On Thu, Sep 20, 2012 at 11:54 PM, Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> wrote:
Tony Hain wrote:
where an IPv6 multicast RA allows all the devices to configure based on reception of a single packet.
You miss multicast storm caused by DAD.
This is a long solved issue. First, it already occurs with ARP broadcasts which the AP in principle resends out to everybody else on the wlan. Second, in the hotspot scenarios where this is likely to be a problem (in IPv4 -or- IPv6) it's addressed by the "AP isolation" feature that's getting close to omnipresent even in the low end APs. With this feature enabled, stations are not allowed to talk to each other over the wlan; they can only talk to hosts on the wired side of the lan. The DAD packets are simply never sent to the other stations. In theory there are some problems with this. In practice, it's in wide deployment and has been demonstrated to work just fine. Regards, Bill Herrin -- William D. Herrin ................ herrin@dirtside.com bill@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004