From: David Brownell <david-b@pacbell•net>
To: Peter Korsgaard <jacmet@sunsite•dk>
Cc: Wu Fengguang <wfg@linux•intel.com>, netdev@vger•kernel.org
Subject: Re: [PATCH] dm9601: handle corrupt mac address
Date: Tue, 6 Jan 2009 02:28:16 -0800 [thread overview]
Message-ID: <200901060228.16744.david-b@pacbell.net> (raw)
In-Reply-To: <874p0cvnae.fsf@macbook.be.48ers.dk>
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.
What happens when you unplug one then re-plug it? Maybe
someone trips over the USB cable, or it gets an electrical
glitch that evalutes to disconnect/reconnect... It gets
the same address again. Not particularly broken.
Note that Ethernet was *designed* around using a single
address per host ... I still have XNS docs sitting around
somewhere, that was a fairly significant thing. One of the
original reasons Ethernet adapter addresses could change
was to make sure that all Ethernet interfaces on a host
would use the same address.
That said ... if it bothers you, that's easy to change
in userspace. This code has worked this way for around
nine years now; I don't recall any previous complaints.
- Dave
next prev parent reply other threads:[~2009-01-06 10:28 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 [this message]
2009-01-06 10:56 ` Peter Korsgaard
2009-01-06 18:55 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200901060228.16744.david-b@pacbell.net \
--to=david-b@pacbell$(echo .)net \
--cc=jacmet@sunsite$(echo .)dk \
--cc=netdev@vger$(echo .)kernel.org \
--cc=wfg@linux$(echo .)intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox