[ovirt-users] EXTNET Hook and Libvirtd "Default" Network Setup

[Andrew Wagner]

All,

I'm testing out oVirt for one of our projects that wants to try an 
all-in-one setup before going to a larger deployment. For their testing, 
they want to use the default NAT'd network from libvirtd on the host.

I've install oVirt, installed the extnet hook, enabled IP forwarding in 
sysctl.conf and loaded the setting, and created a vm that attaches to 
the libvirtd "default" network and gets an IP. The VM can ssh to the 
virbr0 IP address, in this case 192.168.122.1, to access the host. 
However, the VM cannot reach any IP address off of the NAT'd subnet. I 
haven't changed any of the default iptables rules that oVirt and 
libvirtd create. Looking at ip route and the iptables rules, I feel that 
traffic should be getting directed appropriately.

Does anyone have any thoughts as to what the issue may be? For some 
reason, the ovirtmgmt bridge doesn't seem to be receiving or allowing 
traffic from virbr0 to pass across it. I can provide more information if 
that would be helpful!

Andrew Wagner