I have systemd version 219. Citing example 2 from systemd.network: [Match] Name=en* [Network] DHCP=both And above we read: DHCP= Enables DHCPv4 and/or DHCPv6 support. Accepts "yes", "no", "ipv4", or "ipv6". "both" is not listed as a possible value anymore, please change to "yes".
Fixed in http://cgit.freedesktop.org/systemd/systemd/commit/?id=9c8ca3f7a6. ("both" is still accepted for backward compat, but of course the example should be updated.')
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