1. A computer-implemented method, comprising: determining, by a local computing device, a first network domain which is to function as a via for a local domain, wherein the via is to route data from other network devices to a predetermined endpoint of the local domain; updating a via-domain description, within a routing-data collection for the local domain, to reference a via-domain description of the first network domain, thereby establishing the first network domain as a via for the local domain; and synchronizing a network-configuration collection, which includes the routing-data collection for the local domain, with at least devices of the first network domain to provide the via-domain description to the first network domain.