Hi.

On Sat, Sep 19, 2020 at 10:03:20AM +0200, Fabien Roucaute wrote:
> Le 19/09/2020 à 08:21, Lucio Crusca a écrit :
> > Il 19/09/20 00:54, Dan Ritter ha scritto:
> >> auto eno1
> >> iface eno1 manual
> >>
> >> auto virbr10
> >> iface virb10 inet static
> >>    bridge_ports eno1
> >>    bridge_stp off
> >>    address 2.4.6.8
> >>    netmask 255.255.255.224
> >>    gateway 2.4.6.1
> >>
> >> the bridge eats the eno1 interface.
> > 
> > Using that configuration it actually brings up eno1 with the correct IP
> > address, but I have no bridge at all:
> > 
> > # ifconfig -a
> > eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
> >         inet 2.4.6.8  netmask 255.255.255.224  broadcast 2.4.6.31
> >         [...]
> > 
> > lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
> >         inet 127.0.0.1  netmask 255.0.0.0
> >         [...]
> > 
> > # brctl show
> > #
> > 
> > I'm puzzled: how does it manage to work if there's no bridge at all?
> > 
> eno1 still has an IP address, try to shut it down and up with 'ifdown
> eno1;ifup eno1' and see if it still have an IP.

It won't do anything since now /etc/network/interfaces does not contain an
IP for eno1.

What's actually needed is

ip addr del dev eno1 2.4.6.8/27

Similar thing needs to be done for the routing table.

Reco

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