What is the mac address 04:48:80:80:80:03 and why is it not unique?

Posted on 2011-10-25
Last Modified: 2012-05-12
I have a  problem with a Sun server where it's not starting a boot net due to a failure of the dhcp/bootp request. Whe I look at the trace I see my Sun machine sending out the bootp request but it has a hardware address of 04:48:80:80:80:03. This OUI is not from our company. A google search shows other folks having problems and this address is embedded in their problem description. Since all mac addresses are supposed to be unique (except for recycled) how can so many people have complaints with this same mac address?
Question by:TGarey123
    LVL 12

    Accepted Solution


    04:48:80:80:80:03 is not a valid MAC? I would be hunting down the source of this request.
    LVL 14

    Expert Comment

    I only find a few threads when searching for that mac address, and they all seem to be about the same person's issue with SBC and Gentoo... That mac address is assigned to that person's linux machine's eth0 interface.

    Perhaps that mac address was manually assigned to that sun server?  

    Author Comment

    Hummm....seems very weird that several machines can report the same mac address....and only when there seems to be some problem.....and what about the OUI of 04:48:80? Isn't this supposed to identify the manufacturer? I can't even find out who this belongs to.
    LVL 12

    Assisted Solution

    by:Gary Coltharp
    it doesnt belong to anyone..its not valid. That MAC has been spoofed.

    Author Comment

    What does it mean to have a mac spoofed? This was a machine that came directly from the factory and when we noticed the weird mac address with a OUI that was unidentifiable I searched the web to see who the OUI belonged to. From the search noticed other people with the same exact full mac with hardware problems. This was in Feb 2009 and I seem to remember from that google search (I was in Poland at the time) many other identical mac's being reported along side some problem they were troubleshooting. I seem to remember this is a mac address that is used when a hardware failure occurs. This led us to check all bois settings and sure enough the Baseboard Module Controller (BMC) of the Sun Netra x4200 was bad. The other node of the cluster was fine. So I don't know what it means that the mac was spoofed. I guess I'm trying to figure out if there is some specification that uses this mac address in case of hardware failures.

    Author Closing Comment

    Sorry for the question.....this is a valid mac (sort of)and I believe it's used by manufacturer's when there is an on board hardware failure that will not allow a machine to boot up. This is what I learned when I Google this mac from Poland in Jan of 2009. I was on a job and a Sun server (x4200) has a bad on board controller and the MB needed to be replaced. Back then there were much more different search results on this weird mac, so I don't know why there is only one search result now....perhaps because I was in Poland and not the US? Anyway the search led me to believe that this mac is sent out when hardware problems are preventing a boot up.

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