On Thu, 29 Jun 2023 14:50:16 +0000 Alain Knaff <alain.kn...@aev.etat.lu> wrote: > Hi, > > On 28/06/2023 14:01, Alain Knaff wrote: > > Package: dhcpcd > > Version: 9.4.1-22 > > > > Hi, > > > > With the dhcpcd shipped with Debian 12, it is no longer possible to > > bring an interface down and up again: > > > > ifdown eth0 ; sleep 1 ; ifup eth0 > > > [...] > > According to https://github.com/NetworkConfiguration/dhcpcd/issues/159, > > a bug with a similar error message is fixed in dhcpcd-9.5.0 > > > > Actually, further test show that dhcpcd-9.5.1, nor dhcpcd-10.0.1 don't > fix this issue. > > What fixes it, is disabling the dhcpcd service in systemd. This works > even with 9.4.1: interfaces are brought up all right after boot even > without this service, and can be brought down and up again later!
The long description of the 'dhcpcd' package is very clear that it should NOT be installed if interfaces are configured using ifupdown. Purge 'dhcpcd' and only keep 'dhcpcd-base'. Martin-Éric
