On September 25, 2004 07:27 am, Ronald J. Hall wrote:
> On Saturday 25 September 2004 01:52 am, Stephen K�hn wrote:
> > MAC addresses are at hardware level; if the MAC address has changed,
> > consider disabling the card in BIOS and driving out to Greenville or
> > Pikeville for a new 10/100 card...
> >
> > --
> > stephen kuhn - proprietor
>
> As I reported to Lyvim, its all working again now, and reporting the
> original MAC address it had before. Because its "quirky" like this though,
> I'm gonna change it out ASAP.
>
> BTW, the local Wal-mart at Prestonsburg carries Linksys network cards
> Stephen, so I don't have to drive any real distance (5 miles/15 mins tops).
> :-)

Hi Ronald,

Out of nothing, at this point and keeping fingers crossed, did you check to 
see if the "phantom" MAC address on your son's card was duplicated in one of 
the other cards on your LAN?

The reason I ask is that he or someone else could have been playing around 
with something that could programmatically change a MAC address.  These 
changes are at software level not the hardwired level of the native MAC on 
the card itself.  But the effect is the same.  A duplicate MAC on a LAN can 
cause all kinds of problems including the one you're describing.

I spend four hours one day troubleshooting a customer ADSL setup only to check 
the LAN itself in sheer frustration and found the same MAC on three NIC 
cards.  After fixing it I asked the customer what they'd done.  They hadn't a 
clue but said that their computer guy, whose qualifications appear to be a 
mail order MSCE, had been in the day it all started and blamed it on my 
company.  It seems he was trying to get a Linksys ADSL router to spoof the 
internal MAC that had been registered with our network without going through 
the router setup to do it.

The strangest things happen sometimes and I'm starting to suspect that that's 
it.

ttfn

John (the well grounded :))
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