 one is SDN network here and the other is data center and we receive service requests from the top from the orchestrator that says I need NAT so I need to connect those two workstations with a NAT in between which is just an example of network service and in the first case that the domain SDN domain here doesn't advertise that it has the capability to run a NAT so the global orchestrator will check and say okay I need to connect those two users that are in this domain but I need to set up a NAT in between so I have to use another domain in order to set up the NAT and basically this is the first part of the demo that is shown here by Gabriele so Gabriele is right now showing that the data center orchestrator has received a NAT okay we can skip the details of the network connections why the other so the SDN domain is as received or we have to refresh the information sorry so the SDN domain has received the basically two tunnels because you know you have to take the traffic from this box to the NAT and from that box to the NAT and those are two different domains so we have to create tunnels between those domains in the next phase of the demo we have another case and this time the SDN domain orchestrator is advertising the capability to execute a NAT so we have now two domains that are able to execute a NAT here and there so when the service request is received by the global orchestrator the global orchestrator has a sort of greedy approach and says okay if the two users are here and I have the possibility to execute the NAT here okay let's install the NAT here and the other domain is no longer involved in the service so basically this is what happens in the second case so right now we have this NAT which connect the two users but now let's look at it it's running in the SDN orchestrator and if we go in the data center orchestrator we see no services so nothing has been deployed on the other domain here so this brings the evidence that if domains are exporting the capabilities and the resources in this message bus in this sort of orchestration space we can set up different services based on the capabilities of the domain which was basically the aim of the demo today