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

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Message-ID: <20201114155614.GZ1480543@lunn.ch>
Date:   Sat, 14 Nov 2020 16:56:14 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     "Tj (Elloe Linux)" <ml.linux@...oe.vision>
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

> 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