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IP addr conflict

Posted on 1999-07-06
Medium Priority
Last Modified: 2010-04-27
I have my computer connected to some network here. The computers are configured such that they obtain IP addresses autoatically from those that are free. There are more than enough for the machines, but the machine that I' working at keeps on saying; 'IP address conflict with machine so and and so" and then it won't get me into the net!
Question by:zebe73
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Expert Comment

ID: 1158610
Is your machine setups pointing at the correct DHCP & DNS?
LVL 12

Expert Comment

ID: 1158611
Do you have more than one DHCP-server on your LAN?

Does your computer "remember" the information from the DHCP-server,
and then use this "stale" information, when it cannot
get any "new" information from the DHCP-server?

Accepted Solution

bartt earned 150 total points
ID: 1158612
The problem with DHCP (used for assinging automaticly IP's) is that it has a lease period for a IP-address, and that during this process the IP is assignd to the same computer. If the computer is off-line the DCHP will release the IP.

But what is most probably the problem is that some user might set a static IP address on his Computer. So what you have to do is find the other one and look at the settings of his computer. You can do this by MAC-Address.

Good luck

LVL 12

Expert Comment

ID: 1158613
> If the computer is off-line the DCHP will release the IP.

Not quite correct.  

If the computer is off-line,
it cannot "release" the lease for the IP-address, and
it cannot "renew" the lease for the IP-address.

So, after the expiry of the lease,
the DHCP-server can "recycle" the IP-address,
and is free to assign it to the next DHCP request.


Expert Comment

ID: 1158614


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