From: Jason Lunz <lunz@falooley.org>
To: user-mode-linux-devel@lists.sourceforge.net
Subject: [uml-devel] Re: Randomize on MAC address when bringing up ethernet iface
Date: Wed, 31 May 2006 19:56:06 +0000 (UTC) [thread overview]
Message-ID: <e5kscm$tt3$1@sea.gmane.org> (raw)
In-Reply-To: 20060531190553.GA6111@ccure.user-mode-linux.org
jdike@addtoit.com said:
> So what is the second bit? I only know about the broadcast/multicast bit, and
> no one has bothered clueing me in on any other special bits :-)
the other one's the "locally administered" bit. It's a lot like rfc1918
address space in ipv4, only for ethernet. wikipedia's discussion is
decent:
http://en.wikipedia.org/wiki/MAC_address
http://en.wikipedia.org/wiki/Locally_Administered_Address
those are the only two special mac address bits that i'm aware of.
The effect of setting it is that you ensure that your randomly-generated
mac address will never collide with a globally administered one. Of
course, it might collide with other locally-administered ones.
Jason
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next prev parent reply other threads:[~2006-05-31 19:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-30 18:12 [uml-devel] Randomize on MAC address when bringing up ethernet iface Blaisorblade
2006-05-31 17:09 ` [uml-devel] " Jason Lunz
2006-05-31 17:24 ` Blaisorblade
2006-05-31 19:05 ` [uml-devel] " Jeff Dike
2006-05-31 19:56 ` Jason Lunz [this message]
2006-06-01 8:40 ` Blaisorblade
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