Karl Auer wrote:
BTW, I'm assuming here that by "multicast filtering" you mean "switching that properly snoops on MLD and sends multicast packets only to the correct listeners".
Errrrr, do you want to say MLD noise is not a problem?
On this point I think you are wrong. Except for router advertisements, most NDP packets are sent to a solicited node multicast address, and so do NOT go to all nodes. It is "the same as broadcast" only in a network with switches that do not do MLD snooping.
But, MLD packets must go to all routers.
So I'm not sure how DAD traffic would exceed ARP traffic.
I wouldn't expect it to.
Nor would I - which was the point of my response to an original poster who said it might.
For the original poster, : I've seen links with up to 15k devices where ARP represented : a significant part of the link usage, but most weren't (yet) IPv6. MLD noise around a router is as bad as ARP/ND noise. That's how IPv6 along with SLAAC is totally broken. Masataka Ohta