@bnrstnr said in Windows Server 2012R2 DHCP Server Memory Leak?:

I have some warnings and errors in the event viewer that I'm going through now. Is there any reason to have IPv6 enabled if we're not using it? A lot of warnings in there about IP6 supposed to be static only.

I wouldn't disable ipv6 unless you are unable to find and fix the real root cause of an issue in which disabling ipv6 may mask.

https://blogs.technet.microsoft.com/askpfeplat/2013/06/16/ipv6-for-the-windows-administrator-why-you-need-to-care-about-ipv6/

https://blogs.technet.microsoft.com/jlosey/2011/02/02/why-you-should-leave-ipv6-alone/

https://cwing.wordpress.com/2013/05/20/ipv6/