Kitz ADSL Broadband Information
adsl spacer  
Support this site
Home Broadband ISPs Tech Routers Wiki Forum
 
     
   Compare ISP   Rate your ISP
   Glossary   Glossary
 
Please login or register.

Login with username, password and session length
Advanced search  

News:

Author Topic: Cause of random possible DLM reset?  (Read 2087 times)

Ixel

  • Kitizen
  • ****
  • Posts: 1092
Cause of random possible DLM reset?
« on: January 03, 2014, 01:09:00 AM »

Hi all,
Been a while.

I had a rather strange thing happen on my connection, presumably somewhere around the middle of December (I wasn't keeping close tabs on the HG612's connection at the time), where my connection seemed to experience a DLM reset of some kind.

To remind everyone, possibly a year or more ago I managed to 'freeze DLM' into giving me a 60/20 connection with no interleaving (0 INP, 0 delay), and no matter how many times I pulled the plug in and out, it would keep at 60/20 without interleaving and DLM wouldn't intervene.

Well, apart from the apparent DLM reset, I've also noticed my downstream attainable rate has shot up about 4 meg from the usual average I've seen for months, as well as upload attainable going up by a meg or so. Currently INP is 3, a rather low/moderate setting, but I think my statistics in regards to ES, CRC and such are reasonable. Maybe I'm wrong though, so I welcome opinions on my statistics below.

The curious question I have is, does anyone have any idea what may have caused this sudden DLM reset and increase on attainable rates (or so it would seem)?

xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   1
Last initialization procedure status:   0
Max:   Upstream rate = 29165 Kbps, Downstream rate = 98204 Kbps
Bearer:   0, Upstream rate = 20000 Kbps, Downstream rate = 79994 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):    7.4       12.4
Attn(dB):    16.6       0.0
Pwr(dBm):    12.7       6.9
         VDSL2 framing
         Bearer 0
MSGc:      18      150
B:      55      236
M:      1      1
T:      64      5
R:      14      16
S:      0.0223      0.3771
L:      25152      5410
D:      1419      1
I:      70      255
N:      70      255
         Counters
         Bearer 0
OHF:      71000681      1480220
OHFErr:      737      0
RS:      747051474      536653
RSCorr:      3706204      63
RSUnCorr:   22473      0

         Bearer 0
HEC:      5807      0
OCD:      121      0
LCD:      121      0
Total Cells:   3127356232      0
Data Cells:   327086507      0
Drop Cells:   0
Bit Errors:   0      0

ES:      127      2
SES:      10      0
UAS:      62      52
AS:      76177

         Bearer 0
INP:      3.00      0.00
INPRein:   0.00      0.00
delay:      8      0
PER:      1.07      6.15
OR:      178.95      202.87
AgR:      80173.22   20203.27

Bitswap:   58579/58579      6/7

Total time = 1 days 1 hours 45 sec
FEC:      7971161      113
CRC:      8699      2
ES:      127      2
SES:      10      0
UAS:      62      52
LOS:      1      0
LOF:      9      0
LOM:      0      0
Latest 15 minutes time = 45 sec
FEC:      6673      0
CRC:      6      0
ES:      1      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:      48081      0
CRC:      7      0
ES:      1      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 1 day time = 1 hours 45 sec
FEC:      193345      0
CRC:      30      0
ES:      5      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Previous 1 day time = 24 hours 0 sec
FEC:      4056966      80
CRC:      8539      1
ES:      97      1
SES:      10      0
UAS:      36      26
LOS:      1      0
LOF:      9      0
LOM:      0      0
Since Link time = 21 hours 9 min 35 sec
FEC:      3706204      63
CRC:      737      0
ES:      88      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0

xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   1
Last initialization procedure status:   0
Max:   Upstream rate = 29168 Kbps, Downstream rate = 98204 Kbps
Bearer:   0, Upstream rate = 20000 Kbps, Downstream rate = 79994 Kbps

Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (41,857) (1218,1959) (2795,4083)
        VDSL Port Details        Upstream        Downstream
Attainable Net Data Rate:       29168 kbps          98204 kbps
Actual Aggregate Tx Power:          6.9 dBm           12.7 dBm
====================================================================================
   VDSL Band Status      U0      U1      U2      U3      U4      D1      D2      D3
  Line Attenuation(dB):    1.2    19.8    31.0     N/A     N/A    11.4    26.5    41.3   
Signal Attenuation(dB):    1.2    19.7    30.9     N/A     N/A    12.2    26.3    41.3   
      SNR Margin(dB):    11.6    13.1    12.1     N/A     N/A    7.3    7.3    7.3   
       TX Power(dBm):   -3.7   -23.1    6.5     N/A     N/A    8.5    7.3    7.6   
Logged

Ronski

  • Helpful
  • Kitizen
  • *
  • Posts: 3209
Re: Cause of random possible DLM reset?
« Reply #1 on: January 03, 2014, 07:29:32 AM »

No idea what caused it,  but whenever interleaving is applied (you have quite a high level at 1419) the attainable seems to increase higher than it should be.

I had been on fast path for months at 47, with a very similar attainable, now I have interleaving my attainable is about 50.

Logged
Formerly restrained by ECI and ali,  now surfing along at 390/36  ;D

waltergmw

  • Content Team
  • Kitizen
  • *
  • Posts: 2770
Re: Cause of random possible DLM reset?
« Reply #2 on: January 03, 2014, 09:11:41 AM »

Hi Ixel,

You'll see the word bearer has appeared in your data which is probably an indication that your firmware has been auto-upgraded by the BT Agent. I have noted a number of Huawei modems on ECI MSANS that now produce better Sync speeds especially for the lousy services in single Mbps download speeds. The best being a 2+ km D side line increasing from around 0.75 Mbps to 2.74 Mbps.

Kind regards,
Walter

Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1092
Re: Cause of random possible DLM reset?
« Reply #3 on: January 03, 2014, 09:25:18 AM »

No idea what caused it,  but whenever interleaving is applied (you have quite a high level at 1419) the attainable seems to increase higher than it should be.

I had been on fast path for months at 47, with a very similar attainable, now I have interleaving my attainable is about 50.

I see. I've noted that interleaving depth seems to (in some form anyway) link to the sync speed and INP. About two days ago when I first noticed this apparent DLM reset and attainable rate improvement the depth was around 1000 odd with a downstream sync speed capped at around 74000 odd if my memory serves me correctly. With the new firmware I could cap the HG612's sync speed via xdslcmd again to verify that, but I'm pretty sure it is linked in some way.

Hi Ixel,

You'll see the word bearer has appeared in your data which is probably an indication that your firmware has been auto-upgraded by the BT Agent. I have noted a number of Huawei modems on ECI MSANS that now produce better Sync speeds especially for the lousy services in single Mbps download speeds. The best being a 2+ km D side line increasing from around 0.75 Mbps to 2.74 Mbps.

Kind regards,
Walter

I see. I did manually update to the newer firmware originally, one of the ones posted on this forum somewhere, but that was quite a while ago. The only thing I can think of that was in some way related to this apparent DLM reset or DLM being unfrozen could be the series of reboots/power losses I had on the modem about a week ago, during heavy rain downpour. Other than that I'm pretty clueless as to what caused this. Still, it's different. In the past I've noticed this as well, where ECI to ECI produce worse results than HG612 to ECI.
« Last Edit: January 03, 2014, 09:28:04 AM by Ixel »
Logged

Chrysalis

  • Content Team
  • Addicted Kitizen
  • *
  • Posts: 5721
Re: Cause of random possible DLM reset?
« Reply #4 on: January 03, 2014, 03:47:25 PM »

Ixel at a guess it could be the firmware been upgraded on your dslam which in turn caused DLM to unstick itself.
Logged
Sky Fiber Pro - Billion 8800NL bridge & PFSense BOX running PFSense 2.4 - ECI Cab - LINE STATISTICS CLICK HERE

Ixel

  • Kitizen
  • ****
  • Posts: 1092
Re: Cause of random possible DLM reset?
« Reply #5 on: January 03, 2014, 04:17:32 PM »

Ixel at a guess it could be the firmware been upgraded on your dslam which in turn caused DLM to unstick itself.

Ah yes, that could very well be the case, good point. Perhaps that could also explain the increased attainable rates as well. Thanks.
Logged
 

anything