Okay, here are my use cases: 1) I have a dlan network with a different gateway 2) I have a vpn server, that runs independent from default gateway. The easiest way to setup such things is an additional static route - both are completely independent from DHCP setting, and should not interfere with it. Sure, I can use dhcp settings nowadays, but this setup is working since way more than 10 years using various suse distributions, and I cannot see a reason for the necessity to break it.