Re: [Qemu-discuss] Host-Bridge in routed TAP Mode

[Vlad Yasevich]

On 09/27/2013 08:54 AM, Sven Gehr wrote:
> Am Donnerstag, 26. September 2013, 13:01:06 schrieb Vlad Yasevich:
> > On 09/26/2013 11:46 AM, Sven Gehr wrote:
> > > Am Mittwoch, 25. September 2013, 10:30:15 schrieb Vlad Yasevich:
>
> > > >    From what I understand, routed mode is just that.  It depends
> > > >
> > > > on ip forwarding being enabled for the interfaces and it will
> > > > try to route the packets from your bridge out through your designated
> > > > interface.
> > >
> > > Exactly, all packets from/to the bridging should be routed to the
> > > interface
> > > eth0.
> >
> > For that to happen, eth0 should have an IP address and you need to have
> > proper routes configured.  Also ip forwarding has to be enabled in the
> > interfaces.
>
> ok, then that is my fault. eth0 should not have their own address.
>
>
> [...]
> > > brctl addif intern eth0
>
>
> > > > You can used libvirt to setup a bridged interface in the Network
> > > > Interfaces tab though.
>
> > > I have no graphical interface on the system. What is missing in my
> > > xml-file?
> > I think what you want to do is run:
> >         virsh iface-bridge eth0 br0
>
> ok, I try:
>
> virsh iface-bridge eth0 intern
>
> and get the error:
>
> Error: faild to get interface 'eth0'
> Error: this function is not supportet by the connection driver:
> virtInterfaceLookupByName

What does virsh iface-list show?  If it doesn't show eth0, that
means eth0 is already configured and probably managed by NetworkManager.
Bring eth0 down and see if iface-list shows it.

-vlad

> > You may then edit the xml using iface-edit command.
> ok, note edit the xml-file with an standard editor.
>
> > Then change the vm xml to use the br0 interface instead of the default
> > network you crated.
>
> I have not yet installed vm. That will come later if the bridge works :-)