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    Constant Connection drops every night!

    This is a discussion on Constant Connection drops every night! within the Sky Broadband help forums, part of the Sky Broadband help and support category; hi there.. so ive had zero to no problems what so ever with my sky broadband.. however as of recently ...

    1. #1
      Rokugan's Avatar
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      Angry Constant Connection drops every night!

      hi there.. so ive had zero to no problems what so ever with my sky broadband.. however as of recently (3 days ago) my connection has been randomly dropping every night at around the same time.

      the connection always drops at around 1:00AM > 3:00AM in the morning.. here are logs of the most recent Dc'ing

      May 28 02:08:32 syslog: Line 0: ADSL link down
      May 28 02:08:33 syslog: Line 0: xDSL G.994 training
      May 28 02:08:34 syslog: Clear IP addresses. PPP connection DOWN.
      May 28 02:08:50 syslog: Line 0: ADSL G.992 started
      May 28 02:08:54 syslog: Line 0: ADSL G.992 channel analysis
      May 28 02:09:00 syslog: Line 0: ADSL G.992 message exchange
      May 28 02:09:01 syslog: Line 0: ADSL link up, Bearer 0, us=1278, ds=15356
      May 28 02:09:01 syslog: Line 0: ADSL link up, Bearer 1, us=0, ds=0
      May 28 02:09:06 syslog: PPP LCP UP.
      May 28 02:09:07 syslog: WAN link UP.
      May 28 02:09:07 syslog: Received valid IP address from server. Connection UP.
      May 28 02:09:11 syslog: Connection Up. SNO/MAC/IP/SWVER: [A010139B016347/7C4CA5A13CC0/-IP-REMOVED-/-IP-REMOVED-]
      May 28 02:09:11 syslog: Send out NTP request to ntp1.isp.sky.com
      May 28 02:09:12 syslog: Received NTP Sync Reply from ntp1.isp.sky.com
      May 28 02:09:12 syslog: System time is up to date

      ive removed the IP for security concerns off course!

      the connection drops for at best 1-2 minutes and never any longer! but still very annoying considering this always happens around the same time im watching my youtube playlist etc. and never (at least not to my knowlegde) when im playing games or something...

      i still remain connected through steam... i dont go offline or anything like that and my connection still shows that its fine in the taskbar!

      it just randomly happens on chrome for some unknown reason!

      any ideas on how to fix this ?
      Last edited by Rokugan; 28-05-15 at 04:41 AM.


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    3. #2
      gymno's Avatar
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      Re: Constant Connection drops every night!

      Hi Rokugan.

      If the connection is dropping only once each night, it's possible that sky's DLM system is currently retraining the line in order to achieve the best possible speeds & latency.
      If training is in progress there should (after 3 days) be a notification in the 'my broadband' area of the mysky section at sky.com.

      Have your router stats significantly changed recently?
      How To Get Your Sky Hub SR101 Router Statistics

    4. #3
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      Re: Constant Connection drops every night!

      Quote Originally Posted by gymno View Post
      Hi Rokugan.

      If the connection is dropping only once each night, it's possible that sky's DLM system is currently retraining the line in order to achieve the best possible speeds & latency.
      If training is in progress there should (after 3 days) be a notification in the 'my broadband' area of the mysky section at sky.com.

      Have your router stats significantly changed recently?
      How To Get Your Sky Hub SR101 Router Statistics
      got pretty much the same reply on the sky forums as well! tho he never mentioned if i should check my speed



      id say roughly 100MB's more downstream and nothing else on upstream

      also nothing appeared as of yet in my broadband section!

    5. #4
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      Re: Constant Connection drops every night!

      Quote Originally Posted by Rokugan
      also nothing appeared as of yet in my broadband section!
      I've just had a look in my own broadband section & they've changed the page layout.
      I can't find the report stating my last DLM result now either.

      If it is just one drop out each night at exactly the same time then it is likely to be DLM fine tuning the line.

      Can you post your router stats please.
      They're unlikely to reveal anything now but will serve as a benchmark & may indicate whether DLM is in training mode or not over the coming days.
      Also, take a note of the system uptime from the stats page.
      Unlike all the other stats this shouldn't be resettling to zero each night.

    6. #5
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      Re: Constant Connection drops every night!

      Quote Originally Posted by gymno View Post
      I've just had a look in my own broadband section & they've changed the page layout.
      I can't find the report stating my last DLM result now either.
      Hope they have not removed when your line is undergoing dlm, was always nice to see that in mysky.

      Looks like dlm happening to me, so best not to reboot your router manually. The word training is a clue.

    7. #6
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      Re: Constant Connection drops every night!

