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DHCP error "This address is already in use"

Posted on 2004-03-31
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Last Modified: 2013-12-19
I have a large network (100+ nodes) on which I run Win2000 Server for DHCP. I had the lease time set to 21 days and for a year there was no problem. However, lately I've been getting a significant number of addresses with "This address is already in use" added to them in the description section. I reduced the lease time to 7 days and waited for the original 21 day leases to expire and the number of these has decreased, but I still have a dozen or so at any given time.

What is causing this and how can I fix it?
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Question by:chrisfuzy
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SunBow earned 125 total points
ID: 10729085
Have you had the subnet range inadvertently redefined?  Maybe people are hardcoding their addresses (policy enforcement) or possibly you have a rogue address provider, such as happened to at least one user when they got a new router.  Check the dhcp programs from the resource kit for finding rogues and stamp them out when found
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