At present, service discovery protocols such as Apple's Bonjour only work within a single subnet, as they use link-local multicast messages. In campus networks, it's quite common that devices in the same room (a screen, a printer, even another user's wireless device etc) may be in different networks, and thus not discoverable. In this talk we'll give an overview of the work being done in the IETF dnssd WG on extending DNS-based service discovery to work across disjoint subnets in environments such as campus networks. RFC 7558 has already been published describing the requirements, and work is advancing on defining the hybrid proxy and DNS Push elements of the solution. Where possible, we'll also give pointers to early implementations.