Problems moving DHCP from 2008r2 to 2012r2

[edutech4schools]

I am trying and failing to move DHCP from 2008r2 to 2012r2 server.

 

I am trying to run this power shell script from the 2012r2 server, replacing win2k8r2-dhcp.corp.contoso.com with the 2008r2 server details.

 

Export-DhcpServer –ComputerName win2k8r2-dhcp.corp.contoso.com -Leases -File C:\export\dhcpexp.xml -verbose

 

But I am getting this error - the term 'export-dhcpserver' is not recognized as the name of the cmdlet.

 

Anyone got any advice.

[mowgli82]

not done it with powershell but here is the commands I use to export: netsh dhcp server \\ scope 192.168.1.0 dump> c:\dhcp.txt

 

to import : netsh exec c:\dhcp.txt

Edited March 24, 2015 by mowgli82

[Michael]

I use the above command too, via an Admin Command Prompt.

[edutech4schools]

Uninstalled DHCP role, re-installed and without needing to import again all scopes and leases are imported.

 

Odd, but that's Windows for you.

 

Cheers

[edutech4schools]

While I am at it I would like to change the starting IP for the DHCP addresses. Currently our leases start at *.*.*.16 but I would like it to start at 20 or 25. How do I make this change without killing everything.

[ADMaster]

You can just edit the properties of the scope via the dhcp MMC. If you have alot to change I use excel to concatenate the appropriate netsh commands, then copy and paste to elevated command prompt.

[DavePa]

Probably not the right way to do it but I replicated the old server settings to the new server but without authorising the new scope. I then simply unauthorised the old and authorised the new and bingo - job done. Nobody had any problems whatsoever.

[ADMaster]

Also don't forget to update the ip helper info on your router and wireless etc.