On my router I decided to change my rockstor box from DHCP to a fixed IP address (DHCP reservation).
Afterwards, I connected to the box and executed the following 2 commands:
dhclient -r dhclient
Afterwards, I could only connect to the WebUIs of 2 of 6 RockOns: Jellyfin and Pi-Hole.
From the rest of them (Omada Controller, Sonarr, Radarr, Transmission), I have gotten a ERR_CONNECTION_TIMED_OUT error.
A quick reboot fixed it back into shape.
So my question now is: what have I done wrong and what is the correct way to force a DHCP IP renewal?