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DHCP service in Windows 2012 – are deactivated RRS feed

  • Question

  • Hi everyone,

    We encountered issue in our DHCP server in Windows 2012. The scopes suddenly deactivated and reactivated in just more than 1 minute, based on the evenlog that we got. Then some scopes are just stay deactivated. Reason for our users not be able to connect to the network until we manually reactivated the affected scopes.

    Event ID: 71, 73, 74, 75, 76, 106, 107, 108, 119, 120, 20221, 20223, 20237, 20239, 20315.

    For additional info, we have 2 dhcp server configured to Failover (Hot Standby mode).

    My question is what would be the possible execution was done in our DHCP service that cause the issue?

    Please help, I need to know what exactly happened, cause I might accidentally hit something in our dhcp server that I need to explain.

    Thank you in advance.

    Jerome

    Tuesday, April 19, 2016 5:47 AM

Answers

All replies

  • Hi

     You can also check events with "DHCP Server Events Tool";(scope events)

    https://blogs.technet.microsoft.com/teamdhcp/2009/03/20/dhcp-server-events-tool/

    And you can check dhcp configuration with BPA;

    https://technet.microsoft.com/en-us/library/hh831400.aspx

    https://technet.microsoft.com/en-us/library/ee941102(v=ws.10).aspx


    This posting is provided AS IS with no warranties or guarantees,and confers no rights. Best regards Burak Uğur

    • Proposed as answer by Hello_2018 Monday, April 25, 2016 3:51 PM
    • Marked as answer by Leo HanModerator Thursday, May 5, 2016 8:20 AM
    Tuesday, April 19, 2016 6:46 AM
  • Hi Jerome,

    >>My question is what would be the possible execution was done in our DHCP service that cause the issue?.

    Please help me to check the following location to see if there are any useful informations for us for further help:

    Location: event viewer->applications and services logs->Microsoft->windows->dhcp-server->Microsoft-windows-DHCP server events/operational

    From here you could see who activated or deactivated the DHCP scope.

    Besides, you could try to rebuild the DHCP failover relationship between the two DHCP servers for this specific scope to see if it helps.

    Additional resource for your reference:

    Troubleshooting DHCP servers

    https://technet.microsoft.com/en-sg/library/cc779112(v=ws.10).aspx

    https://technet.microsoft.com/en-us/library/cc958946.aspx

    Best regards,


    Andy_Pan







    • Edited by Hello_2018 Wednesday, April 20, 2016 2:58 AM
    Wednesday, April 20, 2016 2:48 AM
  • Hi Andy_Pan,

    Thank you for your reply. I have that logs in the sample captured image that you post. and its my account did the deactivation and reactivation of the scopes. the weird thing is I didn't remember that I do manually deactivate and reactivate a lot of scopes in our dhcp severs in just 1 minute, I just logon to the server and open the management console of dhcp. That is why my question is, is there any possible execution I did in 1 click (maybe accidentally) in dhcp that can do the deactivate and reactivate lots of scope in just 1 minutes?

    Regards,

    Jerome

    Wednesday, April 20, 2016 2:09 PM
  • Hi Jerome,

    >>That is why my question is, is there any possible execution I did in 1 click (maybe accidentally) in dhcp that can do the deactivate and reactivate lots of scope in just 1 minutes?

    As far as I know, normal operations couldn't do this : in 1 minute activated and deactivated so many scopes.

    So, I suggest you could check your system first to see if there are any virus and to check if there are any applications started or triggered these actions.

    You could open the task manager to monitor the related processes and restart the DHCP service to see if it helps.

    Best regards,


    Andy_Pan

    Thursday, April 21, 2016 6:56 AM
  • Did you found an anser to your post? I just had the same situation
    Wednesday, July 6, 2016 4:22 PM