Tim Chown wrote:
>
> On Tue, 21 Aug 2001, Alex Conta wrote:
>
> > at page 15, in the draft. "(c)" protects the value of the flow label, or
> > rather, its meaning, where it is relevant to protect it.
> >
> > That is because, the value in itself, alone, is not meaningful. It is
> > the meaning of the value, which is important, and as long as that
> > meaning is preserved, the value can change.
>
> But the only way to preserve the meaning - the fact that the combination
> of source address and flow label uniquely identifies the flow because the
> source host guarantees that each flow has a unique label - would be to
> restore the value to the orginal value previous to any munging/tunelling
> in the middle. If you alter the value, where do you store the original
> value?
>
> tim
Nodes that change the value would store information that would help
preserving the meaning.
This could be done for instance by routers in a routing domain. Such
technologies already exist, even though not specifically for IPv6. The
storing of information can be pseudo-manual under the control of an
operator, or dynamic-automated, under the control of some protocol
engine, running
on each router.
S/MIME Cryptographic Signature
