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OS X Mountain Lion server spontaneous DHCP?

851 Views 4 Replies Latest reply: Nov 19, 2012 7:02 AM by John Lockwood RSS
MacToeKnee Calculating status...
Currently Being Moderated
Nov 16, 2012 6:39 AM

I have DHCP service provided to a small school network by an Xserve running 10.6.8 server, not the new Mac mini server running 10.8.2, because the service is much more configurable in the old version (likely known to anyone perusing this forum). But we started having printing issues, and it turns out that the Mac mini started giving out IP addresses recently, despite the service being "off." Since it didn't have the reservations set, it gave some printers the wrong IP. I never turned the service on, but I wonder if the 10.8.2 update adding it to the Server app actually turns it on.


The Console log shows lots of DHCP Offers and acks, it should show none. Under Services, "Your Mac now provides these services: File Sharing, Software Update, Netinstall (which services the iMac lab). Under DHCP, the service is off, but it shows clients to which it leased an address.


I restricted the pool down to two addresses to reduce the possible problems, but I want to know a long-term fix. Something is horked.

  • iToaster Level 3 Level 3 (560 points)
    Currently Being Moderated
    Nov 16, 2012 10:57 AM (in response to MacToeKnee)

    Netinstall uses dhcp that will be the source of your 'rouge' dhcp server

    Can you not move the printers to fixed IP ?

  • iToaster Level 3 Level 3 (560 points)
    Currently Being Moderated
    Nov 17, 2012 7:48 AM (in response to MacToeKnee)

    I should clarify my thoughts

    Have you noticed the progressive dumbing down and removal of services with osx server since snow leopard

    If you read the kb for mountain lion server you'll see that netinstall can use the dhcp service independently

    At one stage there was no GUI for dhcp at all and upgrading lion to mountain lion preserved dhcp setting



    Additional Information

    The bootpd process, which is used by the DHCP service, is also used by the NetInstall service, but you can use either service independently or both together.


    I have heard of cases of the bootpd.plist having no dhcp entries


    Try running


    sudo serveradmin fullstatus netboot

    And have a look at dhcp

  • John Lockwood Level 5 Level 5 (5,075 points)
    Currently Being Moderated
    Nov 19, 2012 7:02 AM (in response to MacToeKnee)

    If your 10.8.2 server is an upgrade of an older server version it might be re-using the previous settings.




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