[Xen-users] Re: Windows XP guest: Tap device isn't passing the traffic to linux

[Martin Leben <ml060223@xxxxxxxx>]

Hi Eljas,

Yes, 'ff:61:34:00:00:01' didn't work because it is a broadcast address. A 
broadcast address is specified by setting the least significant bit in the most 
significant byte to 1. (Example: '01:xx:xx:xx:xx:xx') That's a big NO-NO. :-) 
See <http://en.wikipedia.org/wiki/MAC_address>.
(And by the way, MAC address that begins with "x2", "x6", "xA" or "xE" are so 
called "locally administered addresses". Their first byte is binary "xxxxxx10".)
Best regards,
/Martin Leben


Eljas Alakulppi wrote:
> Okey, managed to solve the problem. The cause was the fact that I was 
> using 'ff:61:34:00:00:01' as my MAC adddress for Windows guest. I 
> changed 'ff' to '22' and traffic is passing properly.
> Eljas Alakulppi <Buzer@xxxxxxxxx> kirjoitti Sat, 26 Jan 2008 12:02:05 
> +0200:
> > Hello.
> >
> > I have installed Windows XP as HVM guest and I cannot get the network 
> > working. I want Xen to use vlan 15 (10.3.0.1/24) as the base interface 
> > on which bridge will be based on. Problem is, the tap0 device isn't 
> > passing the traffic to the bridge.
> > Pinging from Windows guest to Dom0:
> > ...

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