]

On my line the 8800NL was the best of the 63168 devices for errors.

Thanks les... and yes the observations between 2 firmwares would be very interesting too. As you know I dont appear to have the same issue as you on a 63168.

It would also be interesting to see how erics line performs with the 8800NL on his new line.   Im pretty certain that it was the swapping of routers that caused the DLM to intervene on adslmax's line and not the ErrSecs.

[adslmax]

And interesting that your DLM haven't been hit yet? I think it probably down to my own fault for modem swap over too much and probably DLM take no notice of my Billion errors but force to put me on interleaved on because of too much disconnected?

Here is my stats on openreach modem for 10 hours ongoing since DLM was hit.

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 38017 Kbps, Downstream rate = 105908 Kbps
Path: 0, Upstream rate = 19999 Kbps, Downstream rate = 72946 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): 10.3 14.8
Attn(dB): 0.0 0.0
Pwr(dBm): 12.5 -0.3
VDSL2 framing
Path 0
B: 47 28
M: 1 1
T: 64 64
R: 16 10
S: 0.0209 0.0461
L: 24450 6772
D: 1147 679
I: 64 39
N: 64 39
Counters
Path 0
OHF: 28852273 1191063
OHFErr: 0 1
RS: 3091214195 3199185
RSCorr: 4749 18371
RSUnCorr: 0 0

Path 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 1148195365 0
Data Cells: 21488176 0
Drop Cells: 0
Bit Errors: 0 0

ES: 0 1
SES: 0 0
UAS: 19 19
AS: 38821

Path 0
INP: 3.00 4.00
PER: 1.34 4.42
delay: 6.00 8.00
OR: 119.38 65.11

Bitswap: 12 30

Total time = 10 hours 47 min 24 sec
FEC: 4749 18371
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 19 19
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 2 min 24 sec
FEC: 0 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: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 10 hours 47 min 24 sec
FEC: 4749 18371
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 19 19
LOS: 0 0
LOF: 0 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 = 10 hours 47 min 1 sec
FEC: 4749 18371
CRC: 0 1
ES: 0 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
#

So I have to pray hopefully tomorrow DLM will think my line is good enough and put me back on the maximum rate and fast path. Only wait and see.

[kitz]

mhmmm yep that what I said.   Others get far more errors than you did and the DLM leaves them alone.


The only time EVER that Ive been caught by the DLM is when I used the TP-link.  There was an issue with the first fw... which looked like from what I could see that bitswap wasnt working correctly - seee a low bitswap count isnt always good thing.  Theyve sorted it though now.. but not before my line took a hammering and struggled to retain 80/20.    I didnt notice till much later that the DLM had kicked in (no proper stats!) .. which is why I dont know how long it took to be corrected.. my guess is a week.

[Chrysalis]

1 - does this have the same new broadcom as the zyxel kitz highly rates?
2 - does it support bridge mode so I can use it like the hg612 as modem only?
3 - can it collect full stats via eric's or BE's tools?

on #2 I think it has briodge mdoem but ideally would like somene to confirm, quote from specs.

Bridged or routed Ethernet encapsulation

[adslmax]

Do u think it will resync itself in the next days to a week to bring my FTTC back as it was. As I leave it alone for now. Let the DLM work it out. I hope it will be a week as plusnet staff warned me it could take up to six months for the DLM to act. WTF six months?

and today i don't feel happy at all. i hate when my sync rate get lower and worse case ip profile is dropped from 77.43Mbps to 70.6Mbps and throughput speed was far worse at 67Mbps now. And horrible high ping before was 8ms and now 24ms.

[Chrysalis]

Be careful max.   The amount of errors you were seeing was very small and not sufficient to attract the attention of the DLM.
Im pretty certain it doesnt look at CRCs and FECs as a trigger.  Im also not too convinced that it uses Err/Secs either... because 1 CRC will trigger an ErrSec..  so IMHO its more likely to look at SES and UAS.

You are however very likely to attract the DLMs attention through keep swapping routers.  I hope you are powering down correctly and waiting before putting the new one back on the line.

