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Greg CobbFlag for United States of America

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Changed DNS Servers

We moved DNS from a retired 2003 server to another server.  But we left both up for a while to make sure everything came across to the 2012 server.  I have been hearing some users mention particular web sites not coming up.  One user earlier today couldn't get anything on the web to come up so I did a release, renew and flushdns and she was fine.

After looking at reports I see errors saying none of the IP addresses that are being used are registered.  The attached file shows current entries but only for the DHCP scope.

The person who disabled the retired server did his work over the phone.  I think he or we missed something.

I've attached a partial screen capture of the zone we use.  I came onsite long after some changes were made so I don't know if or when to clean up old name servers.  Any help would be appreciated.

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Greg Cobb
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Update:  I looked at the properties of that zone and the dns server wasn't set up as a name server.  So I added it there.  I haven't checked anything since the change.
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noci

Also be sure you only have ONE DHCP server if you added a new one, then disable the old one, otherwise it is a racing game who gets an address. (this will be won most probably by the new (presumably) faster server) but it might not be always the case.
DHCP is only running on one server.  The old server was powered off right after moving DNS from it to the other.
I looked in all the properties in DNS and found the new DNS server didn't have an IP, but said "unknown".  I corrected that much and now I can do a forward and reverse lookup from a command prompt.  I don't know if that resolved everything though but I'll reply again and update this post.
Your master server needs to be named in the SOA record.  (First element after SOA).
There needs to be NS records in the Zone for all DNS servers (Master/Slaves...)
For each of those servers there needs to be an IP address.
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