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  • Status: Solved
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DHCP failover configuration fails


I'm trying to configure DHCP failover on all of my scopes to another Server 2012 with DHCP installed. But when I try to configure DHCP failover, it comes with this error:

Error 20044. The class name being used is unknown or incorrect.

The class name being used is unknown or incorrect
What am I doing woring.
Sum Wum
Sum Wum
1 Solution
piyushranusriSystem Cloud SpecialistCommented:
please review these URL,

1. http://technet.microsoft.com/en-us/library/hh831385.aspx
2. http://blogs.technet.com/b/teamdhcp/archive/2012/06/28/ensuring-high-availability-of-dhcp-using-windows-server-2012-dhcp-failover.aspx

here Microsoft Article shows step by step, i think you should check the configuration from step 1. and keep in mind check your event logs
Sum WumAuthor Commented:
It turns out that it was a server option that there was something wrong with. After I deleted it and created it again, everything works.
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Thomas GrassiSystems AdministratorCommented:
Hope my article helped you determine that
Sum WumAuthor Commented:
I get the same error message. How did you find out what server option was 'wrong'?
Sum WumAuthor Commented:
I found out that I had manually entered the same option for both the scope and the server. After I removed it from the scope, it appeared as a server option and everything worked fine.

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