[systemd-devel] How to turn off some network interface?

[Rosen, Rami]

Manuel,

Just a short question:
Is the interface you are talking about it configured
to be a DHCP client ?  (if it is so, it can be related to 
networkd DHCP implementation, which may be configured/changed)

Regards,
Rami Rosen
Intel Corporation

-----Original Message-----
From: systemd-devel [mailto:systemd-devel-bounces at lists.freedesktop.org] On Behalf Of Reindl Harald
Sent: Sunday, September 13, 2015 2:41 PM
To: systemd-devel at lists.freedesktop.org
Subject: Re: [systemd-devel] How to turn off some network interface?



Am 13.09.2015 um 13:28 schrieb Rosen, Rami:
> What do you mean by stopping networkd, can you elaborate a bit about what you want to achieve?
>
> If you want to stop the service, simply run "systemctl stop 
> systemd-networkd".
>
> The after that ifconfig command, it won't start.
>
> If you want to disable one network interface (let's say eth0), then go 
> to the proper configuration file under /etc/systemd/networkd and 
> comment/disable it, and restart the networkd service by:
>
> systemctl restart systemd-networkd

well, that's a little unfortune compared to a setup not using systemd-networkd where you can *temporary* disable interfaces just with "ifdown lan4" without changing a configuration

the point is *temporary*, changing the config means it would be disabled at the next boot too, on a machine acting as router/switch temporary disable interfaces makes a lot of sense to disconnect a client from the network

> -----Original Message-----
> From: systemd-devel 
> [mailto:systemd-devel-bounces at lists.freedesktop.org] On Behalf Of 
> Manuel Reimer
> Sent: Sunday, September 13, 2015 11:55 AM
> To: systemd-devel at lists.freedesktop.org
> Subject: [systemd-devel] How to turn off some network interface?
>
> Hello,
>
> it seems to be impossible to just stop networkd (keeps starting itself again).
>
> If I use "ifconfig" to turn off one NIC, then networkd immediately restarts it.
>
> What do I have to do to gain back control over my network interfaces? I want to be able to turn off one interface.
>
> Thanks in advance