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    High Latency

    This is a discussion on High Latency within the Sky Broadband help forums, part of the Sky Broadband help and support category; I have been using Sky BB Unlimited for a year with no problems, but over the last few weeks there ...

    1. #1
      supersneak's Avatar
      supersneak is offline Sky User Member
      Exchange: nsblg
      Broadband ISP: Sky Broadband Unlimited
      Router: Sagemcom 2304n
      Sky TV: Sky+HD box
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      High Latency

      I have been using Sky BB Unlimited for a year with no problems, but over the last few weeks there has been a problem with latency that is making gaming difficult. Sky are sending a new router, but I'm wondering if this could be an exchange problem? I have added a few traceroutes to demonstrate the problem. At least FTTC will be available at the end of September.


      ADSL Link Downstream Upstream
      Connection Speed 10060 kbps 796 kbps
      Line Attenuation 41.0 dB 11.1 dB
      Noise Margin 7.4 dB 16.0 dB


      traceroute to BBC - Homepage (212.58.244.66), 64 hops max, 72 byte packets
      1 myrouter.home (192.168.0.1) 3.762 ms 3.822 ms 1.308 ms
      2 02d9acfe.bb.sky.com (2.217.172.254) 853.757 ms 1023.598 ms 1126.442 ms
      3 10.245.188.97 (10.245.188.97) 1126.746 ms 1119.929 ms 1029.338 ms
      4 ip-84-38-37-126.easynet.co.uk (84.38.37.126) 743.325 ms 995.235 ms 1126.391 ms
      5 ntl-ge2-9.prt0.rbsov.bbc.co.uk (212.58.238.189) 1228.805 ms 1125.919 ms 1022.764 ms
      6 * * *
      7 * * *
      8 ae0.er01.telhc.bbc.co.uk (132.185.254.109) 406.248 ms 55.465 ms 865.083 ms
      9 132.185.255.148 (132.185.255.148) 921.301 ms 1330.622 ms 921.562 ms
      10 bbc-vip111.telhc.bbc.co.uk (212.58.244.66) 44.072 ms 43.662 ms 73.621 ms

      traceroute to BBC - Homepage (212.58.244.66), 64 hops max, 72 byte packets
      1 myrouter.home (192.168.0.1) 2.309 ms 0.916 ms 1.308 ms
      2 02d9acfe.bb.sky.com (2.217.172.254) 1894.511 ms 2070.282 ms 2354.388 ms
      3 10.245.188.97 (10.245.188.97) 2354.280 ms 1944.903 ms 3072.430 ms
      4 ip-84-38-37-126.easynet.co.uk (84.38.37.126) 2047.211 ms 2765.624 ms 2456.130 ms
      5 ntl-ge2-9.prt0.rbsov.bbc.co.uk (212.58.238.189) 2008.452 ms 962.324 ms 112.004 ms
      6 * * *
      7 * * *
      8 ae0.er01.telhc.bbc.co.uk (132.185.254.109) 1008.524 ms 1023.991 ms 1125.906 ms
      9 132.185.255.148 (132.185.255.148) 1127.373 ms 817.620 ms 1433.434 ms
      10 bbc-vip111.telhc.bbc.co.uk (212.58.244.66) 921.638 ms 1762.370 ms 719.127 ms

      traceroute to BBC - Homepage (212.58.246.95), 64 hops max, 72 byte packets
      1 myrouter.home (192.168.0.1) 11.156 ms 3.422 ms 1.721 ms
      2 02d9acfe.bb.sky.com (2.217.172.254) 29.548 ms 26.080 ms 28.298 ms
      3 10.245.188.97 (10.245.188.97) 24.855 ms 23.984 ms 24.137 ms
      4 ip-84-38-37-126.easynet.co.uk (84.38.37.126) 48.494 ms 48.358 ms 44.607 ms
      5 ntl-ge2-9.prt0.rbsov.bbc.co.uk (212.58.238.189) 43.012 ms 46.884 ms 43.272 ms
      6 * * *
      7 ae0.er01.cwwtf.bbc.co.uk (132.185.254.93) 48.504 ms 43.787 ms 45.182 ms
      8 132.185.255.165 (132.185.255.165) 49.488 ms 46.199 ms 44.467 ms
      9 BBC - Homepage (212.58.246.95) 47.471 ms 55.853 ms 45.304 ms

