Re: Changing IP on bridge without disconnecting VMs

[Chris Adams <linux cmadams net>]

Once upon a time, Dan Williams <dcbw redhat com> said:
> On Wed, 2022-07-13 at 07:57 -0500, Chris Adams via networkmanager-list
> wrote:
> > I have my primary ethernet interface configured in a bridge in NM, so
> > that I can run VMs and have them on the local network directly.  I
> > needed to change the IP of the host system, but when I ran "nmcli con
> > up
> > br0", NM removed the VM virtual NICs from the bridge.
> >
> > Is there a way to do this differently so that wouldn't happen?  It's
> > not
> > a common thing of course, but something I have needed to do before.
>
> I think this two step process might work for you:
>
> 1) update the connection to remove the old IP and add the new one, with
> something like:
>
> nmcli con <name> mod +ipv4.addresses <new IP>
> nmcli con <name> mod -ipv4.addresses <old IP>
>
> 2) nmcli dev reapply <bridge interface name>

Ahh, "dev reapply" was the magic thing I didn't know. :)  I've always
done "con up" after making a change, but that does reset more things.
"dev reapply" does not delete all the non-NM bridge members, which is
correct for me.

Thanks!
-- 
Chris Adams <linux cmadams net>