If I’ve hat rouble with Telekom Internet, I order the most fitting Telekom router, set up a little Linux box (mostly Raspberry Pi) and set up two tools

  • smokeping to 3 or more targets (at least one internal and one external plus router), to get a long time overview
  • mtr for more real-time insights on the route, wehen I’ve detected any pattern with smokeping

Mostly I’ve got support from Telekom (business plan) and even got to 3nd Level Support of my private provider.
But this process takes on to 3 Month and a lot of phonecalls (don’t know why the support over email with exact the same content is such a mess, everytime).