@aaisp it's my docsis provider that was unreliable recently. i route my traffic through l2tp and my tunnel rouuter is configured to auto-switch between the docsis provider, and a backup LTE provider. i document my setup here:
https://fedfree.org/docs/router/debian-l2tp-aaisp-redundant.html
however, my docsis provider gave me a usb lte dongle to plug into their router, so i actually have *2* LTE backups. that is what kicked in.
4 days of downtime on docsis. this is unforgivable so i'm switching main internet to more reliable a&a vdsl