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    Lots of packet loss

    This is a discussion on Lots of packet loss within the Sky Broadband help forums, part of the Sky Broadband help and support category; In the quest to find the source of my slow download speeds i've been doing some testing this evening to ...

    1. #1
      deano_uk's Avatar
      deano_uk is offline Sky User Member
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      Lots of packet loss

      In the quest to find the source of my slow download speeds i've been doing some testing this evening to try and identify the cause.

      the problem I have is downloads start off at a reasonable speed (1.5MB) and then slow down to a crawl of less than 56kbps.

      I'm on the 8MB Connect package and due to the lenghth of line was told to expect download speeds of around 2.5MB which is about right as my line Syncs at about 3348 with SNR of 7.5.
      The connection is rock solid with not disconnections other than forced ones for the last 7 days.

      Using the pathping command to sites such as google im finding that I get 100% packet loss on 2 of the Sky/Easynet routers as shown below. This could be that the routers are busy and dropping ICMP packets but I'm wondering if they are so overloaded that they are casuing the fluctuating download speeds.

      Computing statistics for 275 seconds...
      Source to Here This Node/Link

      Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
      0 deano-laptop [192.168.0.2]
      0/ 100 = 0% |
      1 1ms 0/ 100 = 0% 0/ 100 = 0% 192.168.0.1
      0/ 100 = 0% |
      2 19ms 1/ 100 = 1% 1/ 100 = 1% dr0.thlon.uk.easynet.net [82.108.0.75]
      0/ 100 = 0% |
      3 19ms 1/ 100 = 1% 1/ 100 = 1% ip-89-200-130-27.ov.easynet.net [89.200.130.27]
      0/ 100 = 0% |
      4 --- 100/ 100 =100% 100/ 100 =100% ip-89-200-132-122.ov.easynet.net [89.200.132.122]
      0/ 100 = 0% |
      5 --- 100/ 100 =100% 100/ 100 =100% ge1-1-0.er3.thlon.uk.easynet.net [89.200.130.2]
      0/ 100 = 0% |
      6 20ms 0/ 100 = 0% 0/ 100 = 0% 195.66.224.125
      0/ 100 = 0% |
      7 32ms 1/ 100 = 1% 1/ 100 = 1% 216.239.49.254
      0/ 100 = 0% |
      8 30ms 0/ 100 = 0% 0/ 100 = 0% 64.233.174.113
      0/ 100 = 0% |
      9 30ms 0/ 100 = 0% 0/ 100 = 0% 72.14.232.239
      0/ 100 = 0% |
      10 35ms 0/ 100 = 0% 0/ 100 = 0% 64.233.174.14
      0/ 100 = 0% |
      11 31ms 0/ 100 = 0% 0/ 100 = 0% 66.102.9.104

      Trace complete.

      Any ideas guys ?? Am I on to something ?


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    3. #2
      Just Cause's Avatar
      Just Cause is offline Sky User Member
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      My stats are worse than yours!

      Computing statistics for 275 seconds...
      Source to Here This Node/Link
      Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
      0 hp [192.168.0.2]
      0/ 100 = 0% |
      1 0ms 0/ 100 = 0% 0/ 100 = 0% 192.168.0.1
      0/ 100 = 0% |
      2 66ms 2/ 100 = 2% 2/ 100 = 2% dr0.thlon.uk.easynet.net [82.108.0
      .75]
      0/ 100 = 0% |
      3 67ms 5/ 100 = 5% 5/ 100 = 5% ip-89-200-130-25.ov.easynet.net [8
      9.200.130.25]
      0/ 100 = 0% |
      4 --- 100/ 100 =100% 100/ 100 =100% ip-89-200-132-122.ov.easynet.net [
      89.200.132.122]
      0/ 100 = 0% |
      5 --- 100/ 100 =100% 100/ 100 =100% ge1-1-0.er3.thlon.uk.easynet.net [
      89.200.130.2]
      0/ 100 = 0% |
      6 68ms 4/ 100 = 4% 4/ 100 = 4% 195.66.224.125
      0/ 100 = 0% |
      7 79ms 0/ 100 = 0% 0/ 100 = 0% 216.239.49.254
      0/ 100 = 0% |
      8 78ms 3/ 100 = 3% 3/ 100 = 3% 72.14.232.233
      0/ 100 = 0% |
      9 77ms 1/ 100 = 1% 1/ 100 = 1% 72.14.232.239
      0/ 100 = 0% |
      10 81ms 1/ 100 = 1% 1/ 100 = 1% 64.233.174.18
      0/ 100 = 0% |
      11 78ms 0/ 100 = 0% 0/ 100 = 0% 66.102.9.104

      Trace complete.

    4. #3
      Plusnet suck's Avatar
      Plusnet suck is offline Sky User Member
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      here are mine

      Computing statistics for 275 seconds...
      Source to Here This Node/Link
      Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
      0 [192.168.0.2]

      0/ 100 = 0% |
      1 0ms 0/ 100 = 0% 0/ 100 = 0% 192.168.0.1
      0/ 100 = 0% |
      2 18ms 0/ 100 = 0% 0/ 100 = 0% dr0.thlon.uk.easynet.net [82.108.0
      .75]
      0/ 100 = 0% |
      3 19ms 0/ 100 = 0% 0/ 100 = 0% ip-89-200-130-27.ov.easynet.net [8
      9.200.130.27]
      0/ 100 = 0% |
      4 --- 100/ 100 =100% 100/ 100 =100% ip-89-200-132-122.ov.easynet.net [
      89.200.132.122]
      0/ 100 = 0% |
      5 --- 100/ 100 =100% 100/ 100 =100% ge1-1-0.er3.thlon.uk.easynet.net [
      89.200.130.2 0/ 100 = 0% |]

      6 19ms 0/ 100 = 0% 0/ 100 = 0% 195.66.224.125
      0/ 100 = 0% |
      7 29ms 0/ 100 = 0% 0/ 100 = 0% 216.239.49.254
      0/ 100 = 0% |
      8 32ms 0/ 100 = 0% 0/ 100 = 0% 72.14.232.233
      0/ 100 = 0% |
      9 30ms 0/ 100 = 0% 0/ 100 = 0% 64.233.174.187
      0/ 100 = 0% |
      10 31ms 0/ 100 = 0% 0/ 100 = 0% 64.233.174.18
      0/ 100 = 0% |
      11 29ms 0/ 100 = 0% 0/ 100 = 0% 66.102.9.104

      Trace complete.

      Looks like those 2 ip's are set not to respond to pings

    5. #4
      NewsreadeR's Avatar
      NewsreadeR is offline Site Founder
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      An explanation I found on the tinternet on packet loss:

      Packet loss on interims hops in a traceroute can have a variety of reasons. The routers on the path normally implement some rate limiting which does not affect packet forwarding *through* the router (ie. application performance), but does effect the traceroute response which from *from* the router. In other instances, the network might not support traceroute responses at all, for example as a protection mechanism.
      In the above cases, it looks like the latter is the case since you consistently get 100% "loss" on the two interims hops but no or very little packet loss further down the line.

      imho these traceroutes may not indicate any problem at all.
      Last edited by NewsreadeR; 12-10-06 at 02:54 AM.




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