RE: [Xen-users] Slow windows network with gplpv driver.

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> 
> The MAC in question started with the QEMU first bytes. It looked
something
> like this, but with a different last three bytes:
> 
> 52:54:00:68:0C:E5
> 
> Would anything in those last three bytes cause an issue?
> 
> Since then, I have switched to using Xen MACs (starting with
00:16:3E), though
> I don't know if this will matter.
> 

The bits that matter are the lower 2 bits of the first byte. Bit 0
indicates a unicast (0) or multicast (1) address. Bit 1 indicates a
globally unique (0) or a locally administered (1) address. Your value of
52 is a unicast locally administered address, and appears fine. Your
00:16:3E address is also okay, but if it's an address you are making up
and controlling yourself you might want to set the locally administered
bit.

Wikipedia is probably a good starting point -
http://en.wikipedia.org/wiki/Mac_address

James

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