No, except IP, I did nothing on box setup ... I don't use VLan on my Switchs (just aggregate 2 ports for my NAS)
I really don't understand ... because I do it with all ...
Sure, I forgot something !
I use DHCP from my internet box 192.168.1. (1 to 5) to configure anything (this one took 192.168.1.3)
Then, when it's done, I do MAC address to a fix IP (192.168.1.x not used)
That work all time, that also worked with my Pi4 with Libreelec 11
But unable to change IP on my Pi5 with Libreelec 12
IP change correctly, but Kodi crash after 3 to 15mn, even if I reboot Box, 3 switchs, Pi5
If I remove "MAC adress to another fix IP", Pi5 take 192.168.1.3 and everything is OK in rebooting only Pi5
I thought about IPv6, but it seem deactivated on Pi5/Libreelec
Something changed about network between Libreelec 11 & 12 ? (IPv4/IPv6)
Or maybe something wrong that engage my Loop-Protect on my switchs ?
(expl : Pi5 loop Lan/Wifi ?)(But Wifi deactivated on Pi5 ...)
(I will try to deactivate this Loop-Protect option just to test)