$ sudo env SYSTEMD_LOG_LEVEL=debug /lib/systemd/systemd-networkd [...] DHCP CLIENT (0x...): received lease lacks address, server address or lease lifetime, ignoring
$ sudo env SYSTEMD_ LOG_LEVEL= debug /lib/systemd/ systemd- networkd
[...]
DHCP CLIENT (0x...): received lease lacks address, server address or lease lifetime, ignoring