[ovirt-users] subnets

I have a network in place with several subnets, one for iscsi and one for virtual pbx and VoIP phones. I use the iscsi in Ovirt, but I cannot get Ovirt to recognize and use the physical vlan 3 network for phones. If I add it and the subnet, Ovirt will make give it an IP, but it's an isolated network with no connectivity to the other vm's or the Internet. I have read several topics on this but I can't get it to work properly. Any help would be appreciated. Thanks.