[CentOS] Networking just stopped working

> Are there 'services' that the network 'depends' on, but which are are
> started *later* then network?  Running 'service network restart' as a cure
> suggests this.  Do you have any special or custom init scripts relating
> to your bonding (maybe something that loads special kernel modules or
> something like that)?

Hmm, now that you mention it, I highly suspect the qemu/libvirt network 
but I have already shot down these two services along with dnsmasq. What 
else will setup the 192.168.122.0 space?