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I am trying to use systemd-networkd to configure my network. I would like to have a dhcp setting but I must keep the interface from being up. The step scenario would be

  • Machine boot up
  • Network interfaces are down
  • Manual raising of net-interface
  • Requests to dhcp are made.

I have not beeen able to keep interfaces down and dhcp config. I also tried having no config and managing request using dhclient but having multiple interfaces gives me a weird routing-table(this in itself could be another question in the future).

For a bit more information. I have a regular RJ45 network port and several USB modems that I would like to plugin without automatic-connect.

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  • IMHO there is no way to keep ethernet-interfaces down and still do DHCP. Is your goal to keep Ethernet down and configure network via the modems when they are plugged in only? Commented May 31, 2022 at 8:31

2 Answers 2

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Depending on your distro you could add
ONBOOT=no to /etc/sysconfig/network-scripts/your-interface
That way the interface stays down after reboot and can be enabled via:
ifup your-interface

To enable DHCP you can add
BOOTPROTO=dhcp to the same file

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After some help, it turns out one solution that works for me is adding the following to the .network file

[Link] RequiredForOnline=no ActivationPolicy=manual
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