      Quote Originally Posted by lettice View Post
      Hope they have not removed when your line is undergoing dlm, was always nice to see that in mysky.
      And more importantly the result!
      The last time DLM trained my line i ended up with over 22Mbps downstream whereas the original estimate was only 11.2 - 18Mbps.

      I did see / click a link on my travels throughout mysky today.
      It was in the trouble-shooting area & titled something like 'To see if your line is currently undergoing testing click here' but it just took me to the 'my broadband' page which now only shows the original estimate given at sign up.

      Quote Originally Posted by lettice View Post
      Looks like dlm happening to me, so best not to reboot your router manually. The word training is a clue.
      Yes, definitely do not reboot the router Rokugan.

    8. #7
      Rokugan's Avatar
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      Re: Constant Connection drops every night!

      Quote Originally Posted by gymno View Post
      I've just had a look in my own broadband section & they've changed the page layout.
      I can't find the report stating my last DLM result now either.

      If it is just one drop out each night at exactly the same time then it is likely to be DLM fine tuning the line.

      Can you post your router stats please.
      They're unlikely to reveal anything now but will serve as a benchmark & may indicate whether DLM is in training mode or not over the coming days.
      Also, take a note of the system uptime from the stats page.
      Unlike all the other stats this shouldn't be resettling to zero each night.
      it drops out roughly the same night.. all the info i said in my OP..

      system stats as of now are.
      Broadband Link Downstream Upstream
      Connection Speed 15356 kbps 1313 kbps
      Line Attenuation 32.0 dB 18.9 dB
      Noise Margin 3.4 dB 4.4 dB

      however downstream noise margin was at around 6.1 dB at the moment of the connection dropping and line attenuation is far far higher for some unknown reason in both areas. downstream more than upstream.

      system up time is 230:03:39 as of this posting

      Quote Originally Posted by gymno View Post
      Yes, definitely do not reboot the router Rokugan.
      i dunno why i would do such a thing as there is no need for me to reboot my router.... im still connected to the internet just the connection drops randomly early in the morning.. im still connected through teamspeak and steam for example... i dont get DC'ed there. just when im on a browser!

    9. #8
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      Re: Constant Connection drops every night!

      Everything you posted there indicates that DLM is most probably training the line.

      Apart from one thing:
      Quote Originally Posted by Rokugan
      line attenuation is far far higher for some unknown reason in both areas. downstream more than upstream.
      Line attenuation figures are dependant on both length & quality of a copper line & therefore should never change by more than 1dB or so unless a fault is present.

      Your downstream speed of 15356Kbps is bang-on standard for a 32dB attenuation @ 3dB margin.
      If do you monitor your speeds & they haven't dropped lately, then TBH it's hard to imagine that the attenuation figures could have risen significantly.

      DLM often tries switching from a target margin of 6dB to 3dB at resync in order to squeeze out a bit more speed, although if too many errors are detected it'll put it back to 6dB at a subsequent resync.
      Being a gamer have you noticed better ping times?
      DLM has been known to put some ADSL lines on fastpath.

      Regarding reboots, i didn't mean to be patronising.
      It's just that rebooting the router during training can cause it to stall & getting sky to start DLM again isn't always easy.
      Last edited by gymno; 28-05-15 at 09:38 PM.

    10. #9
      Rokugan's Avatar
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      Re: Constant Connection drops every night!

      Quote Originally Posted by gymno View Post
      Everything you posted there indicates that DLM is most probably training the line.

      Apart from one thing:

      Line attenuation figures are dependant on both length & quality of a copper line & therefore should never change by more than 1dB or so unless a fault is present.

      Your downstream speed of 15356Kbps is bang-on standard for a 32dB attenuation @ 3dB margin.
      If do you monitor your speeds & they haven't dropped lately, then TBH it's hard to imagine that the attenuation figures could have risen significantly.

      DLM often tries switching from a target margin of 6dB to 3dB at resync in order to squeeze out a bit more speed, although if too many errors are detected it'll put it back to 6dB at a subsequent resync.
      Being a gamer have you noticed better ping times?
      DLM has been known to put some ADSL lines on fastpath.

      Regarding reboots, i didn't mean to be patronising.
      It's just that rebooting the router during training can cause it to stall & getting sky to start DLM again isn't always easy.
      yeah i was not saying it in a bad way or anything... im just saying there was no need for me to reboot the router cause i had not been DC'ed from the internet.. so it was justa quick 1-2min waiting game really!

    11. #10
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      Re: Constant Connection drops every night!

      yep just done it again right now!

      how long is this DLM testing going to keep going on for now... been happening every single day for like the past 5 days at best

     

     
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