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Author Topic: High Interleaving  (Read 4214 times)

j0hn

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Re: High Interleaving
« Reply #15 on: February 06, 2018, 02:14:47 PM »

I'd bet my mortgage that it was the capping of the line.
Your line did almost exactly what mine did, but I never changed modem inbetween.

You had sticky interleaving for months, no sign of G.INP.
You capped the line, interleaving dropped to fastpath.
You uncapped, interleaving returned. Within a short period G.INP was finally applied.

I've been watching this thread with great interest since I recommended the cap to see if it would work for you like it did for me.

My theory on this is that DLM simply gets "stuck". The cap simply gives DLM a nudge. When the profile changes to fastpath DLM wakes up and that line joins the orderly queue for G.INP.
There's a couple similar lines on MyDSLWebStats that I believe would have the exact same outcome if they capped their line to remove interleaving and give DLM a nudge.
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Zyxel VMG1312-B10A bridge mode with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

kitz

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Re: High Interleaving
« Reply #16 on: February 06, 2018, 02:26:43 PM »

:)
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V_R

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Re: High Interleaving
« Reply #17 on: February 06, 2018, 02:34:33 PM »

Nice, hopefully I won't be too far behind you!
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Zen Internet (80/20) on a Huawei 288 cab, via HG612 and an Asus RT-AC86U running Merlin FW.

KingJ

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Re: High Interleaving
« Reply #18 on: February 06, 2018, 03:54:26 PM »

I'd bet my mortgage that it was the capping of the line.
Your line did almost exactly what mine did, but I never changed modem inbetween.

You had sticky interleaving for months, no sign of G.INP.
You capped the line, interleaving dropped to fastpath.
You uncapped, interleaving returned. Within a short period G.INP was finally applied.

I've been watching this thread with great interest since I recommended the cap to see if it would work for you like it did for me.

My theory on this is that DLM simply gets "stuck". The cap simply gives DLM a nudge. When the profile changes to fastpath DLM wakes up and that line joins the orderly queue for G.INP.
There's a couple similar lines on MyDSLWebStats that I believe would have the exact same outcome if they capped their line to remove interleaving and give DLM a nudge.

That logic makes a lot of sense to me. Additionally, the resync today was at roughly the same time (early afternoon) as my resyncs when I applied the cap and when DLM removed the interleaving. Had the modem been the factor, I might have expected DLM to kick in around the time I switched out the modem (late evening).

Nice, hopefully I won't be too far behind you!

Fingers crossed! I've been watching your thread and i'm very interested to see if your connection follows the same pattern my one has!
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mbb

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Re: High Interleaving
« Reply #19 on: February 06, 2018, 05:02:39 PM »

sorry to hijack thought it best i post here instead of a new thread.

 Im on Week 8 of a new line since moving house with no sign of g.inp, interleaved since day 1 with 8ms delay. Id be very interested in capping my line to speed things up a bit/give dlm a nudge but is it possible with a hg612 and custom firmware? Can someone maybe take a look at my stats and see if everything looks ok it would be greatly appreciated  :baby:. having read this thread it seems possible dlm on my line is stuck.  bt fault checker detected a fault on my line 1st week of install. openreach came and fixed it. they were here most of the day and in the end went up the pole and found quite a badly corroded junction box. my modem was flashing orange >blue >orange for around 6 hours  :'( :no:

i do seem to lose connection once a day for around 5 minutes. the modem stays blue but the internet is completely gone and the bt splash page comes up. within a few minutes its back up

mdws username is markb G (the G is from our old house  :'()
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Ixel

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Re: High Interleaving
« Reply #20 on: February 06, 2018, 05:11:48 PM »

sorry to hijack thought it best i post here instead of a new thread.

 Im on Week 8 of a new line since moving house with no sign of g.inp, interleaved since day 1 with 8ms delay. Id be very interested in capping my line to speed things up a bit/give dlm a nudge but is it possible with a hg612 and custom firmware? Can someone maybe take a look at my stats and see if everything looks ok it would be greatly appreciated  :baby:. having read this thread it seems possible dlm on my line is stuck.  bt fault checker detected a fault on my line 1st week of install. openreach came and fixed it. they were here most of the day and in the end went up the pole and found quite a badly corroded junction box. my modem was flashing orange >blue >orange for around 6 hours  :'( :no:

i do seem to lose connection once a day for around 5 minutes. the modem stays blue but the internet is completely gone and the bt splash page comes up. within a few minutes its back up

mdws username is markb G (the G is from our old house  :'()

Regarding applying your own banding/cap... all you need is an unlocked HG612, connect via telnet and run a specific command. See this thread for more information.
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mbb

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Re: High Interleaving
« Reply #21 on: February 06, 2018, 05:35:09 PM »

great stuff and thank you.  i have just read it over and im excited to get it done. but at what speed should i cap my line. im quite far from the cabinet so my sync speed is quite low to begin with. i will post my stats.

