On Thu, Oct 23, 2014 at 12:28 AM, George Herbert <george.herb...@gmail.com> wrote: > > Ok. As a highly on- list-topic example of why distrust is called for... > > Without referring to the systemd source code*, does anyone know what systemd > uses to select between networking subsystems (i.e. NetworkManager, the new > standard as of RHEL 7, vs /etc/ sysconfig/network-scripts/, etc.). > NetworkManager is default but disableable and it magically falls back to > network-scripts dir, but the fallback is nearly undocumented and the > selection behavior appears completely undocumented.
systemctl status NetworkManager.service systemctl status network.service I don't think that there's anything magic about it, you have one or the other enabled. Adding NM_CONTROLLED=yes/no to /etc/sysconfig/network-scripts/ifcfg-* gives you per-interface control over whether NetworkManager or the network scripts are used for managing the interface. If neither is enabled you probably end up with no networking. > If by some chance you do know this, where did you come by that knowledge? > Hopefully with URLs. I have access to systems that run systemd and I tried a couple of things... Also, I've been managing Red Hat systems for a long time and have known about this for a while. But a little bit of googling and I found this: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-NetworkManager_and_the_Network_Scripts.html Unless you're running systemd-networkd, this is really distro-specific stuff as I expect that most distros will want to preserve some backward compatibility with "legacy" network configuration. -- Jeff Ollie
