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Re: New draft on embedding the RP address in IPv6 multicast address



Gert Doering wrote:
Hi,

On Thu, Oct 10, 2002 at 02:58:10PM -0400, Brian Haberman wrote:

Mike O'Connor wrote:

Is there an underlying assumption that a given group has all of it's
sources in one PIM domain?
     In a previous append, I pointed out that there is still an
open issue with a sender being outside of the PIM domain that
allocated the address.

Just an idea. What about sending a PIM register from the sender's RP to the RP that belongs to the multicast address? It would need another protocol change, of course.
It can lead to a DoS attack on the embedded address.  A bad guy could
embed any address in the multicast address that it wants to attack.
So using register messages would require some type of authentication
mechanism.

Brian