On Tue, 2013-02-12 at 16:29 -0500, Brandon Ross wrote: > It seems that, then, > MLD snooping is valuable as it will prevent DAD and other ND traffic from > using bandwidth towards hosts not in that group.
It will prevent *all* multicast traffic from using bandwidth towards hosts not in the multicast groups involved. ND, DAD etc are just specific cases. > Other than solicited node multicast, is MLD used anywhere else in a > network that does not have layer 3 multicast enabled on a router? MLD is used for all multicast - so a DHCPv6 packet, for example, will only go to any relays and servers in the subnet. *Any* multicast will be limited to its listeners. The only multicast that will go to all nodes will be multicast sent to the "all link-local nodes" address - and even that will not go to non-IPv6 nodes. MLD snooping happens on switches - you will get the benefit even if in an isolated network (no router at all). Regards, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (ka...@biplane.com.au) http://www.biplane.com.au/kauer http://www.biplane.com.au/blog GPG fingerprint: B862 FB15 FE96 4961 BC62 1A40 6239 1208 9865 5F9A Old fingerprint: AE1D 4868 6420 AD9A A698 5251 1699 7B78 4EEE 6017
