Some embodiments provide a method that receives (i) definition of a group of virtual datacenters and (ii) addition of at least two virtual datacenters to the group. Each virtual datacenter is defined in a public cloud and includes a set of network management components and a set of network endpoints connected by a logical network that is managed by the network management components of the virtual datacenter. Based on the definition of the group, the method configures a gateway router to which each of the virtual datacenters of the group connect. The gateway router is for routing traffic between the virtual datacenters of the group. The method also configures, at each respective virtual datacenter, a respective router to route data traffic between the respective virtual datacenter and the other virtual datacenters to route traffic for the other virtual datacenters to the gateway router.