Hello CentOS mailinglist I am running CentOS 6.3 with qemu-kvm and libvirt. I was experimenting with bridged VM networking. Usually the VMs run over the network device virbr0. So i created a new bridge with brctl and added my eth0 to that bridge. Not touching virbr0 or it's configuration at all. Then i edited the configuration xml from my VM with 'virsh edit vmname'. After that i decided to restart my server, basically just to 'reset' my network. I know, that's not necessary. But it's easier than risking connection loss and having to get physical access to the server ;)
After the restart my virbr0 network device was gone! cat /var/log/dmesg | grep virbr0 returned nothing. cat /var/log/messages | grep virbr0 brought up nothing aswell.
I tried to reinstall all relevant packages with yum reinstall qemu-kvm python-virtinst virt-top virt-viewer libvirt libvirt-client libvirt-python qemu-kvm-tools
But with no success :(
Does anyone have an idea how to recreate the default virbr0? Is it doable via virsh? I don't have a DE installed on this server, so no virtual-manager. I am willing to go that far if it's worth it though.