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    Important Discovery!

    This is a discussion on Important Discovery! within the Sky Router forums, part of the Sky Broadband help category; I use the Sky Netgear DG834GT router and have had a slow d/l speed for about 8 months, since I ...

    1. #1
      dancingdog777's Avatar
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      Important Discovery!

      I use the Sky Netgear DG834GT router and have had a slow d/l speed for about 8 months, since I had it. It was downloading stuff at about 220 KBs and often slower depending on the time of day and how busy the server was.

      The important discovery though is, when you reset the DG 834GT, it sets the MTU to the default speed of 1500. By accident I set mine to 1492 the other day and now I can d/l at about 700 KBs.

      I tested my find by setting the MTU back to 1500, and sure enough the d/l speed was in the low 200's, then I reset to 1492 and the speed shot up again.

      Check your's now and be suprised. Be very suprised!

      PS Just got shifted from Connect to Mid, though this has no bearing on the speed increase.


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    3. #2
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      Re: Important Discovery!

      PS Just got shifted from Connect to Mid, though this has no bearing on the speed increase.
      If you have moved from Connect to MID, you have just lost any throttling on your connection that was present on the Connect network.

      The MTU thing did nothing for me when I tried ages ago.




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    4. #3
      dancingdog777's Avatar
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      Re: Important Discovery!

      As I said I switched back to 1500 and got the slow speed.
      Maybe you should try it again, it's on the WAN setup tab.

    5. #4
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      Re: Important Discovery!

      If you use the specialist functions on TCP Optimiser, it test your set up to advise the best MTU.

      YOu then need to change the MTU in both Windows and the ROuter to get the best.

      by default the router is 1500 and by chance the best set up for me should also be 1500 according to TCP Optimiser.

      The settings are very much specific to each set up.

    6. #5
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      Re: Important Discovery!

      I tried TCP Optimiser on my previous (2.6 Ghz) computer and it also advised me to use 1500. I don't use it on this computer, in fact I'd forgotten about it.

    7. #6
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      Re: Important Discovery!

      it could well be then that your current PC has 1492 in windows which is why changing the router brought them into sync and the better speed.

      It's not my strong point, so i am guessing a little there.

    8. #7
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      Re: Important Discovery!

      .....Windows. It also works quickly in Linux too.

    9. #8
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      Re: Important Discovery!

      I'm pleased for you that this seems to improve your throughput but it's fairly easy to test Sky's network and see that there is no fragmentation until the MTU is >1500 and so changing it to 1492 shouldn't make any difference (actually it should very slightly decrease your throughput not increase it).

      I think something else must be going on here as packet fragmentation couldn't account for a 3fold change in throughput unless the MTU was massively out.

    10. #9
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      Re: Important Discovery!

      Do these stats (from Mognuts utility) give any answers?
      I just did a test download of 17.64 Mb from the Norton update site Download English Updates
      and the speed during the download started at 500 and climbed to 550.
      *****
      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: INTR, Upstream rate = 416 Kbps, Downstream rate = 5280 Kbps
      Link Power State: L0
      Mode: G.DMT
      Channel: Interleave
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 9.1 13.0
      Attn(dB): 42.0 26.5
      Pwr(dBm): 19.8 0.6
      Max(Kbps): 5888 1184
      Rate (Kbps): 5280 416
      G.dmt framing
      K: 166(0) 14
      R: 16 16
      S: 1 16
      D: 64 8
      ADSL2 framing
      MSGc: 1 1
      B: 166 14
      M: 1 16
      T: 1 1
      R: 16 16
      S: 1.0958 17.0666
      L: 1336 120
      D: 64 8
      Counters
      SF: 400035 400033
      SFErr: 14 0
      RS: 27202414 1700140
      RSCorr: 23489490 12
      RSUnCorr: 220 0

      HEC: 13 0
      OCD: 0 0
      LCD: 0 0
      Total Cells: 84692844 0
      Data Cells: 1846312 0
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 31 0
      SES: 25 0
      UAS: 20 0
      Total time = 1 hours 53 min 48 sec
      SF = 400035
      CRC = 14
      LOS = 38
      LOF = 0
      ES = 31
      Latest 1 day time = 1 hours 53 min 48 sec
      SF = 400035
      CRC = 14
      LOS = 38
      LOF = 0
      ES = 31
      Latest 15 minutes time = 8 min 48 sec
      SF = 31053
      CRC = 3
      LOS = 5
      LOF = 0
      ES = 4
      Previous 15 minutes time = 15 min 0 sec
      SF = 52930
      CRC = 2
      LOS = 4
      LOF = 0
      ES = 4
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 52989
      CRC = 3
      LOS = 8
      LOF = 0
      ES = 7
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 52931
      CRC = 0
      LOS = 1
      LOF = 0
      ES = 1
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 52930
      CRC = 6
      LOS = 6
      LOF = 0
      ES = 8

    11. #10
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      Re: Important Discovery!

      Quote Originally Posted by dancingdog777 View Post
      Do these stats (from Mognuts utility) give any answers?
      There are no obvious problems in your stats other than your sync speed is low for your attenuation. It looks like you may also have been lightly capped but your stats aren't conclusive on this. I think a bit of time spent looking at the faceplate and cabling forum would be helpful to you. What sync speed/noise margin do you get with your test socket (hidden inside your master socket)?

      With regard to your download speeds you may be getting confused between bits and bytes and you're certainly not using reliable methods to test.

      What speed do you get from this site wired.

     

     
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