Uptime:                    5 days 23 hours 56 min 25 sec
Resyncs:                   0 (since 31 Jan 2018 17:50:52)
         
            Downstream   Upstream
Line attenuation (dB):     23.7      0.0
Signal attenuation (dB):   Not monitored      
Connection speed (kbps):   35469      7150
SNR margin (dB):           5.9      6.1
Power (dBm):               12.3      -0.5
Interleave depth:          695      1
INP:                       3.00      0
G.INP:                     Not enabled      Not enabled
Vectoring status:          5 (VECT_UNCONFIGURED)      
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j0hn

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Re: High Interleaving
« Reply #22 on: February 06, 2018, 07:56:02 PM »

Can you run the command xdslcmd info --stats and post the results. It provides much more info.
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mbb

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Re: High Interleaving
« Reply #23 on: February 06, 2018, 08:20:15 PM »

thank you for the reply. i have already gone ahead and capped the line at 18000 4000 so im unable to provide the old stats now. hopefully this is sufficinet enough. i assume theres some way of seeing them in mdws my username is 'markb'. 1 thing i noticed after the resync and cap is INP has gone from 3 to 3.5

new stats from cap:

# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status:   0
Max:    Upstream rate = 7037 Kbps, Downstream rate = 40444 Kbps
Bearer: 0, Upstream rate = 4000 Kbps, Downstream rate = 17998 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):        16.1            11.6
Attn(dB):        23.7            0.0
Pwr(dBm):        12.4           -0.9
                        VDSL2 framing
                        Bearer 0
MSGc:           42              90
B:              31              110
M:              1               1
T:              64              20
R:              10              16
S:              0.0565          0.8797
L:              5952            1164
D:              577             1
I:              42              128
N:              42              128
                        Counters
                        Bearer 0
OHF:            418340          172415
OHFErr:         0               0
RS:             160572754               1752533
RSCorr:         532             0
RSUnCorr:       0               0

                        Bearer 0
HEC:            0               0
OCD:            0               0
LCD:            0               0
Total Cells:    78624795                0
Data Cells:     3557927         0
Drop Cells:     0
Bit Errors:     0               0

ES:             250             217
SES:            11              0
UAS:            72              72
AS:             2276

                        Bearer 0
INP:            3.50            0.00
INPRein:        0.00            0.00
delay:          8               0
PER:            5.44            13.24
OR:             70.58           57.97
AgR:            18068.84        4058.14

Bitswap:        1868/1869               0/0

Total time = 1 days 2 hours 38 min 5 sec
FEC:            5107646         0
CRC:            4292            279
ES:             250             217
SES:            11              0
UAS:            72              72
LOS:            0               0
LOF:            0               0
LOM:            0               0
Latest 15 minutes time = 8 min 5 sec
FEC:            0               0
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:            414             0
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 = 2 hours 38 min 5 sec
FEC:            116059          0
CRC:            64              4
ES:             7               4
SES:            0               0
UAS:            45              45
LOS:            0               0
LOF:            0               0
LOM:            0               0
Previous 1 day time = 24 hours 0 sec
FEC:            556297          0
CRC:            96              33
ES:             29              30
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Since Link time = 37 min 55 sec
FEC:            532             0
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
#
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j0hn

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Re: High Interleaving
« Reply #24 on: February 06, 2018, 10:09:54 PM »

Thanks. The cap looks more than sufficient and should return the line to fastpath.

Quote
Since Link time = 37 min 55 sec
FEC:            532             0
CRC:            0               0
ES:             0               0

Not much time to go by but FEC's look low enough for that period.

Your upstream isn't interleaved so didn't need capped but it won't do any harm.

The cap can be adjusted at anytime by sending the maxdatarate command again with your new figures.
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mbb

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Re: High Interleaving
« Reply #25 on: February 06, 2018, 11:13:08 PM »

when the line has reverted to fastpath will the dlm return the command to default or will i have to do it manually. the values being 80000 20000 100000 right? should i leave it in sync for some time before lifting the cap or is it best to lift it soon as ive noticed fastpath is enabled.

many thanks. mark
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Ixel

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Re: High Interleaving
« Reply #26 on: February 06, 2018, 11:22:18 PM »

when the line has reverted to fastpath will the dlm return the command to default or will i have to do it manually. the values being 80000 20000 100000 right? should i leave it in sync for some time before lifting the cap or is it best to lift it soon as ive noticed fastpath is enabled.

many thanks. mark

The banding you've applied will remain in place after a re-sync (e.g. DLM intervention). You must either issue another command to change the banding or restart/power cycle the modem. As for the time, I'd leave it a few hours after DLM has intervened at the minimum, or maybe even an entire day to be very safe, but there should be no harm as long as you don't rapidly do consecutive re-syncs or too many within a 24 hour period full stop.
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mbb

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Re: High Interleaving
« Reply #27 on: February 06, 2018, 11:45:43 PM »

ive just realised being on infinty1 would the command be 52000 95000 100000 or would i put 80000 20000 100000 or something else to reset the command /lift the cap

many thanks
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Ixel

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Re: High Interleaving
« Reply #28 on: February 07, 2018, 01:57:37 AM »

ive just realised being on infinty1 would the command be 52000 95000 100000 or would i put 80000 20000 100000 or something else to reset the command /lift the cap

many thanks

80000 20000 100000

This would make it 80/20.
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KingJ

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Re: High Interleaving
« Reply #29 on: February 08, 2018, 01:40:16 PM »

48 hours after DLM intervened to apply G.INP, i've just had another resync that's changed my downstream SNR target to 5dB. As a consequence, sync has gone up by around 4Mbit to 73.8bit, excellent!

Hopefully in another 48 hours, it'll drop to 4dB and give me a little bit more speed.

Since the initial G.INP resync, the line itself has been perfectly stable. I can see on my stats now that G.INP is correcting a few errors through retransmissions and the number of Errored Seconds has remained completely flat at 0.

Very pleased that i've been able to finally get both G.INP and xdB on my line. It's providing a welcome increase in bandwidth and lowered latency. Thanks again for everyone's help.

I'll keep this thread updated if the SNR target decreases again or if I start to see any adverse behaviour.
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