[ovirt-users] Can´t use a VM Network VLAN, because the Virtual Machines inside can't reach the Gateway

[Dan Kenigsberg]

On Tue, Jun 30, 2015 at 03:48:49PM -0500, Julián Tete wrote:
> Hi Friends of oVirt
> 
> I'm trying to migrate my company from VMware to oVirt.

We'd like to help you do this!

> In my final tests, I set up 2 more VLANs in oVirt, (VM VLANs)
> The Virtual Machines in these VLANs, can be reached from the external IPs
> from the net range,
> but from the Virtual machines only can ping the Host with the Bridge and
> itself, can't reach the gateway. ¿?
> 
> I configured a IP Forwarding in the Host with the virtual machine, and
> nothing changes...
> 
> Any idea ? This is the last duty before embrace oVirt in the company.
> 
> Look to the VLAN 100 configuration (My desired VM Network):
> 
> http://postimg.org/image/7hrog0a2n/
> 
> http://postimg.org/image/68b40i1vr/
> 
> http://postimg.org/image/lu6mlshgp/

I must admit that I don't understand your problem yet. When you ping
from inside your guest, where are your packets dropped?

I'd like to point that your "Hosting" network, as most VM networks, is
better off left without an IP address. The benefit of this is better
security (host TCP stack is not accessible from VMs) and less chances of
routing collisions from the host.

So unless you need to use the same network for something other than VM
communication, try to clear its address.

Regards,
Dan.