netdev - Re: dsa: mv88e6xxx not receiving IPv6 multicast packets

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Date:   Sat, 14 Nov 2020 16:06:33 +0000
From:   "Tj (Elloe Linux)" <ml.linux@...oe.vision>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, chris.packham@...iedtelesis.co.nz,
        f.fainelli@...il.com, marek.behun@....cz, vivien.didelot@...il.com,
        info <info@...ris.cz>
Subject: Re: dsa: mv88e6xxx not receiving IPv6 multicast packets

On 14/11/2020 15:56, Andrew Lunn wrote:
>> 1) with isc-dhcp-server configured with very short lease times (180
>> seconds). After mox reboot (or systemctl restart systemd-networkd)
>> clients successfully obtain a lease and a couple of RENEWs (requested
>> after 90 seconds) but then all goes silent, Mox OS no longer sees the
>> IPv6 multicast RENEW packets and client leases expire.
> 
> So it takes about 3 minutes to reproduce this?
> 
> Can you do a git bisect to figure out which change broke it? It will
> take you maybe 5 minutes per step, and given the wide range of
> kernels, i'm guessing you need around 15 steps. So maybe two hours of
> work.
> 
> 	Andrew
>

I'll check if we can - the problem might be the Turris Mox kernel is
based on a board support package drop by Marvell so I'm not clear right
now how divergent they are. Hopefully the Turris kernel devs can help on
that.