nanog mailing list archives
Re: IPv6 and multicast listener discovery
From: Baldur Norddahl <baldur.norddahl () gmail com>
Date: Sat, 5 Jun 2021 00:23:19 +0200
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 <bill () herrin us> 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 bill () herrin us https://bill.herrin.us/
Current thread:
- IPv6 and multicast listener discovery William Herrin (Jun 04)
- Re: IPv6 and multicast listener discovery Baldur Norddahl (Jun 04)
- Re: IPv6 and multicast listener discovery Dale W. Carder (Jun 07)
- Re: IPv6 and multicast listener discovery William Herrin (Jun 20)