On Tuesday, July 15, 2003, at 01:59 AM, [EMAIL PROTECTED] wrote:
        we think multicast portion is the most important of all usage, i.e.
        to learn link-local address of peer on a p2p link.  this is the most
        important usage in our debugging situations.
        (i.e. discover neighbor when routing protocol goes mad)

                A -p2p-- B
                  -----> NIQ, Qtype=1 to ff02::1
                  <----- NI reply with source address (fe80::B) and name

another usage is to know the name of the machine which is sending rogue
RA (this happens too many times in conference environment).


                admin           rogue router
                  |               |
                ==+===============+==
                  -----> NIQ, Qtype=1 to ff02::2 (or fe80::rogue)
                  <----- NI reply with source address and name


There are actually 2 different usage of multicast. What you are describing is
multicast when the subject is an IP address. The other case is multicast
when the subject is a name and you're looking for an IP address.
This second case is the one I do not think is that useful.


- Alain.

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