[Spce-user] SOLVED: mr13.5.1 [sysemctl] Job for networking.service failed because the control process exited with error code

[Guillem Jover]

Hi!

On Sun, 2025-12-07 at 18:14:14 +0000, SPCE Newbie wrote:
> Steps to reproduce:

> 1.  Fresh install with single dhcp (private) ipv4 network interface
> ...
> 2.  Define currently allocated address as static by editing network.yml

I don't think this is a safe thing to do in general, as you are taking
an address from the dynamically allocated block from the DHCP server.
Usually the DHCP server would have blocks reserved for statically
allocated addresses which you can freely and safely use.

> […]

> Likely root causes:
> 1.  Subsequent change of addressing from dynamic to static, coupled-with
> 2.  Binary /usr/sbin/ifup calling dhclient with now removed -I option

I don't understand this point, as ifupdown in Debian trixie still
passes -I to dhclient, as seen at:

  https://sources.debian.org/src/ifupdown/0.8.44/inet.defn#L100
  (And all other instances in that file.)

And dhclient in Debian trixie still supports the -I option:

  https://sources.debian.org/src/isc-dhcp/4.4.3-P1-8/client/dhclient.c#L562

Thanks,
Guillem