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Author Topic: How long for DLM to recover following Router fault?  (Read 5618 times)

tubaman

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How long for DLM to recover following Router fault?
« on: November 10, 2018, 09:06:26 AM »

My Netgear D6220 appears to have become poorly and has taken some of my line speed with it :(

This started just over a week ago with a call at work from higher management (the wife ;)).  Unfortunately I wasn't at my desk, and by the time I called back she told me that the internet hadn't been working but she had found the router power switch and reset it.
Before she did that apparently all of the router lights were on as usual but no internet and no wireless connections worked.  After the reboot all seemed fine.
All then seemed ok for a few days, but then I started getting intermittent very high ES and SES (thousands!) causing DLM to start upping my 3dB SNR to 4 and then to 5.
As this was intermittent I assumed external factors, as each time I looked at the router stats it appeared to be behaving ok.
Then on Thursday I got home from work and checked the router - ES and SES were clocking up quicker than I could refresh the stats - over 20000 SES by the time I pulled the plug! :no:
I put my trusty old Zyxel 8924 on the line and immediately all calmed down, but unfortunately DLM was upset again and put me to 6dB SNR that night.
I can thus only assume my D6220 has gone bad - I don't really want to put it back on the line to check.

This whole episode has cost me about 6Mb of DS speed which is rather annoying to say the least.

How long is it likely to take for DLM to give me this back, or would I be best phoning in a fault and asking for a DLM reset?
I'd be very reluctant to get a reset if I'm honest as G.INP has given me huge gains on this line and I'd be afraid I might not get it back following a DLM reset.  If that happened I'd be worse off than I am now.  It's a difficult one!

Current stats are below. Unfortunately I didn't capture the fault episodes.

Code: [Select]
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    1
Last initialization procedure status:   0
Max:    Upstream rate = 8101 Kbps, Downstream rate = 41682 Kbps
Bearer: 0, Upstream rate = 8101 Kbps, Downstream rate = 40057 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State:       L0
Mode:                   VDSL2 Annex B
VDSL2 Profile:          Profile 17a
TPS-TC:                 PTM Mode(0x0)
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        6.5             5.6
Attn(dB):        26.6            0.0
Pwr(dBm):        11.9            6.6

                        VDSL2 framing
                        Bearer 0
MSGc:           -6              -6
B:              243             227
M:              1               1
T:              0               0
R:              10              10
S:              0.0000          0.0000
L:              10476           2127
D:              8               4
I:              254             238
N:              254             238
Q:              8               4
V:              0               0
RxQueue:                30              14
TxQueue:                10              7
G.INP Framing:          18              18
G.INP lookback:         10              7
RRC bits:               24              24
                        Bearer 1
MSGc:           90              58
B:              0               0
M:              2               2
T:              2               2
R:              16              16
S:              10.6667         16.0000
L:              24              16
D:              1               1
I:              32              32
N:              32              32
Q:              0               0
V:              0               0
RxQueue:                0               0
TxQueue:                0               0
G.INP Framing:          0               0
G.INP lookback:         0               0
RRC bits:               0               0

                        Counters
                        Bearer 0
OHF:            0               0
OHFErr:         97              0
RS:             2374139752              1138225
RSCorr:         8140612         67653
RSUnCorr:       0               0
                        Bearer 1
OHF:            7195455         934012
OHFErr:         6               0
RS:             43172358                3132070
RSCorr:         99              2506
RSUnCorr:       6               0

                        Retransmit Counters
rtx_tx:         351374371               14743
rtx_c:          49128           25314
rtx_uc:         56164           5264

                        G.INP Counters
LEFTRS:         796             147
minEFTR:        40057           8102
errFreeBits:    105191504               104330384

                        Bearer 0
HEC:            0               0
OCD:            0               0
LCD:            0               0
Total Cells:    312326575               0
Data Cells:     26222450                0
Drop Cells:     0
Bit Errors:     0               0

