Apparent significant packet loss

I understand that the Fritz 7530 router Zen provides throttles pings, so it's probably not the best to provide links to the Broadband monitor tool, I do get a constant 40% packet loss though which sounds higher than the other threads but I digress.

About 3 1/2 maybe 4 weeks ago I started getting webpages not loading fully, my work VPN cuts out on a regular basis and technical support has not gone very far. I have had an OpenReach Engineer come out to inspect the line and they replaced a few connections which bumped my max speed up but has not stopped the packet loss. It almost feels like Zen is throttling me or QoS has gone wrong somewhere.

I have a Pi wired directly to the router and running a curl loop to figure out with a 5 second delay on the Google doodle image, or an Amazon page, or any other internet resource shows the same results as below (yes, those are in seconds), while my 4G gets the same 50 Meg down and its a constant 0.2s download for the Google doodle:

Thu 1 Jun 08:51:30 BST 2023
27.24s
Thu 1 Jun 08:52:02 BST 2023
114.03s
Thu 1 Jun 08:54:01 BST 2023
0.07s
Thu 1 Jun 08:54:06 BST 2023
6.73s
Thu 1 Jun 08:54:18 BST 2023
3.30s
Thu 1 Jun 08:54:26 BST 2023
0.07s
Thu 1 Jun 08:54:32 BST 2023
90.57s
Thu 1 Jun 08:54:37 BST 2023
1.62s
Thu 1 Jun 08:54:42 BST 2023
36.79s

Does anyone know if a reverse Broadband quality monitor I can put on a Pi that Zen would acknowledge the details of, as they seem to only be able to respond with "did you make sure it is connected via wire to the router" if I ever forget to explicitly state it and my tethering won't be able to support my work VPN much longer.

If you have IPv6 enabled then set up a BQM to your Pi, that eliminates the vagaries of the Fritz router.

It's possible with your curl script that the websites are throttling you if you are continually reloading the same link so may not be very reliable. You could try running MTR on your Pi (or winMTR on a windows machine) which will give a good indication of the basic connectivity along with some potentially useful statistics.

My first check when I have throughput issues is to reboot the router which usually fixes it, but I assume you have probably done that several timesIf you haven't already done so then check all your ethernet cables - someone else recently was having major problems and it ended up being the down to the cable between the ONT and router..

I'll go ahead and see if I can get the IP6 routing working, as that could work.

> It's possible with your curl script that the websites are throttling you if you are continually reloading the same link so may not be very reliable.

While I agree with your position, tethering doesn't give any issues while my curl was just to demonstrate a point that I am seeing as I have issues with my work VPN cutting out due to latency and timeouts, the kids are unable to access Netflix because only parts come up, and it took 3 refreshes to get the whole of this forum page. But this is why I wanted an example app for testing the outbound because no one seems to believe me, and after 4 weeks I'm considering my options.

I have replaced the router, I was using the old ZyXel that they had given me a couple of years ago and assumed it was giving up the ghost but I'm still seeing it with new cables on the Fritz, and tested with multiple network cables.

I'll take a look at MTR, and see whether that can give me any information I can give to Zen.

Check your Zen control panel, see if the onset of your issues coincides with Zen doing anything to your account, like migrating you to their "next generation" own network. That nice has coincided with performance dirt dives for many. It would appear as a migration order in your account

I don't see any orders like that. The last one I had was back in February and was the:

Residential Copper to Fibre Regrade

As far as I can tell just means I get charged the same but don't have a phone number.

So little success, I had an OpenReach engineer come out on Wednesday and replaced a few connections, which made my max speed 70 MBit. Still with mostly non-functioning internet, and a follow up today who could see a stable sync but packet loss, a "lift and shift" hasn't helped either.

But after complaining about it, I assume I had a level 2/3 engineer call me up who told me that they can see around 40% packet loss, and then dips to 100% loss. On the one hand, I feel a little vindicated, on the other if they are able to see data loss and they put this packet monitor on about 3 weeks ago, why have I been talking with technicians who keep asking whether I have tested with an ethernet cable?

Previously I have been generally happy enough with Zen, but I guess I also haven't actually had any real technical difficulties with them.