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Posted by News Reader on June 26, 2008, 3:45 pm
Howard Huntley wrote:
> What is going on, My Vista home ultimate HP dv9000z notebook is
> sending LAN a MAC: 00-00-00-00-00-00, I tested it with a fluke
> Lanmeter and verified that it is as it appears. When I used ARP, I am
> also showing a print server as having the same MAC:00-00-00-00-00-00.
> What is going on with this? Can any one give me some insite as to what
> is happening??
The only usage of 00-00-00-00-00-00 that comes to mind is Gratuitous ARPs.
Upon receiving a lease on an IP address, a Windows host sends three
Gratuitous ARP "Requests".
The host uses it's own addresses as the source addresses, and it's own
IP address as the destination address, but a target MAC address of
00:00:00:00:00:00.
Wouldn't think you would end up with an ARP entry based on a destination
MAC though.
Best Regards,
News Reader
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