                        Bearer 1
HEC:            0               0
OCD:            0               0
LCD:            0               0
Total Cells:    0               0
Data Cells:     0               0
Drop Cells:     0
Bit Errors:     0               0

ES:             28              0
SES:            13              0
UAS:            69              58
AS:             115609

                        Bearer 0
INP:            45.00           46.00
INPRein:        0.00            0.00
delay:          0               0
PER:            0.00            0.00
OR:             0.01            0.01
AgR:            40097.60        8118.80

                        Bearer 1
INP:            2.50            4.00
INPRein:        2.50            4.00
delay:          0               0
PER:            16.06           16.06
OR:             47.81           31.87
AgR:            47.81   31.87

Bitswap:        65827/65827             5401/5422

Total time = 1 days 15 hours 53 min 43 sec
FEC:            12183909                81093
CRC:            691             0
ES:             28              0
SES:            13              0
UAS:            69              58
LOS:            1               0
LOF:            6               0
LOM:            0               0
Latest 15 minutes time = 8 min 43 sec
FEC:            7932            313
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Previous 15 minutes time = 15 min 0 sec
FEC:            36113           531
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Latest 1 day time = 15 hours 53 min 43 sec
FEC:            4748736         35744
CRC:            50              0
ES:             6               0
SES:            1               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Previous 1 day time = 24 hours 0 sec
FEC:            7435173         45349
CRC:            641             0
ES:             22              0
SES:            12              0
UAS:            69              58
LOS:            1               0
LOF:            6               0
LOM:            0               0
Since Link time = 1 days 8 hours 6 min 47 sec
FEC:            8140612         67653
CRC:            97              0
ES:             15              0
SES:            2               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
NTR: mipsCntAtNtr=0 ncoCntAtNtr=0
« Last Edit: November 10, 2018, 09:37:19 AM by tubaman »
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tubaman

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Re: How long for DLM to recover following Router fault?
« Reply #1 on: November 10, 2018, 12:49:52 PM »

The 8924 has now just rebooted - might have been the storm that's just gone over that did it, but it was a reboot and not a resync.
Down to 39Mb DS now.
Not having much luck with this at the moment.
 :(
« Last Edit: November 10, 2018, 12:55:51 PM by tubaman »
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kitz

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Re: How long for DLM to recover following Router fault?
« Reply #2 on: November 11, 2018, 09:56:13 AM »

From my own observations:
For a first offence DLM will usually relent after 24-48hr of stability.   2nd offence = 7 days.   3rd offence 10 days.

Not quite sure when its an accumulation of events over a period of time. :/

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tubaman

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Re: How long for DLM to recover following Router fault?
« Reply #3 on: November 11, 2018, 02:09:27 PM »

Kitz,

Thanks - I'll give it a few weeks to see how it goes.
 :)
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tubaman

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Re: How long for DLM to recover following Router fault?
« Reply #4 on: November 23, 2018, 06:19:01 PM »

Kitz,

You were pretty much spot on!
Two nights ago DLM decided I didn't need G.INP on the US any more (don't know why?), and last night it dropped the DS SNR to 5dB.
Hopefully I'll be back at 3dB before too long.

It's a shame about the Netgear D6220 as I really liked it, but I'm not going to chance it back on the line after this episode.  The fact that I've had no further trouble after swapping to the Zyxel makes me quite sure that the Netgear is faulty.
 
:)
« Last Edit: November 23, 2018, 06:24:49 PM by tubaman »
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BT FTTC 55/10 Huawei Cab - Zyxel VMG8924-B10A

kitz

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Re: How long for DLM to recover following Router fault?
« Reply #5 on: November 24, 2018, 10:50:35 AM »

Glad things are returning back to normal.   

