I had a computer with oepnsuse 15.1, I have just upgraded to 15.2 with a DVD image.
It was set to use static IP … and I think already is, but after booting some times it gets the static IP and sometimes it gets a dynamic ip https://susepaste.org/10677039
Inspect your DHCP active and reserved leases for any entries using your client machine’s MAC address. If you see any, remove entries. This might especially be an issue if you’re running network security that integrates DHCP, DNS and Directory Services like Active Directory.
Verify no other machines on your network are configured with the same machine name (should be unique on your network) or using the same MAC address.
Again referring to integrated network security services, I wonder if somehow your pre-upgrade machine data might be stored somewhere and is confused when you login with your upgraded machine info. But, if you’re not running advanced network security and your network services are all separate and simple, this is unlikely.
It happened with the same computer in two different places. I brought the server to my home to work on it and it happened twice or three times, then I switched it off, took it to my office, booted it there and it got again a DHCP address (a different one because is a different range in my office that in my home) that it has got in my home. Then I deleted the interface and create it again with the static IP (but exactly the same configuration as previously), switched it off, switched it on again, fine, static IP ok… but I don’t know if it will last, in fact now I can access the computer from my home but I don’t even think on rebooting it remotely because if it changes the IP then it will be no longer accessible.