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OkechukwuOchiaka-7760 asked DSPatrick commented

Cannot add new DC with old dead DC IP

Our secondary DC crashed, and i had to create a new secondary dc as many users have it configured as their preferred DNS server.
The promotion of the new secondary keeps failing whenever I use the same IP as the dead DC.
PS: I have removed all references to the old dc on the domain before recreation.
I tried changing the IP after using a new IP to create, but it stops replicating to the PDC once that's done.
What do I do? manually changing the DNS for all users will be very tasking.

windows-active-directory
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DSPatrick answered OkechukwuOchiaka-7760 commented
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Thanks for the response, DSPatrick.
I have done all these cleanups and removed every reference to the dead DC but still can't use that IP.
ntdsutil shows no reference to the dead dc and I have also deleted the record from sites and services.



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DSPatrick avatar image
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DSPatrick answered DSPatrick commented

Please run;

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
ipconfig /all > C:\dc3.txt
ipconfig /all > C:\problemmember.txt

then put unzipped text files up on [OneDrive][1] and share a link.


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I have been able to use the same computer name to create a new DC but whenever I try with the same IP it keeps failing.

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DSPatrick avatar image DSPatrick OkechukwuOchiaka-7760 ·

dcdiag is corrupt., do not edit the commands.


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New dcdiag uploaded

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rr-4098 avatar image
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rr-4098 answered OkechukwuOchiaka-7760 commented

Is it possible the IP was taken by another device? Can you ping the IP? Also try checking your switch logs to see if the IP is reported anywhere.

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The IP is unassigned

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OkechukwuOchiaka-7760 answered OkechukwuOchiaka-7760 edited

I took down all the secondary DC and brought up a new secondary DC, on bringing it up replication with the PDC was successful but after 24hrs replication is failing currently. The new Secondary DC has been created with an entirely new IP.

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DSPatrick avatar image
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DSPatrick answered DSPatrick commented

You can try a non authoritative sync
https://support.microsoft.com/en-us/help/2218556/how-to-force-an-authoritative-and-non-authoritative-synchronization-fo

--please don't forget to upvote and Accept as answer if the reply is helpful--






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Just checking if there's any progress or updates?

--please don't forget to upvote and Accept as answer if the reply is helpful--



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rr-4098 avatar image
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rr-4098 answered

What are the replication error you are getting?

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