IP Fragmentation - Not reliable over the Internet?

Tue Aug 27 10:04:15 UTC 2013

    Christopher Palmer <Christopher.Palmer at 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_-_DNSSEC_-_UDP_issues.pdf
    http://toronto45.icann.org/meetings/toronto2012/presentation-dnssec-fragmentation-17oct12-en.pdf

Related to this and maybe be of interest is the following blog post
<https://www.nlnetlabs.nl/blog/2013/06/04/pmtud4dns/>.

	jaap