No Ethernet auto connect / reconnect

[oxoocoffee]

Creating a bug report/issue

• [ x] I have searched the existing open and closed issues

Required Information

• DietPi version | G_DIETPI_VERSION_CORE=9 G_DIETPI_VERSION_SUB=8 G_DIETPI_VERSION_RC=0 G_GITBRANCH='master' G_GITOWNER='MichaIng'
• Distro version | bookworm 0
• Kernel version | Linux rpi-cam-ap 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/Linux
• SBC model | RPi 4 Model B (aarch64) or (EG: RPi3)
• Power supply used | (EG: 5V 1A RAVpower)
• SD card used | (SanDisk Ultra)

Additional Information (if applicable)

• Software title | (ifconfig)
• Was the software title installed freshly or updated/migrated? Fresh
• Can this issue be replicated on a fresh installation of DietPi? Yes
• Bug report ID | d714ba79-6dc9-4de3-9515-fd8e92223326

Steps to reproduce

1. Setup fresh latest DietPi SD card, boot and finish configuration. But do not enable WifI, just LAN port
2. Remove LAN cable and reboot, After network timeout after reboot, login to the unit
3. Plug in the network card
4. run ifconfig or ip address show. The IP address in never assigned from DHCP server.
5. Running sudo ifconfig eth0 down followed ifconfig eth0 up never gets a new address. After full reboot, with linkable is plugged in will get IP address assigned.

Expected behaviour

• If I unplug the cable or of sudo ifconfig eth0 down and change IP address reservation on DHCP server and bring the network up or just plug in the cable, it should get new address.

Actual behaviour

• ...

Extra details

• Nothing happens This is the same case for rpi5 beta latest image of this writing

[MichaIng]

Yes this is expected behaviour, basically the same if a WiFi network is not in rage. Such plug&play for network requires additional tools, like ifplugd for events on Ethernet cable connection: https://packages.debian.org/ifplugd ... oh that one supports WiFi as well, so yeah, the de facto standard on Debian, actually.

I am currently not sure what it does by default, but on our forum you will find some threads where it is used to automatically switch between WiFi and Ethernet, depending on connection/availability: https://dietpi.com/forum/search?q=ifplugd From the configs, maybe you get the idea how just have it configuring eth0 automatically, once a cable is connected, if this is not its default behaviour anyway. Else feel free to ask.