Shame about the Netgear. :(   
It could just be that the additional filter in the VMG8924 is making all the difference.   I know for a fact that on my line if I use any other modem than the Zyxel  B10A models then I see a lot more errors and/or lower sync speeds.   
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tubaman

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Re: How long for DLM to recover following Router fault?
« Reply #6 on: November 24, 2018, 11:28:58 AM »

Kitz,

I think it's rather more than the filter as I was seeing tens of thousands of ES on an intermittent basis with the Netgear when it decided to go funny. Before that it did actually perform a bit better than the Zyxel.
I'm just pleased that DLM didn't band me, as I know that's a whole lot harder to get out of.
 :)
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BT FTTC 55/10 Huawei Cab - Zyxel VMG8924-B10A

kitz

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Re: How long for DLM to recover following Router fault?
« Reply #7 on: November 24, 2018, 11:35:54 AM »

Quote
I was seeing tens of thousands of ES on an intermittent basis with the Netgear when it decided to go funny.

:(

Thankfully you didn't get banded.
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Chrysalis

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Re: How long for DLM to recover following Router fault?
« Reply #8 on: November 24, 2018, 11:57:00 AM »

unless you get banded I think a DLM reset is excessive, other forms of action tend to recover quite speedily once a line is consistently stable again.
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tubaman

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Re: How long for DLM to recover following Router fault?
« Reply #9 on: November 25, 2018, 06:20:07 PM »

Chrysalis,
I've not experienced an issue like this before, but after what has happened I tend to agree with you.
I'm still at 5dB SNR but everything is stable and errors low so I hope it won't be too long before DLM gives me back the extra 2dB.
I really didn't want to ask for a DLM reset as that would have taken G.INP off and this line really needs it to perform at its best. I'd have been afraid that I wouldn't get it back.
 :)
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BT FTTC 55/10 Huawei Cab - Zyxel VMG8924-B10A

Chrysalis

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Re: How long for DLM to recover following Router fault?
« Reply #10 on: November 25, 2018, 07:54:08 PM »

yes so a reset may have actually slowed things down as the line would first need to enable g.inp before reducing the target snrm.
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tubaman

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Re: How long for DLM to recover following Router fault?
« Reply #11 on: November 26, 2018, 08:48:00 AM »

yes so a reset may have actually slowed things down as the line would first need to enable g.inp before reducing the target snrm.

On my line that is undoubtedly true. G.INP on its own gives me an extra 6-7Mbps, with each extra 1dB off of the SNR giving 2-3Mbps above that.
It's a brilliant technology, and I think it's very poor that those on ECI cabinets are still not able to benefit from it.
 :)
« Last Edit: November 26, 2018, 08:50:35 AM by tubaman »
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kitz

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Re: How long for DLM to recover following Router fault?
« Reply #12 on: November 26, 2018, 11:33:57 PM »

I so wish OR would say stuffit and just switch it on.   Those modems which were problematic must by now be several years old.   FGS this is now in its 4th year due to incompatible routers, which were probably already getting long in the tooth back then.   :(
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burakkucat

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Re: How long for DLM to recover following Router fault?
« Reply #13 on: November 27, 2018, 12:06:04 AM »

Those modems which were problematic must by now be several years old.

We know that an Asus device was one of the problematic ones . . . but I can't remember the model.

Re-enabling G.Inp on the ECI cabinets would be so simple. I suspect there is reluctance to do so, as CPs would then be receiving complaints from those end-users whose service is degraded by the use of non-compliant CPEs.

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tubaman

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Re: How long for DLM to recover following Router fault?
« Reply #14 on: November 27, 2018, 09:01:59 AM »

kitz, burakkucat,

Quite agree, OR really should have got a grip on this by now.  I seem to remember that one of the original offending CPEs was the Homehub 5 type A, which was rather embarrassing, but I thought that got fixed.
It's really not acceptable that we have such a performance difference that end users have no control over.
Given what I see on my own line with how G.INP transforms it I would be very cross if I was stuck on an ECI cabinet.
Come on OR, get this one sorted once and for all.
 
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BT FTTC 55/10 Huawei Cab - Zyxel VMG8924-B10A
Pages: [1] 2
 

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