Actually the correct systemd.network attribute is PreferredSource= instead of Source= as shown in this comment https://github.com/systemd/systemd/issues/5888#issuecomment-301565544
Source= is only applicable to ipv6 source-based routing
Actually the correct systemd.network attribute is PreferredSource= instead of Source= as shown in this comment https:/ /github. com/systemd/ systemd/ issues/ 5888#issuecomme nt-301565544
Source= is only applicable to ipv6 source-based routing