Christopher Palmer <Christopher.Palmer@microsoft.com> wrote: > > What is the probability that a random path between two Internet hosts > will traverse a middlebox that drops or otherwise barfs on fragmented > IPv4 packets? This question is important for large EDNS packets so you'll find some recent practical investigations from the perspective of people interested in DNSSEC. For instance, a couple of presentations from Roland van Rijswijk: https://ripe64.ripe.net/presentations/91-20120418_-_RIPE64_-_Ljubljana_-_DNS... http://toronto45.icann.org/meetings/toronto2012/presentation-dnssec-fragment... Related to this and maybe be of interest is the following blog post <https://www.nlnetlabs.nl/blog/2013/06/04/pmtud4dns/>. jaap