I'm trying to test getting cloudstack 4.1 to build some GRE tunnels between zones. I have two zones and a Xen server in each. I have sdn.ovs.controller set to true and separate physical interfaces configured for management traffic and GRE traffic. When I deploy a VM in each zone I can see interfaces on the VMs called OVSTunnel… So I think it is all working well.
I want to overlay a layer 2 network across a layer 3 network, but just not sure how cloudstack does this. It doesn't seem to be working at the moment. Do I need to create some type of special network service offering to make this happen? The only 'virtual networking' options I see is Nicira and BigSwitch. For it to be layer 2, would I need to have each zone using the same subnet? Or should I assign a second NIC to each VM for the purpose of the GRE? Thanks --
