Hi Ciryl, I tested your systemd-build from https://people.debian.org/~kibi/systemd/
The problem is resolved with your patched version. :-) I urge the package maintainers to introduce this new build really fast into stretch. I could imagine, this affects a whole bunch of people: My ISP hands out unmanageable cable router/modems to it's customers. These devices do not provide a default MTU in their RAs. Therefore I have no chance of handling such a scenario other than patching systemd-networkd. So thanks for getting things right!
