On Wed, Feb 3, 2010 at 10:46 PM, David Newman <dnew...@networktest.com> wrote:
> On 2/3/10 7:38 PM, Dave Donovan wrote:
>
>> As for getting the new MAC, you can pretty much make it up.
>
> "Pretty much" is the operative term here. Some MAC address space is
> reserved for multicast (always beginning with 01:00:5E) and locally
> administered addresses (where the second bit of the first byte is set).
>
> But as long as high-order bits 0 and 1 of the MAC address' first byte
> are 0, and the addresses you choose aren't already in use on the same
> network, you should be fine.

Thanks for that.  My instinct was to stay away from the first half of
the address and change the latter bits but I wasn't aware of those
particulars.  I thought the first part indicated only the
manufacturer.

Dave

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