RE: [Xen-devel] ARP problems in -testing?

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> ah, cool. it makes me wonder though.
> 
> in the IP the 10.x.x.x and 192.168.x.x are reserved for private use?
> is there such MAC address space reserved as well?
> 
> looking a bit around the web I was unable to find such guideliness.

>From xen/xm/create.py: 

def randomMAC():
    """Generate a random MAC address.

    Uses OUI (Organizationally Unique Identifier) AA:00:00, an
    unassigned one that used to belong to DEC. The OUI list is
    available at 'standards.ieee.org'.

    The remaining 3 fields are random, with the first bit of the first
    random field set 0.

    @return: MAC address string
    """
    random.seed()
    mac = [ 0xaa, 0x00, 0x00,
            random.randint(0x00, 0x7f),
            random.randint(0x00, 0xff),
            random.randint(0x00, 0xff) ]
    return ':'.join(map(lambda x: "%02x" % x, mac))


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