The DSL modem is also a wired and wireless router with DHCP enabled. The modem has its own IP, 192.168.1.1; users can log in and modify some settings.So a simple question: Why install pppoeconf and let us know that, without any information what you did to configure ppp and also what ISP and/or internet connection or DSL modem this is all about?
ISPs use PPPoE quite often as that offers an easy way to handle IPv4 addresses independent of location and HW. But it is run in the modemrouter, your Pi does not need it, it ruins things actually. Unless you bought a DSL modem and want to make the Pi the router.
Also, ifconfig is legacy command, use:
ip link
ip addr
ip route
nmcli
nmtui
etc to setup and modify networking
The DSL modem is ASKEY RTF8207W, the ISP is CHT in Taiwan.
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.
Statistics: Posted by Chris12202 — Fri Aug 15, 2025 1:57 pm