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Bob-7923 asked DSPatrick answered

Add a Server 2019 as secondary DC to an exisitng 2012 R2 domain

I have an existing 2012 R2 domain. I just added a new Server 2019 that I would like to use as a secondary DC. I have already stood up the new server, patched it fully and joined it to the existing domain. I then ran the following on the existing server:

Dcdiag /v /c /d /e /s:%computername% >c:\dcdiag.log
repadmin /showrepl >C:\repl.txt
ipconfig /all > C:\dc1.txt
ipconfig /all > C:\dc2.txt (on Server 2019)

This is a link to the log files:
https://1drv.ms/u/s!Aouxg5sxJzUJcPSRx55-D_LFHnw?e=sJN2Ta

Can I get guidance on how to perform this correctly please.

@DSPatrick

windows-active-directorywindows-server-2019windows-server-2012
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DSPatrick answered

SERVER2 is still multi-homed.

dcdiag looks good. Should be Ok to proceed after disabling the other unused adapter.

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DSPatrick answered Bob-7923 commented
  • Server is multi-homed which will always cause no end to grief for active directory DNS so I'd remove / disable the second adapter

  • Server has a class A mask which seems a little odd.

  • Server should also have own static ip address (10.1.10.2) listed for DNS
    After above corrections then do ipconfig /flushdns, ipconfig /registerdns, restart the netlogon service


All the exact same issues with SERVER2


I did not look at other files since these issues are show stoppers. After fixing issues if problems persist then put up a new set of files to look at.


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Thank you for your assistance.

I made the suggested changes and re-ran the commands. The class A had already been configured when I came on, so while it may be a little odd, it works. Here is a link to the refreshed logs

https://1drv.ms/u/s!Aouxg5sxJzUJeiuG5uRsxNYAeA4?e=B54K0H

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