[libvirt] networking problem

Daniel P. Berrange berrange at redhat.com
Thu Nov 2 09:31:35 UTC 2017


On Thu, Nov 02, 2017 at 09:24:22AM +0000, Stefan Hajnoczi wrote:
> On Sun, Oct 29, 2017 at 04:07:09AM -0700, msliu at reynoldstocks.com wrote:
> > I have performed following steps:
> > 
> > $ virsh net-destroy default
> > $ virsh net-undefine default
> > 
> > Now I couldn't start guest with following warning popup:
> > Error starting domain: Network not found: no network with matching name
> > 'default'
> > 
> > Please advise how to re-create 'default' instead of reinstalling all
> > guests.
> 
> This is a libvirt question.  I have CCed the libvirt mailing list so you
> can continue discussion there.
> 
> On Red Hat-based distros try reinstalling the
> libvirt-daemon-config-network package.  On Debian-based distros try
> reinstalling the libvirt-daemon-system package.  This should restore the
> /etc/libvirt/qemu/networks/default.xml file that you are missing.

No need to re-install those RPMs - Libvirt leaves a copy of the stock XML
file at /usr/share/libvirt/networks/default.xml.  So just run

  virsh define /usr/share/libvirt/networks/default.xml
  virsh start default


Regards,
Daniel
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