DNS effect on changing IP addressing scheme



Hello Everyone,

I am working on a network where I need to change the IP addressing
scheme from a 172.16.x.x network to a 10.x.x.x network. We are using
Windows Server 2003 Active Directory DNS and have about 600 users with
about 45 servers. What all do I need to be concerned with as far as
DNS. Will everything just re-register with the DNS server
automatically or do I need to do some configuration on the DNS
Thank You,


Meinolf Weber [MVP-DS]

Hello Larry,

Start with the DCs with DNS installed, change the ip address, run ipconfig
/flushdns and ipconfig /registerdns, then reboot or restart the netlogon
service. After that check DNS zones for the new correct settings. Then go
on with member servers and assuming that you use DHCP reconfigure the scope
options. You should do this if possible at close of business times.

Best regards

Meinolf Weber
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DC's will re-register its dynamic records into DNS database, I have done
similar projects with no issues, you may have to bounce some of the domain
controllers couple times to get it going, apart from that don't forget to
change your DHCP scope, all static IP configurations and certainly fallow
the Meinolf recommendation taking care of your DC/DNS servers first
otherwise servers who's IP got changed will go nuts.
I would check name servers on DNS to make sure correct IP address is
reflecting for each DC/DNS servers as well and make sure there is no static
configuration ( hosts file or application hard coded IP to the DNS server in
the environment)
good luck

oz Casey Dedeal,

MVP (Exchange)
MCSE 2003, M+, S+, MCDST
Security+, Project +, Server +

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