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Date:   Wed, 28 Jul 2021 23:09:36 +0200
From:   Andrew Lunn <andrew@lunn.ch>
To:     Dario Alcocer <dalcocer@helixd.com>
Cc:     netdev@vger.kernel.org
Subject: Re: Marvell switch port shows LOWERLAYERDOWN, ping fails
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> I did notice that the RJ45 link LED on each of the peer devices no longer
> light up. Previously, the LED was coming on. Perhaps it's time to check the
> following:
> 
> - confirm the network cable for each link peer is good
> - confirm each link peer works by connecting to a 100baseT or 1000baseT
> switch

ethtool --cable-test lan1

Needs a reasonably modern kernel and ethtool :-)

And i don't know if the internal PHYs in that switch actually support
it, and the PHY driver has the needed callbacks for that PHY model.

      Andrew