Plus as has already been mentioned, things like CRCs may take a little while to settle down after putting a different router on.   When I was on adsl2+ I could go weeks without a single CRC error, but it would always give me a handful or so straight after a resync. 

kitz I think its daily ES count or ES count per a set interval, BS has mentioned MTBE which suggests ES also.  I am not convinced CRC and SES are never used but ES does seem to be used.

His disconnections I expect to not cause DLM to react, I had during my fault 16 disconnections in one night and I stayed on fast path and I remember plusnet quoting something like 20 allowed which is quite generous.

On TBB someone mentioned 2880 ES per day.

[kitz]

Do u think it will resync itself in the next days to a week to bring my FTTC back as it was. As I leave it alone for now. Let the DLM work it out.

No swapping routers unless you leave it for minimum of half hour between!   
Yes it will resync itself - mine did at exactly 6am as you can see from the graph I posted earlier.  It shouldnt take months - thats only if you have really been badly affected which you havent.  No one knows for sure all I can say is that mine took about a week,  Aardvarks took about 2 weeks.

[adslmax]

I am not sure why is DLM was target my line. I only swap three times yesterday but a month ago, my power was cut off five times in the space of an hour and didn't trigger DLM at all.

It could be total count of how many disconnected since February if it went pass over 20 times, then DLM could be trigger or could be too much errors from billion?

I dunno why?

I do wish Plusnet tell me what caused the DLM as they cannot find out what has caused this? No report from BT end to explain why it got interleaved on?

[adslmax]

Kitz - are you saying when switch off the VDSL2 modem off the main socket leave it off for 30 minutes plus the phone line too (leave it on the socket for 30 minutes) ? If both yes, then I must remember that next time.

[Chrysalis]

ok I now agree with kitz it wasnt due to ES, they were too low.  I guess adslmax issues setting it up caused lots of failed connections which the dslam seen as disconnections, advice? when buying and configuring a new router, do the configuring before plugging in the dsl cable.

I ordered one now as I think billion do make quality products (used them when was on ukonline) and its not that expensive £60 on amazon.

However seems out of stock everywhere.  Amazon estimate delivery between 1st and 4th week of october and I am hoping I can use bridge mode.

adslmax if this is the first time you interleaved and your line is stable I think DLM will recover within a week.

[kitz]

chrys - he only had about 114 ES overnight and started panicking at about 8.  Thats insufficient to trigger the DLM.

It only takes 1 CRC to trigger an ES, but I too doubt that they will use CRC or FEC.  ES per set interval is far more likely than daily count as we know the DLM monitors in 15 min intervals.   Sync count to trigger the DLM is supposedly 5th when on Stable or 10 for Standard 20 for Speed.  I just wish BToR were more transparent about the DLM triggers.

----
2 new replies whilst making this post and answering my phone but leaving post as was.

[adslmax]

Yes first time interleaved and first time DLM since my first ever FTTC went live last February. I am glad to hear that my line could be revert back to fast path in time within a week or 2 weeks.

Yes, it my fault setting up during DSL on live. I just wish set it up without DSL on. As kitz is right I was panic too much over Billion errors and worry about DLM. So, the DLM win I lose.

[adslmax]

  I just wish BToR were more transparent about the DLM triggers.

Plusnet staff also saying this. But, the good news that plusnet are now working closer with BT to bring the new tool for plusnet to reset DLM in future but there is no date yet as BT still trial it.

[kitz]

Kitz - are you saying when switch off the VDSL2 modem off the main socket leave it off for 30 minutes plus the phone line too (leave it on the socket for 30 minutes) ? If both yes, then I must remember that next time.

As Ive said in earlier posts but I'll repeat again in steps:-

1) Leave the modem cable plugged into the phone socket then switch off the modem/router by its power button.  {this includes the BTOpenreach modem}
2) Wait a few seconds then you can remove modem cable
3) Wait at least 1/2 hr before plugging in new router - in particular plugging in the modem cable for the new router into the phone socket.

The DLM works in 15 min cycles so its got to see at least one full 15 min cycle without any connection - thats why we say 1/2 hr to ensure at least 1 x 15 mins is seen without any connection.

plus the phone line too

Not the PHONE LINE - the MODEM CABLE..  the one that goes from your router to the phone socket.

[roseway]

3 - can it collect full stats via eric's or BE's tools?

Yes, you can see my stats from the 8800NL on MyDSLWebStats.