netdev - Re: question on random MAC in usbnet

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Message-ID: <20891d0a-6ec0-4865-bf61-406f29f2ac6a@lunn.ch>
Date: Sun, 19 Nov 2023 17:13:18 +0100
From: Andrew Lunn <andrew@...n.ch>
To: David Laight <David.Laight@...lab.com>
Cc: 'Bjørn Mork' <bjorn@...k.no>,
	Oliver Neukum <oneukum@...e.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: question on random MAC in usbnet

> So you might want to save the MAC on device removal and
> re-use it on the next insert.

That gets interesting when you have multiple USB-Ethernet dongles.

I have a machine with 20 of them, which i use for functional testing
of Ethernet switches. Luckily for me, they all have a vendor assigned
MAC address.

> 
> [1] We ended up putting the USB interface inside a 'bond'
> in order to stop the interface everything was using
> randomly disappearing due to common-mode noise on the
> USB data lines causing a disconnect.

Maybe you should of just thrown the hardware away since it seems
broken.

	Andrew