Re: XP SP2 cannot contact DHCP after a restart

All our PCs, including Severs are all connected to a switch, the switch is
connected to a router and then out to the ISP.

I am kind of confuse, do you mind if you can explain a little bit more
detail.



"Chuck" wrote:

On Wed, 11 Apr 2007 07:30:02 -0700, vvii <vvii@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

"Chuck" wrote:

On Mon, 9 Apr 2007 08:24:01 -0700, vvii <vvii@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Now I am getting IP: 10.0.0.240/24 every once awhile after I have rebooted
the PCs.

Any other solutions?

What address are you normally getting from DHCP?

When you get the 10.0.0.240/24 address, check "ipconfig /all", and identify the
DHCP server. You probably have a rogue server somewhere, maybe a NAT router
giving out addresses.
<http://nitecruzr.blogspot.com/2005/05/reading-ipconfig-and-diagnosing.html>
http://nitecruzr.blogspot.com/2005/05/reading-ipconfig-and-diagnosing.html

we have a 192.168.1.x network with 192.168.1.2 DNS Server, 192.168.1.1
gateway, dhcp server 192.168.1.2

When I logon to the PC, and do ipconfig /all on the PC, I get the following:

Host Name: XXXXX
Primary DNS Suffix: mydomain.com
Node Type: Unknown
IP Routing Enable: NO
WINS: NO

Dhcp Enable: Yes
Autoconfiguration Enable: Yes
IP address: 10.0.0.241
Subnet mask: 255.255.255.0
Default Gateway:
DHCP Server: 10.0.0.3
Lease Obtained: Monday, April 9, 2007 12:25:19 PM
Lease Expires: Monday, April 9, 2007 12:35:19 PM

My client have to do ipconfig /release and ipconfig /renew in order to get
on to the domain.

OK, find the device with IP address 10.0.0.3 - that's the problem. Someone has
an extra NAT router stashed somewhere, maybe using it as a WiFi AP.

--
Cheers,
Chuck, MS-MVP [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.

.

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