Need some clarification about tenant network in TripleO

Hi, It is a newbie question, but I didn't find a real answer, and I have trouble with my deployment, so some help will be appreciated. In the deployment of TripleO in network isolation, a Tenant network is created, that network (in the examples I have seen) have a VLAN-ID and a subnet. I did the same in my deployment, I created that network. My questions : - Is the Tenant network, mentioned in the deployment process, is it the first tenant network created for the admin tenant? and for new tenant I have to create a new network tenant, despite I am not seeing how I would do that? - Or is it a pipe (a conduit) used to pass the traffic of all the tenants that will be created after? Regards.