Architecture that facilitates communications between two network nodes of the different networks by providing a routing mechanism that uses alternative modalities driven entirely by policies that are authored and stored in a computing cloud and enforced on the client. This allows the selection of one network path over another path based on criteria such as, physical location of the hosts and service level agreements (SLAs) to be provided, for example. With respect for path selection, a packet can be routed through a datacenter closest to the hosts. With respect to SLAs, there may be different SLAs available to different clients. For clients with the highest bandwidth/uptime or other guarantees, a network path different from other types of clients can be selected. Additionally, connectivity can be allowed or disallowed based on other kinds of policy rules such as a virtual circle to which the hosts may belong.