Erik Nordmark wrote:
>
> > A copy of the note, admittedly very rough (just an outline, and a very
> > rough one at that) is at:
> >
> > http://www.isi.edu/touch/pubs/hazards-outline.txt
>
> This doesn't list what I thought was an obvious issue.
> If multiple nodes are originating packets with the same source
> IP address it will be rather hard for them to ensure the required
> uniqueness on the IP ID field (unique for the combination
> of source IP, destination IP and protocol).
>
> I suspect that most of boxes that play these games don't worry about
> IP ID which might cause garbage reassembly should the same
> IP ID be used when multiple such boxes are sending to the same IP address.
Good point.
I suspect they ignore the issue because of how they demux to multiple
boxes;
if the demux is by a hash of source IP address, then there's no need for
coordination thereafter.
I'll certainly add that to the list. There's a corrolary at the TCP
level, of port reuse, etc.
Thanks,
Joe
