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Thread: Question regarding migrating the dhcpd.leases file for ISC-DHCP-SERVER

  1. #1
    Join Date
    Apr 2012
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    19

    Question regarding migrating the dhcpd.leases file for ISC-DHCP-SERVER

    Backstory: I am in the process of replacing a SINGLE Debian 3.1 (Sarge) ISC-DHCP-SERVER (v3.0.1) with 2 Ubuntu 12.04 LTS x64 servers running ISC-DHCP-SERVER (v4.1-ESV-R4) in failover mode. I've been unable to find the answer to this on Google, and my internal testing on an empty subnet has yielded interesting results (please note I'm relatively new to Linux):

    Here are my 3 questions:

    1) Should I copy the dhcpd.leases and dhcpd.leases~ files from my Debian server to /var/lib/dhcp/ on both of the new servers and then start the DHCP services? Will the files then balance themselves?

    2) Should I copy the dhcpd.leases and dhcpd.leases~ files to /var/lib/dhcp/ on only the primary failover server, and let the secondary server generate one from scratch after the DHCP services have been started?

    3) Should I not bother copying the files at all, and let the 2 new Ubuntu servers generate the files from scratch in /var/lib/dhcp/?

    TIA!
    -Snipe

  2. #2
    Join Date
    Jun 2008
    Location
    Tennessee
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    3,421

    Re: Question regarding migrating the dhcpd.leases file for ISC-DHCP-SERVER

    Is there any reason you want to have the clients keep the same leases?

  3. #3
    Join Date
    Apr 2012
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    19

    Re: Question regarding migrating the dhcpd.leases file for ISC-DHCP-SERVER

    Quote Originally Posted by lykwydchykyn View Post
    Is there any reason you want to have the clients keep the same leases?
    Hey,

    We don't care if the clients keep the same leases, as long as they successfully get leases. Please note we're running a mixed Windows and Linux environment.

    Thanks,
    -Snipe

  4. #4
    Join Date
    Nov 2008
    Location
    Metro Boston
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    10,247
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Question regarding migrating the dhcpd.leases file for ISC-DHCP-SERVER

    Then you don't need the leases file. It doesn't matter what the clients are running.
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

    Blog · Linode System Administration Guides · Android Apps for Ubuntu Users

  5. #5
    Join Date
    Jun 2008
    Location
    Tennessee
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    3,421

    Re: Question regarding migrating the dhcpd.leases file for ISC-DHCP-SERVER

    I agree. I think you'll be best off letting the server do its own leases file. Trying to migrate one from a different server and version is asking for trouble.

  6. #6
    Join Date
    Apr 2012
    Beans
    19

    Re: Question regarding migrating the dhcpd.leases file for ISC-DHCP-SERVER

    Thank you VERY much for the help everyone, I'll be going with brand new, empty files =)

    -Snipe

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