If you enable MLD snooping on your switches, the switch will block multicast going out irrelevant ports. The idea is to reduce broadcast in a broadcast domain.
On Fri, Jun 4, 2021 at 11:03 PM William Herrin <[email protected]> wrote: > Howdy, > > Question for those more versed in IPv6 than I: Is there any harm from > dropping ICMPv6 multicast listener discovery reports in a network > which does NOT use any multicast routing (i.e. only uses multicast > which stays within the local link). I see a LOT of idle node chatter > in the form of these reports which, of course, flood every station > since they are themselves multicast. As far as I can tell they are > used only to tell a multicast router whether to repeat a particular > set of multicast packets to the instant link. Which in my network is > -never- because there are no routed multicast packets to be repeated. > > Regards, > Bill Herrin > > -- > William Herrin > [email protected] > https://bill.herrin.us/ >
