In anycast, a collection of servers from around the world share the same IP address. Since packets are routed based on the destination IP, there are multiple valid routes that can get packets to where they need to go, potentially on different servers. Intuition tells us that the shortest route will be selected, and the outcome should be that every video connection will land on the server that is closest to the client. This is a good thing and should ensure the best possible latency.

This approach is ideal for simple protocols where a single packet is needed for both the request and the response. But what about long lived video connections? What happens when the shortest and best path for the packets of a connection changes? The connection breaks, and the client needs to reconnect, reauthenticate and continue where they left off. In this session, we will discuss how using HTTP/3 and QUIC along with XDP and tunneling can be used to overcome this situation at planetary network scale. This talk was presented at Demuxed ’22, a conference for video nerds in San Francisco featuring amazing talks like this one. Demuxed ’22 was made possible by sponsors like our Platinum sponsor Daily (https://daily.co) and organized by people from Mux (https://mux.com). For more information about the conference and community, see https://2022.demuxed.com.