Jette Goldie wrote:

>
> On Sat, 30 Sep 2006 14:51:45 -0400, AJR wrote:
>
>> MAC is a hardware address "permanently burned-in" by the
>> manufacturer. If Windows detects two identical MACS a system event log
>> entry is generated and network connectivity cease.
>
> Is the MAC address "really" burned in?

Yes, there's usually some method to revert a programmable network device
back to it's original MAC.

> MacMakeUp seems to "change" the MAC address at will.
> http://www.gorlani.com/publicprj/mac.../macmakeup.asp

You have a programmable network card and are telling it to spoof a different
MAC address.

> Your computer was not able to renew its address from the network (from the
> DHCP Server) for the Network Card with network address D45C0B039834. The
> following error occurred:
> The semaphore timeout period has expired. . Your computer will continue to
> try and obtain an address on its own from the network address (DHCP)
> server.

I don't know enough about Windows error messages to know what it's calling a
semaphore timeout (though I wouldn't mind learning). Only thing I can
think of is that your machine sent a DHCP request, the DHCP server
responded with an answer and the other machine with the same MAC address
answered first, the first machine then ignores the acknowledgement it
wasn't expecting to get out of order and times out, however, this is just a
theory I can't prove without a packet analyzer on the same network you're
on. I don't have a lot of confidence in my hypothesis though: Most people
make it a point not to put two of the same MAC address on the same network.

> This may or may not be a red herring because the sysytem "seems" to be
> working well.



--
Baloo
email & xmpp: baloo@ursine.ca