netdev - Re: [PATCH net-next v3 0/5] net: dsa: remove .set

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Message-ID: <20171016164737.GD13339@lunn.ch>
Date:   Mon, 16 Oct 2017 18:47:37 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Rodney Cummings <rodney.cummings@...com>
Cc:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel@...oirfairelinux.com" <kernel@...oirfairelinux.com>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Laight <David.Laight@...LAB.COM>
Subject: Re: [PATCH net-next v3 0/5] net: dsa: remove .set_addr

On Mon, Oct 16, 2017 at 04:28:04PM +0000, Rodney Cummings wrote:
> Hi Andrew,
> 
> I may have misunderstood.
> 
> If this MAC address is the destination

Nope. This is the source address, for Pause frames.

> My concern is that for a source MAC address, a local random MAC
> address is not safe in all networks, because it has the potential
> for duplication. That topic has been discussed quite a bit in IEEE
> 802.

Duplications don't matter, for pause frames. The source address
appears to be unused. And these frames don't get passed the direct
peers MAC layer.

	Andrew