      traceroute to BBC - Homepage (212.58.244.70), 64 hops max, 72 byte packets
      1 myrouter.home (192.168.0.1) 2.752 ms 2.174 ms 3.219 ms
      2 02d9acfe.bb.sky.com (2.217.172.254) 705.443 ms 559.886 ms 600.750 ms
      3 10.245.188.97 (10.245.188.97) 1172.094 ms 817.529 ms 1536.709 ms
      4 89.200.131.187 (89.200.131.187) 1639.443 ms 821.514 ms 1362.389 ms
      5 ntl-ge2-9.prt0.rbsov.bbc.co.uk (212.58.238.189) 681.446 ms 1432.653 ms 1278.574 ms
      6 * * *
      7 * * *
      8 ae0.er01.telhc.bbc.co.uk (132.185.254.109) 1589.424 ms 1430.155 ms 409.328 ms
      9 132.185.255.148 (132.185.255.148) 104.175 ms 552.325 ms 1187.085 ms
      10 bbc-vip115.telhc.bbc.co.uk (212.58.244.70) 1022.694 ms 1432.425 ms 1439.442 ms

      traceroute to BBC - Homepage (212.58.244.70), 64 hops max, 72 byte packets
      1 myrouter.home (192.168.0.1) 2.335 ms 0.919 ms 0.847 ms
      2 02d9acfe.bb.sky.com (2.217.172.254) 1009.248 ms 609.354 ms 1023.426 ms
      3 10.245.188.97 (10.245.188.97) 386.249 ms 23.970 ms 23.245 ms
      4 89.200.131.187 (89.200.131.187) 50.682 ms 71.384 ms 55.795 ms
      5 ntl-ge2-9.prt0.rbsov.bbc.co.uk (212.58.238.189) 42.997 ms 51.834 ms 931.314 ms
      6 * * *
      7 * * *
      8 ae0.er01.telhc.bbc.co.uk (132.185.254.109) 1019.324 ms 921.053 ms 114.892 ms
      9 132.185.255.148 (132.185.255.148) 44.328 ms 46.792 ms 48.892 ms
      10 bbc-vip115.telhc.bbc.co.uk (212.58.244.70) 43.399 ms 42.610 ms 43.110 ms

      traceroute to BBC - Homepage (212.58.246.95), 64 hops max, 72 byte packets
      1 myrouter.home (192.168.0.1) 65.938 ms 0.910 ms 0.835 ms
      2 02d9acfe.bb.sky.com (2.217.172.254) 24.826 ms 29.996 ms 25.618 ms
      3 10.245.188.97 (10.245.188.97) 24.455 ms 35.137 ms 23.126 ms
      4 ip-84-38-37-126.easynet.co.uk (84.38.37.126) 45.072 ms 47.335 ms 48.196 ms
      5 ntl-ge2-9.prt0.rbsov.bbc.co.uk (212.58.238.189) 42.398 ms 43.941 ms 43.113 ms
      6 * * *
      7 ae0.er01.cwwtf.bbc.co.uk (132.185.254.93) 83.245 ms 44.393 ms 45.070 ms
      8 132.185.255.165 (132.185.255.165) 47.002 ms 47.266 ms 45.787 ms
      9 BBC - Homepage (212.58.246.95) 45.286 ms 44.213 ms 43.240 ms


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    3. #2
      tenar's Avatar
      tenar is offline Sky User Member
      Exchange: Newcastle NINE
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      Re: High Latency

      could be issue there on latency in exchange if new router giving same stats as long as tech ticket still open would hope it would be pushed up to NOC network team if still issue although could be other factors when checking router stats is snr always same on up/downstream or any change in attenuation ?

    4. #3
      snadge's Avatar
      snadge is offline Sky User Member
      Exchange: Blaydon
      Broadband ISP: SKY Broadband Unlimited
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      Re: High Latency

      your upstream Line Attenuation looks a little low, its normally about HALF of the downstream one, does this fluctuate when you reboot/resync router? - it may help shed some light on whats happening because me and 1 or 2 others had same problem with upstream attenuation fluctuating, when I had it my performance was fine (including latency) but the NOC team said the Sky ISAM/MSAN in my exchange was running over its capacity at 97.5% and would be upgraded in 6 weeks, I wondered if it was the cause of my fluctuating upstream attenuation figure, if so and yours fluctuates too then it would explain why your getting dodgy latency (because the ISAM is over-loaded and struggles to cope) - just a theory like...
      - Hardware - Netgear DG834Nv1
      - Line Attenuation - 27.5db
      - Sync Rate - 17,600k
      - Noise Margin - 7db
      - Latency - 28ms

     

     

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