On Feb 19, 2008, at 3:39 PM, Brian E Carpenter wrote: > On 2008-02-20 08:34, Marshall Eubanks wrote: > ... > >> Not AFAICT in IPv6 : >> >> rfc2460 : >> >> o Unlike IPv4, when UDP packets are originated by an IPv6 >> node, >> the UDP checksum is not optional. That is, whenever >> originating a UDP packet, an IPv6 node must compute a UDP >> checksum over the packet and the pseudo-header, and, if >> that >> computation yields a result of zero, it must be changed >> to hex >> FFFF for placement in the UDP header. IPv6 receivers must >> discard UDP packets containing a zero checksum, and >> should log >> the error. > > Of course, this decision was taken in parallel with the decision to > drop > the IP header checksum from IPv6. Nobody was quite ready to 100% trust > the link layer.
And the discussion about dropping this in IPv6 is in the context of tunnel encapsulations where the interior packet has a checksum. > > Brian Marshall _______________________________________________ Ietf mailing list Ietf@ietf.org http://www.ietf.org/mailman/listinfo/ietf
