netdev - Re: [RFC net-next] net: dsa: add support for MC

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Date:   Sun, 23 Jun 2019 08:26:05 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Ido Schimmel <idosch@...lanox.com>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jiri Pirko <jiri@...nulli.us>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "davem@...emloft.net" <davem@...emloft.net>
Subject: Re: [RFC net-next] net: dsa: add support for MC_DISABLED attribute

On Sun, Jun 23, 2019 at 07:09:52AM +0000, Ido Schimmel wrote:
> When multicast snooping is enabled unregistered multicast traffic should
> only be flooded to mrouter ports.

Given that IPv6 relies upon multicast working, and multicast snooping
is a kernel configuration option, and MLD messages will only be sent
when whenever the configuration on the target changes, and there may
not be a multicast querier in the system, who does that ensure that
IPv6 can work on a bridge where the kernel configured and built with
multicast snooping enabled?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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