I have an odd download problem on my FTTC cct.
I've recently moved from BT to Pulse8 as provider, with fixed ip. At first everything was fine, but during the last couple of weeks, I've noticed downloads, probably mostly via Distrowatch.com web site as notification source, have been stopping part-way (~300MB) through the download. These are linux distribution .iso files mostly.(eg Ubuntu-amd64.iso)ie a large file ~2.5GB. Tried also using wget -c "distro.iso" and this too stopped after a similar amount of download, but was able to restart and finish the download in maybe 6 or 8 sections, stopping every 300-400 MB.
It occurs to me that I've only just started downloading .iso files again now the new Ubuntu is almost here, so perhaps it has been this way since the change-over? I just don't know.
My modem/router is usually a VMG8924-B10A in bridge mode followed by an Edgerouter-X router with ubiquiti AP attached although connection to the computer is via ethernet cable from the router.
However, I'm able to download whole BBC programmes off iplayer, using get-iplayer, without any difficulty. These are a similar size or bigger than the distro files and are downloaded at the maximum speed that my cct will attain, approx 30Mb/s.
Now, I have a thinkbroadband quality monitor set up, which pings my router and records the results as a graph. Result included for enlightenment/explanation. The .iso downloads show massive packet loss - 40-50% - the red lines from the top, whilst the BBC downloads show no packet loss at all. The graph to the right of the thick red 35 minute duration line is using a different modem router - another VMG8924-B10A but in router mode just to see if that changed anything. It didn't!! Conclusion, not my equipment.... Unless you know better?
I also have DSL stats running on a Raspberry Pi, so have the graphs from this too. They show no disconnections occuring - maybe something to do with sampling frequency and only 20-30 sec losses - but DLM doesn't seem to notice any disconnections either. I'm sure it would have complained by now if it had.
When these download disconnections occur using either the browser or wget, my edgerouter dashboard shows that the ip has gone missing on the pppoe line of the display. This reappears some 20-30 secs later and from that time, wget will resume albeit manually.
So, questions:-
Why am i getting these disconnections? Where are they occuring? Are they between the cabinet and me or further back?
Why don't they occur when the source is BBC?
Why the packet loss with wget/browser downloads but not BBC downloads?
Please can someone answer these questions and explain the results I'm seeing?
Terry
Addendum. identification for BBQM graph - left of red barrier - BBC prog download note no packet loss! - Ubuntu Focal Fossa in many bits lots of packet loss - another go at focal fossa but only first part to prove it still didn't work after disconnecting phones at 1700hrs.
- right of red barrier - new modem/router - download BBC Top Gear at 0940 - 1355 download 512MB thinkbroadband test file stopped at 300MB - small 270MB distro Clonzilla downloaded successfully - download DragonflyBSD iso also slow speed 1.3MB/s
Last 2 don't seem to have caused packet loss?? Is it to do with download rate? Or source? Certainly small files <300MB are no problem
I think I can reproduce all of these results, so not a "one time special"
Just watched "El Camino" on netflix no problem, no packet loss.
Sorry for the long read.