Hi,
Thanks for the post.
From your description, my understanding is you would like to enable the routing function on the DC.
If so, It is not recommended to enable RRAS on a DC. Otherwise, you may have a name resolution or connectivity issue. You should install RRAS on one of member server.
For more information, please refer to the following article
Active Directory communication fails on multihomed domain controllers
If I have any misunderstood on this issue, please feel free to let me know.
Thanks,
Miles
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