AUtomatically clear old dhcp reservations

Posted on 2008-02-01
Medium Priority
Last Modified: 2010-04-21

Is there anyway to automatically clear old DHCP reservations from a windows 2003 DHCP server?  I've got a scope that gets filled up (and I cant add/modify the scope) regualrly and I need to clear out old reservations.

Many thanks
Question by:jmsjms
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LVL 11

Expert Comment

by:Jon Winterburn
ID: 20797990
The point of DHCP reservations is to ensure that no other device ever uses that reserved IP; therefore, automatic deletion of IP reservations in DHCP would be contrary to it's reason for being! Reservations can only be deleted manually.

Are you sure you are referring to reservations, and not simply address leases? If it's the leases you are referring to, then the only way of setting the expiration of these leases is by editing the properties of the scope and changing the lease duration.

Author Comment

ID: 20798359
Sorry, just tro confirm.  I'm talking about leases.

So are you saying that the only way to free up leases no longer used is to reduce the lease time?

LVL 11

Accepted Solution

Jon Winterburn earned 500 total points
ID: 20800941
Yes, or right-click on the lease or leases and select delete; if you have access to the DHCP server.

Author Closing Comment

ID: 31427163
Thanks.  BIt dispointing there's no util to clear unused reservations but there you go!  Cheers J

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