On Tue, Jul 28, 2009 at 4:30 AM, Christopher Morrow<morrowc.li...@gmail.com> wrote: > (hopefully this time gmail selects the right outbound from addr grr) > > On Tue, Jul 28, 2009 at 4:24 AM, <sth...@nethelp.no> wrote: >>> Out of curiosity, what's the signal back to the sender that his/her >>> packet was dropped?? NFS (in some implementations) doesn't checksum >>> UDP packets, DNS doesn't, there are quite a few things that don't >>> checksum UDP packets. >> >> I believe this is normally a function of the operating system, not >> NFS, DNS etc. Hopefully old SunOS versions that had UDP checksums > > sure, but still how does the application and user know that their > 'thing they are doing' is broken, why it's broken and how to fix it? > Keep in mind that today this all works and users don't have to > understand 'checksum' or 'udp' or 'ip version'... tomorrow something > (hopefully) seemless will happen and their 'thing they are doing' will > just keep on working. > > Spurious failures as would be happen in this proposal will be > problematic, and will (again) cause hesitance in deployments. > >> off by default are dead by now. > > linux nfs doesn't do (nor does netapp apparently) checksums on udp nfs > today (current 2.6 linux kernel, ubuntu 8.x)
apologies, I had a tcpdump expr fail :( I do see DNS though with out checksums, I'll go dig for some more NFS or other UDP on my test host(s). -chris -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
