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From: Peter Korsgaard <jacmet@sunsite.dk>
To: David Brownell <david-b@pacbell.net>
Cc: Wu Fengguang <wfg@linux.intel.com>, netdev@vger.kernel.org
Subject: Re: [PATCH] dm9601: handle corrupt mac address
Date: Tue, 06 Jan 2009 11:56:16 +0100	[thread overview]
Message-ID: <87vdssu2i7.fsf@macbook.be.48ers.dk> (raw)
In-Reply-To: <200901060228.16744.david-b@pacbell.net> (David Brownell's message of "Tue\, 6 Jan 2009 02\:28\:16 -0800")

>>>>> "David" == David Brownell <david-b@pacbell.net> writes:

 David> On Tuesday 06 January 2009, Peter Korsgaard wrote:
 >> So what happens if you plug in 2 devices without an EEPROM? Do they
 >> get the same MAC address? That seems broken.

 David> What happens when you unplug one then re-plug it?  Maybe
 David> someone trips over the USB cable, or it gets an electrical
 David> glitch that evalutes to disconnect/reconnect... It gets
 David> the same address again.  Not particularly broken.

 David> Note that Ethernet was *designed* around using a single
 David> address per host ... I still have XNS docs sitting around
 David> somewhere, that was a fairly significant thing.  One of the
 David> original reasons Ethernet adapter addresses could change
 David> was to make sure that all Ethernet interfaces on a host
 David> would use the same address.

 David> That said ... if it bothers you, that's easy to change
 David> in userspace.  This code has worked this way for around
 David> nine years now; I don't recall any previous complaints.

Ok, I don't feel particular strongly about it, just found it odd.

-- 
Bye, Peter Korsgaard

  reply	other threads:[~2009-01-06 10:56 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-06  6:14 [PATCH] dm9601: handle corrupt mac address Wu Fengguang
2009-01-06  8:04 ` Peter Korsgaard
2009-01-06  8:29   ` Wu Fengguang
2009-01-06  8:42     ` Peter Korsgaard
2009-01-06  9:50       ` Wu Fengguang
2009-01-06 10:28       ` David Brownell
2009-01-06 10:56         ` Peter Korsgaard [this message]
2009-01-06 18:55   ` David Miller

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