nanog mailing list archives
Re: IPv6 and multicast listener discovery
From: "Dale W. Carder" <dwcarder () es net>
Date: Mon, 7 Jun 2021 11:34:07 -0500
Are your links or hosts limited in some way or broadcast domains of some unreasonable size? Most of the competent switching or managed wireless products will snoop or otherwise handle this overhead in a sane manner. Otherwise this at best would seem to be an over-optimization.
From my days on a giant campus network the current pps rate of MLD
chatter was much lower than the IPX/SAP broadcasts we had from 20-25 yrs earlier. Dale Thus spake William Herrin (bill () herrin us) on Fri, Jun 04, 2021 at 02:01:19PM -0700:
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)