I think what Francis means is that all nodes should know how to process the
routing header. That is, they know the header type and they layout of
the header.
That does not mean that they should process the header whenever they see it.
Processing the header would imply verifying the contents and forwarding if
necessary.
Some implementations took a really simplistic approach and process
routing header every time including forwarding. This is what started the
whole thread. Other implementations took a safer approach an decided that
processing or forwarding is not appropriate under some circumstances
(like when the node is configured as a host).
So as you can see, this whole thread simply a different interpretation of
the specs. It would nice if this issue would be clarified in some
document, but I can live without it.
-vlad
Forwarding is a different issue.
KANDA Mitsuru / $B?@ED(B $B=<(B wrote:
>
> Hello,
>
> At Tue, 11 Sep 2001 10:53:49 +0200,
> Francis Dupont wrote:
> >
> > In your previous mail you wrote:
> >
> > > I think it was quite widely accepted (at least nobody
> > > objected, thus I said "consensus") that _hosts_, at least by
> > > default, should not forward source-routed packets.
> >
> > My understanding of RFC 2460 is that all nodes, meaning both hosts and
> > routers, should process Routing Headers.
> >
> > => two points:
> > - should process is too strong, my feeling is "should implement the
> > processing of Routing Headers"
> > - to process and to forward are two different things (forward is stronger).
> > IMHO the default policy for hosts should be process but not forward.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Do you mean as follows:
>
> Hosts know this extention header is Routing Header, but do nothing (just discard).
>
> regards,
> -mk
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Compaq Computer Corp. Fax: (435) 514-6884
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