netdev - Re: [PATCH 0/6] realtek: fix management of mdb entries

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Date:   Wed, 22 Mar 2023 12:26:40 +0100
From:   Bjørn Mork <bjorn@...k.no>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Jan Hoffmann <jan@....eu>,
        Arınç ÜNAL <arinc.unal@...nc9.com>,
        netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        openwrt-devel@...ts.openwrt.org,
        Sander Vanheule <sander@...nheule.net>,
        erkin.bozoglu@...ont.com
Subject: Re: [PATCH 0/6] realtek: fix management of mdb entries

Vladimir Oltean <olteanv@...il.com> writes:

> As a way to fix a bug quickly and get correct behavior, I guess there's
> also the option of stopping to process multicast packets in hardware,
> and configure the switch to always send any multicast to the CPU port
> only.

I don't think that's an option.  The CPU is dimensioned for switch
management. For the RTL838x, using the current ethernet driver, it tends
to break down completely at 30-40 Mbits/s.

Multicast offloading is necessary to be able to use one of these devices
for e.g IPTV.  Which definitely is a relevant use case.

Bjørn