Many users are reporting being notified via a balloon tip that there was an IP address conflict. This has always been immediately resolved by the workstation requesting a new address, but it is still disturbing for the user, and so I would like to resolve it one way or the other.


Has anybody else had a similar issue? 

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how long is your lease time set for in DHCP?  If it is to short you can get tihis symptom, also go to the nic's properties and uncheck the alllow the computer to turn off this device to save power

Answered 12/11/2012 by: SMal.tmcc
Red Belt

  • Agree with the lease time, it would solve it for you if you set it high enough. Did not know that hibernation sort of holds the IP, never saw those issues. The leases I have seen were e.g. 42 days for both laptops and desktops but I guess this is a topic you are able to argue about sometimes.
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I dont know that its possible to disable the pop-up, nor would i want to?.  But if you are using hibernation on your systems I would disable it.  Hibernation saves the IP address currently being used when it goes down.  Then your DHCP server sees that the IP is no longer being used so it will reissue it when the lease is up.  When the initial system resumes from hibernation with the same ip address it will cause the conflict.  You could increase your lease time or disable hibernation to resolve the issue.  


Answered 12/10/2012 by: WhitzEnd
Seventh Degree Black Belt

  • I have been suspecting that the issue is related to old IP addresses that persist after sleep or hibernation, but I can't seem to find any authoritative description of how windows 7 handles IPs. Do you know of anything?
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