On Wed, 2018-10-24 at 16:40 +0200, Thomas HUMMEL wrote: > On 10/24/2018 04:11 PM, Thomas HUMMEL wrote: > > > > Reapply doesn't seem to have any relevance with modification or > > > persistance. > > > > Yes so now my understanding of reapply is more like "restore" (to > > its > > original settings). Does this make sense even with non disk backed > > applied profiled (I guess that's what you tried to explain to me in > > a > > previous message where you were talking about a clone of the > > profile). > > In fact I don't understand reapply anymore : > > - it doesn't affect the profile
right, the profile is unchanged. > - a nmcli device modify <device> (802-3-ethernet.mtu for instance) > seems > to immediatly (re)apply the change I'm doing to the active profile. > > So, I don't understand anymore when I'm supposed to issue a nmcli > device > <device> reapply ? First of all, device-reapply might not be something that is frequently used. So, you can be perfectly fine, without ever using it. Remember, that a modification of the profile (`nmcli connection modify`) does not take effect immeiately (except "connection.zone" and "connection.metered" properties). You usually need to do a full re- activation for the changes to take effect (`nmcli connection up`). `nmcli device reapply` is mostly like re-activating the profile, however it does not a full re-activation. As such, it may be less disruptive. For example, if your device is a bridge (with vlan devices on top of it), a full `nmcli connection up "$BRIDGE_PROFILE"` needs to destroy all the vlans on top, and unenslave all slaves from the bridge. That's pretty disruptive. `nmcli device reapply` wouldn't. However, you can also reapply certain changes, like an IP address but not a MAC address change. It would simply fail if the changes are too invasive. Yes, it's not unlike `nmcli device modify $DEVICE`. For example, nmcli connection up "$PROFILE" ifname "$DEVICE" nmcli connection modify "$PROFILE" +ipv4.addresses 192.168.77.5/24 nmcli device reapply "$DEVICE" is basically the same as: nmcli connection up "$PROFILE" ifname "$DEVICE" nmcli connection modify "$PROFILE" +ipv4.addresses 192.168.77.5/24 nmcli device modify "$DEVICE" +ipv4.addresses 192.168.77.5/24 best, Thomas
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