Free up Dhcp server

Posted on 2012-09-08
Last Modified: 2012-09-08
I have a dhcp server .The leases are set to expire 365 days.What if I were to delete all of the leases and set the scope to expire 3 days. Would the clients have issues?
Question by:jaxnmj
    LVL 10

    Assisted Solution

    If the dhcp server assigns an ip to a client and the client, which had this lease before is powered on it might get a conflict.

    I would suggest to just reduce the lease time first and then wait a few days. Depending on your dhcp server it will announce the new lease time to clients when they ask next time.  After a few days you can delete all leases with a big lease time.
    LVL 19

    Assisted Solution

    No. Clients should not have any issues. If you have some ip reservations made (mac address) than just be careful not to delete these (if you do not want to touch them).
    But in general clients who, I  suppose, are set to obtain IP from dhcp should not have any problem with this.
    LVL 17

    Assisted Solution

    You should lower the lease time then reboot all you pc's.
    LVL 44

    Accepted Solution

    If you reboot them all as lruiz52 suggested, there shouldn't be a problem... but if they aren't rebooted (or at least forced to release/renew their address), it could be up to 6 months before they're notified of the lease change... because they'll try to renew the lease when it's half gone, and at that point they would be told the new lease time.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    IT, Stop Being Called Into Every Meeting

    Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

    Ever wondered why you had to use DHCP options (dhcp opt 60, 66 or 67) in order to use PXE? Well, you don't!
    A Cisco router can be configured as a DHCP Server. There are advantages and disadvantages in making your Cisco router work as DHCP Server. Almost all the features for windows DHCP can be configured on Cisco-based DHCP server. Some of the features me…
    Sending a Secure fax is easy with eFax Corporate ( First, Just open a new email message.  In the To field, type your recipient's fax number You can even send a secure international fax — just include t…
    Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

    760 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    8 Experts available now in Live!

    Get 1:1 Help Now