How to track the appearance of broken packets to the provider?

Question

Computer networks

I haven't been able to get online for a few days now. During the day, the Internet appears several times only for short periods of time. I managed to call a repairman from the provider. He checked how the cable was crimped and, in case of emergency, re-compressed it again. Checked for any breaks. A verdict was issued that the port on the switch, which is in the garage of the neighbors, was out of order, but the neighbors had to wait several days. Today, finally, the repairmen were able to plug the cable into another port, but the Internet also disappeared after a few hours. When I called the provider's TP, they told me that a lot of broken packets are coming from me and that's why the Internet does not work. I just can't figure out where they come from. The twisted pair from the switch is plugged into the TP-Link TL-WR841ND router. 2 stationary phones are connected to it via cable and a laptop via wifi. All on windows. I tried to connect them directly one by one with a twisted pair, but the Internet behaved the same on all.
Advise how to track the appearance of broken packages? I asked the provider to send me a few lines from the logs about broken packets, but so far no news. If they do, I'll post it here.

Answer 1

Take out the brain to the provider so that he first checks the packets from you to the router in the garage.
after the packets from the router to the provider. and further, in 95% percent, the replacement of the router or fuss on the route will follow

Answer 2

When I called the provider's TP, they told me that a lot of broken packets are coming from me and that's why the Internet does not work.

There is an assumption that not packets, but ethernet frames, and they remove diagnostics from the switch port (check if possible). Ask them what the switch port settings are (speed, 1Gbps/100Mbps/auto-sensing; duplex, full, or auto-sensing). Try to hardcode the data rate to 100Mbps on the laptop/router port connected to the switch yourself.

Answer 3

Download Wireshark it uses colors to identify traffic types black all black is errors