On 2/8/2016 8:08 AM, Alexey Eromenko wrote: > Basically, Fragmentation, as specified in RFC-2460 (IPv6), solves the > problem ONLY for packet-sized between 1280 and 1500 bytes. Which is why > I doubt if it is useful at all. It's exactly what lets encapsulation tunneling occur and reoccur at will. I.e., once you split a 1500 byte packet into 1280 and 220 and encapsulate each of the results, you get to do it again. Without fragmentation, arbitrary recursive direct (IP-in-IP) tunneling is impossible. Joe