On Fri, 02 Oct 2009 16:49:27 +0200
Alexandru Petrescu <alexandru.petre...@gmail.com> wrote:
> Vijayrajan ranganathan a écrit :
> > Hi,
> > Perhaps a naive question, but can somebody mention some practical use
> > cases for advertising multiple prefixes in a Router Advertisement?
>
> Let me give some more reasons which are non-standard. One could qualify
> them as research.
>
> I put several prefixes in a single RA. RAs are exchanged by routers as
> they'd exchange routes with a dynamic routing protocol. This is done in
> order to propagate routes. It's not the main objective of RAs, but
> works ok. Well, partially.
>
What OS/environment are you using?
The reason I ask is because I've got a slightly odd scenario where
having a router listen to RAs (in my specific case, it's own RAs,
containing a 6to4 address derived from a dynamic IPv4 address
configured via PPP) and configure it's interface addresses from it would
be useful, but as far as I know if an interface is designated as a
forwarding interface, RAs are ignored.
I've forgotten the exact operational details, however Appletalk
supported routers announcing network numbers to each other
("cable-ranges"), and having the receiving router automatically
configure it's addresses. I seem to remember that the receiving router
might even automatically announce that learned prefix into the the IGP.
Regards,
Mark.
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