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IP conflict

September 14, 2009 at 19:06:41
Specs: Windows XP, 1GB RAM

DHCP client is unable to obtain an IP address. I am using a windows XP professional on an ethernet connection; on performing ipconfig/all, I receive:
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 0.0.0.0
Subnet Mask . . . . . . . . . . . : 0.0.0.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 255.255.255.255

Performing a ipconfig \release:
C:\Documents and Settings\193481>ipconfig /release

Windows IP Configuration

No operation can be performed on Wireless Network Connection while it has its me
dia disconnected.
IP Address for adapter Local Area Connection has already been released.

ipconfig/renew:

No operation can be performed on Wireless Network Connection while it has its me
dia disconnected.
An error occurred while renewing interface Local Area Connection : The DHCP clie
nt has obtained an IP address that is already in use on the network. The local i
nterface will be disabled until the DHCP client can obtain a new address.

I have stopeed and started DHCP service

I have disabled and enabled the device adapter

Checked pertinent registry entries

Performed ipconfig/flushdns

Performed ipconfig/registerdns

Re-set TCP/IP by performing:

>netsh int ip reset c:/reset.log

ALL to no avail, the system is still unable to procure a dynamic IP address. (Setting up a static IP address works.) Other systems on the network are able to procure IPs from DNS without a problem.

Please help!!!


See More: IP conflict

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#1
September 14, 2009 at 20:27:33

1st
Any firewall running on that system, that might block the DHCP traffic to that computer?

2nd
Tried to disable the service for Autoconfiguration for the wired network?


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#2
September 15, 2009 at 00:22:02

Have you also tried to reset the network wizard of the router? Also have you tried to see if you are running a computer the has wireless and wired connection?

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#3
September 15, 2009 at 03:23:16

An error occurred while renewing interface Local Area Connection : The DHCP client has obtained an IP address that is already in use on the network. The local interface will be disabled until the DHCP client can obtain a new address.

Sounds like everything is working correctly except that the DHCP server obtained an address that is already in use. Two computers on the same network with the same IP address is just not allowed.

This happens when there is another computer on the network that has been manual configured with an IP address that is within the DHCP scope. If this is the case then reconfigure that computer to get address automatically and reboot all computers.

another possibility is the the DHCP pool is too small for the number of computers on the network. You can check the size of the DHCP pool form your router configuration.


Stuart


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Related Solutions

#4
September 15, 2009 at 08:04:32

You don't get dhcp from dns. You get it from a dhcp server.

How many other pcs/units do you have and what ip addresses did they get?

Usual reason for this is you have done a static ip assignment to a machine but neglected to take that address out of the dhcp scope.

Review your pcs ip settings and routers dhcp server ip scope.


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#5
September 15, 2009 at 08:12:13

If I did not know better I would say that someone is spoofing a MAC address some where. Have you identified which computer may be using your IP address in the DHCP server? Also try changing the TTL in your DHCP server an delete your computers IP resorvation using the MAC of your NIC. It sound like it is holding onto your old IP way too long and some one has used it as a static IP.

As you can see it could be many things but without more information it is hard to tell. For now you could simply fix the problem by giving your self a static IP. Use a big number like 254.


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#6
September 15, 2009 at 12:29:01

It very well maybe paranoidn has both wired and wireless interfaces enabled when connecting wired.

Router may be trying to assign the same ip to both.

Solution is to right mouse click on the connection you are not using and disable it.


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#7
September 15, 2009 at 13:41:23

@wanderer
I guess, this would result in the same issue, because the IP address, that was assigned to the NICs dynamically, is stored in the registry.
If you disable one of the NICs, the IP is further stored in the registry and you'll get the error message again.
I guess, the only way to fix this, is to search the registry for "DhcpIPAddress" and look for the IP address, that causes the conflict and set the entry to empty.

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#8
September 15, 2009 at 13:53:08

or just ignore the message and go on which is what I do

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#9
September 15, 2009 at 13:56:28

I guess, the only way to fix this, is to search the registry for "DhcpIPAddress" and look for the IP address, that causes the conflict and set the entry to empty.

There's a far easier way to do that. ipconfig /release will release an addresses assigned by DHCP followed by ipconfig /renew. It does work.

Stuart


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#10
September 15, 2009 at 14:04:16

I know, that ipconfig /release is the normal and the easiest way, but did sometimes not work.
Had this problem in the past and search for a solution for an hour. Then I desidet to change the registry settings as described above, and it worked perfectly.

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#11
September 16, 2009 at 00:01:19

Well just like to add a question is it possible that there is a limit on IP address?

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