Significant Packet Loss popped up out of seemingly nowhere?


  • Banned

    Last night my internet started going crazy with packet loss.

    I started getting emails for gateway alerts, and ended up getting ~4-500 alert emails over <3 hours.

    The internet never went down, just kept getting packet loss, one gateway would go down then come back up, but never all at the same time.

    During this time period nothing I know of happened on the network, and user activity was pretty light.

    Looking through the graphs the only think I can see that looks like it correlates at all to packet loss are states, but I don't know if it's related to the problem, a side-effect or just a fluke?

    Any guesses as to what's going on here and why?
    Is there anything I can do to figure it out and hopefully prevent it from happening again?









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  • This may be completely irrelevant to your situation…

    I experienced a similar problem at home on an 6Mbps ADSL connection and it took me a while to track down the cause. I live in the UK. Broadband ADSL is provided by British Telecom almost nationally and they had changed equipment in the local telephone exchange to support 22Mbps VDSL in my area.

    My neighbour upgraded to VDSL before me and that's when my problems started. I didn't know at the time when I was experiencing packet loss that my neighbour had upgraded. I consulted my provider's tech support and had my line tested by them multiple times but the problem could not be found. After a few weeks I asked my neighbour if he was experiencing packet loss problems and he said he was really pleased with his VDSL upgrade. I asked when he upgraded and it was the same day that my packet loss started.

    My home and three other residences have our copper telephone lines bundled together for some distance before they connect to the street side cabinet where the fibre optic VDSL part of the connection starts. I am guessing that there is some crosstalk between the copper circuits in the bundle at the higher transmission speeds as whenever my neighbour was watching streamed video my connection started losing packets.

    After discussing my theory with my provider, the support technician suggested changing my broadband socket faceplate to the latest design that separates my domestic extension wiring in my house completely from the broadband provision. My original faceplate enabled broadband to be available at every extension outlet in my home. The new one restricts it to the master socket only. Strangely, this new socket type has solved the problem.

    I am disappointed that British Telecom probably know that this is an issue for anyone that uses their old master socket faceplate in a VDSL area but by keeping quiet they don't have to pay to provide the hardware. I paid for my own faceplate upgrade and installed it myself but it is usually provided by the telco when the line is physically installed at the premises.


  • Banned

    I was actually thinking that it might have to do with my ISP/line.

    I just switched from 50/5 to 150/10, have never had problems before.

    This happened two nights in a row at about the same time in the evening for the same period of time.

    So I'm thinking it might be something like you described.

    Do you or anyone else have any idea how I could trace the problem without asking everyone on my street about their internet usage routines?