Ronald Bonica wrote: > The words "many" and "some" don't do justice to the conversation. https://tools.ietf.org/html/draft-ietf-v6ops-ipv6-ehs-in-real-world-02 provides more concrete numbers from real-world observation. Ah, but the result is much simpler. Some other real world data (Google QUIC experiments) already tell us that a sizable part of the Internet (was it 7 %?) is not reachable via UDP at all. This just ups that number slightly for IPv6 and UDP protocols that don't have their own segmentation. UDP, it was nice to have known you. Grüße, Carsten