unable to reserve or exlcude an ip address from the DHCP scope....

Question

_{Friday, January 29, 2010 9:22 PM}

my scope is 172.19.104.0\22

the start address is 172.19.104.50
to 172.19.106.254

This is how i had the scope setup on my windows 2003 Domain controller..

i setup a windows 2008 domain controller, and simply duplicated the reserved address from the old DHCP server to the New ..

and had issues adding the following address as reserved..  172.19.104.29  as reserved to the existing scope, but it returns an message, ... "the specified DHCP client is not a reserved client".....    I understand this address is not even a member of the scope i have setup , but this is how i had it setup on my 2003 server, and it worked....

just for the heck of it i tried to set this up as an exclusion, and received the following message: "the ip address is not a subset of the overall ip range... (which i really is not, but again, it worked in windows 2003 server.. is there a way around this?...

also, is there a way to verify that this dhcp server is AD integrated?....... the check box is no longer under the general tab of DHCP propterties, which im assuming, authorizing DHCP server now automatically makes it ad integrated true?.

thanks

r davis

Rob Davis

All replies (3)

_{Monday, February 1, 2010 3:53 AM ✅Answered}

Hello,

Thank you for your post here.

Yes, in Windows Server 2008 DHCP we cannot add reserved IP addresses that is not in the VLSM IP network. It is by design in the DHCP service on Windows Server 2008 and higher versions.

If you have any questions or concerns, please do not hesitate to let us know.

_{Saturday, January 30, 2010 1:37 AM}

  I guess they now check that the reserved address is actually covered by the scope.

   What exactly was the point of reserving 172.168.104.29 if it is outside the scope? What did you expect it to do?

  Bill

_{Saturday, January 30, 2010 4:33 AM}

I typed the wrong beginning scope addres...  it is 172.19.105.50 to 106.254

the reserved address is supposed to be for 2 visitors that show up to our office, and they just want to be able to plug in their computer and receive a certain ip address  that has less restrictive access for them to connect to thier outside company

I don't understand how this even worked in our previous  dhcp setup on windows 2003  

Rob Davis