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RE: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt

Dmitry Anipko <Dmitry.Anipko@microsoft.com> Fri, 17 January 2014 19:14 UTC

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From: Dmitry Anipko <Dmitry.Anipko@microsoft.com>
To: Lorenzo Colitti <lorenzo@google.com>
Subject: RE: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt
Thread-Topic: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt
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Date: Fri, 17 Jan 2014 19:14:35 +0000
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>>A more precise statement would be that the number of solicited-node groups scales linearly with the number of IPv6 addresses assigned to hosts,


Agreed. And generally, number of addresses can be more than 2-3 (because of multiple prefixes, and because of multiple suffixes due to privacy extensions).


>>which is something that people don't usually seem to worry about.


We have recently seen issues in some APs, where they were not able to handle multiple addresses per host, because of some state maintained per host (that's not a justification that host should not have multiple addresses, but I just wanted to note that today there are issues in some cases related to that).


________________________________
From: Lorenzo Colitti <lorenzo@google.com>
Sent: Friday, January 17, 2014 11:01 AM
To: Dmitry Anipko
Cc: Ole Troan; Ing-Wher Chen; 6man WG
Subject: Re: MLD snooping of solicted-node multicast (Was: Re: New Version Notification for draft-halpern-6man-nd-pre-resolve-addr-00.txt

On Fri, Jan 17, 2014 at 10:39 AM, Dmitry Anipko <Dmitry.Anipko@microsoft.com<mailto:Dmitry.Anipko@microsoft.com>> wrote:
>> There are basically two solicited-node groups per host

Does this assume that typically there are only 2 non link-local IPv6 addresses  per host? (since different addresses are unlikely to fall in the same group, as long as they have different interface identifiers)

A more precise statement would be that the number of solicited-node groups scales linearly with the number of IPv6 addresses assigned to hosts, which is something that people don't usually seem to worry about.

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