IP Conflict on Domain Controller

By Razor1185 ·
Hi all,

We're running Windows Server 2003 as our DC,
DNS & DHCP server. It's assigned a static IP,
has a single network card and we have no
problems with any of the configurations.


Today, for about an hour, the server registered
an IP address conflict. This caused a total
loss of connectivity for the entire site as
clients lost DNS, DHCP and Active Directory

After isolating the problem, I restarted the
server, which stopped the error messages and
kicked the network back into life.

Now here's the strange thing...

For obvious reasons, our static IP addresses
fall outside of the DHCP address pool, meaning
that DHCP couldn't cause the rogue address.
Our site is small enough for me to know that
there have been no 'foreign' items introduced
to the network which might have the same IP
address. Also, no changes have been made to
switches or routers that might cause the error.
The MAC address recorded by the event viewer
does not match any of our servers.

The server has the latest service
packs/updates/drivers installed.

Whilst the problem has been resolved, I would
like to know if anyone else has experienced
similar 'ghost' addresses. If so, have you
encountered repeat incidents? I don't want
this error to reoccur.




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