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Home > Forums > MIS/IT > Operating Systems - Hardware Independent > Microsoft: Windows Server 2003 Forum

Global DHCP Server Changes?

thread931-1689375
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kythri (TechnicalUser)
27 Jul 12 12:28
We're looking at changing DNS IPs in our organization, and need to bulk-update a bunch of scopes for the new changes.

Any easy way to do this on a Windows 2003 DHCP Server, without touching each individual scope?
kythri (TechnicalUser)
31 Jul 12 14:55
Will changing options on the server propagate to all scopes underneath it?

Or is there a way to scriptomatically do this?
baddos (MIS)
1 Aug 12 11:17
If your DNS servers were configured via the server options, all you need to do is change it there. However, if you did put them in each scope you will need to modify each scope.
ADB100 (TechnicalUser)
1 Aug 12 12:37
What is a bit worrying is you are talking about pushing your ISPs DNS server IP addresses down to your clients. In a small (non-Domain) environment this might be fine but you are talking about a 'bunch of scopes' and this is in a Windows Server 2003 forum so I can only assume you are talking about an AD network here?
You 'should' be running your own DNS and forwarding to your ISPs servers from your own DNS servers....

Andy
kythri (TechnicalUser)
1 Aug 12 13:23
I've not mentioned ISP DNS at all. We're running our own DNS servers, and are migrating to new ones, so I need to update the scopes accordingly.

Unfortunately, I'm not finding an easy place to do this - the scopes options are automatically set when the scope is created, not manually configured, but when I look at "006 DNS Servers" under "Predefined Options and Values" the "Value" field says "none", not the auto-defined DNS servers.
kythri (TechnicalUser)
1 Aug 12 14:58
OK, so, poking around, I did find the "Server Options", and made changes there, but it did not propagate to all created scopes.

When we created these, we did not manually configure the DNS servers, we utilized what was in "Server Options".

Is there a way to push this change to all scopes?
kythri (TechnicalUser)
1 Aug 12 15:00
Nevermind, I refreshed, and this appears to have worked.
ADB100 (TechnicalUser)
1 Aug 12 15:10
Sorry I misread the 'DNS IPs' as 'ISP DNS' - maybe a mild form of dyslexia...

You can import and export DHCP scopes as text files so you could export them, edit them and then import them. I have worked with a few customers that have done this when we have made major IP changes in the network. Typically these are global settings (under Server Options) with maybe some specific settings one some DHCP scopes.

Andy
kythri (TechnicalUser)
1 Aug 12 16:33
Awesome, thanks! I'll give that a look too!
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