OK, so the issue is that before Debian Bookworm dhcpcd was used to configure networking, now it is NetworkManager,The previous Raspberry Pi OS buster doesn't have such an issue; I migrate to bookworm just because my SD card is broken.
Using PPPoE can have a public IP and won't cause the modem problem when you have a lot of connections.
All the commands are listed in bash history; the PPPoE configuration is run by an interactive GUI and only sets the user name and password; the other settings are all default.
I do not know how and if pppoeconf can co-exist with NM. Maybe remove NM and install dhcpcd. Else reed docs etc. Look into the journal, all info is there.
Statistics: Posted by redvli — Fri Aug 15, 2025 7:00 pm