Re: Software to test MAC address privacy
- From: Glen Turner <gdt gdt id au>
- To: Robert Moskowitz <rgm htt-consult com>
- Cc: Network Manager <networkmanager-list gnome org>
- Subject: Re: Software to test MAC address privacy
- Date: Sun, 3 Aug 2014 18:28:23 +0930
On 19/07/2014 Robert Moskowitz wrote:
Actually the standard uses the first 2 bits for this. It is called local scope MAC addresses. This leaves
46 bits for the random content. Thus if you have a network of 10000 devices the probablity of a collision
is 7x10^-7
Hello Robert,
Not all locally-assigned addresses are available for use as random MAC addresses. Last I looked that are
historical uses of LAS for DECnet and other protocols from 00:… through to 05:…. It would be useful if the
IEEE recommended a range of LAS for host use (ie, virtual machine MAC addresses) and specified a range for
your random MAC address proposal. Such a range should leave sufficient LAS for other potential future
applications.
Regards, glen
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