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Re: [v6ops] privacy point re. unsolicited NA / router neighbor cache

Gert Doering <gert@space.net> Tue, 23 July 2019 13:48 UTC

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Date: Tue, 23 Jul 2019 15:48:25 +0200
From: Gert Doering <gert@space.net>
To: Sander Steffann <sander@steffann.nl>
Cc: Gert Döring <gert@space.net>, David Lamparter <equinox@diac24.net>, v6ops list <v6ops@ietf.org>
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Subject: Re: [v6ops] privacy point re. unsolicited NA / router neighbor cache
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Hi,

On Tue, Jul 23, 2019 at 03:32:47PM +0200, Sander Steffann wrote:
> > The general idea that on-link multicast is a positive aspect of IPv6
> > is nice, but wrong.
> 
> Well, a little bit :)
> 
> There is still the advantage that the NIC can apply its MAC address filter. L2 destination FF:FF:FF:FF:FF:FF can't be filtered there, but 33:33:* can :)

Given the insanity of modern NICs, I have no doubt it could filter about
everything the host want to see :-)

(Shall I say "LLDP agent inside the NIC that you can't easily get rid of"?)

But seriously - given that the amount of multicast traffic that goes 
to a group address is totally negilible compared to the amount of 
"TO ALL!" traffic caused by netbios, bonjour, ... - and that we do not
really have 10 Mbit NICs anymore, I still maintain that this was one
of the IPv6 "improvements" where unintended side effects by far outweigh
the small benefits.

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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