On Sat, 2 Jun 2012, Masataka Ohta wrote: > Existing routers, which was relying on ID uniqueness of atomic > packets, are now broken when they fragment the atomic packets. Such routers were always broken. An atomic packet has DF=0 and any router fragmenting such a packet was and is non-compliant with the relevant specifications (RFCs 791, 1122, 1812). //cmh