On Wed, Aug 15, 2007 at 04:26:23PM +0200, Joerg Mayer wrote:
> On Wed, Aug 15, 2007 at 03:31:08PM +0200, Sake Blok wrote:
> > I can't imagine myself situations where you locally assign an
> > address and still be interested in the manufacturor of the card
> > from which the mac was used as seed. I usually use a BCD encoded
> > vlan-tag-number as the LA-mac, this would result in something
> > like "Local_00:01:30" for vlan 130 :-)
>
> I don't think that's a good idea. Just leave the number in there,
> because otherwise addresses local_00:01:02 and local_00:01:02 would look
> the same, while the first local might have a value of 36:37:38 and
> the second local value might be 02:00:00
True, but that risk is already there for a lot of Vendors:
sake@richie:~/wireshark$ grep "^..:" manuf | awk '{print $2}' | sort | uniq -c | sort -rn | head
321 Cisco
52 Private
28 NokiaDanma
23 NortelNetw
22 TexasInstr
22 Intel
21 Nortel
19 3com
18 SamsungEle
18 HewlettPac
sake@richie:~/wireshark$
Of course the risk is bigger in this case, although I think in practice
it would not occur very often :-)
Maybe just adding a line:
02:00:00 Local # LOCALLY ADMINISTRATED ADDRESS
would be an option. That way, there are no duplicates. This is of course
only beneficial other people besides me choose their locally administrated
addresses within 02:00:00:XX:XX:XX .
Are there any other people that choose their addresses like this?
Cheers,
Sake
