adding a second subnet to our existing domain.

Question

Our domain is running out of ip addresses, currently the ip address range is 192.168.1.0/24

I want to add 192.168.2.0/24 to this domain.

As far as i can tell, i have configured the router to route between the 2 subnets and added the relay agent.

So as far as i know that's all i need on the router side (we are using a cisco router/firewall)

What do i need to do to Active directory/Domain controller to make it recognize the new subnet.

I have read that i just need to go into

Active directory Sites and Services -> Click on subnets -> right click on Subnets -> click on new subnet -> enter my new subnet -> click on Default-First-Site-Name

and i am all done

What do i need to do to the DNS to server the resolved the ip addresses

i believe i just need to add the new scope to the DHCP server.

Please could someone assist me in these final stages.

Thanks

Dominic

Answer 1

Confirmed - from the AD perspective, you only need to add the subnet object and associate it with the appropriate site.

You might need to add another reverse lookup zone to DNS (assuming you have implemented reverse lookups). For details, refer to https://activedirectorypro.com/configure-dns-reverse-lookup-zones-ptr-records/

If you are using DHCP, then you'd need to create another DHCP scope. For details, refer to https://www.serverlab.ca/tutorials/windows/network-services-windows/step-step-creating-windows-server-dhcp-scope/

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hth

Marcin

Answer 2

is adding a second scope of ip addresses over a flat network advisable or should i be extending or adding a new vlan to the network instead of a new subnet.

i was told i could be making a big mistake in just adding a second scope.

thanks

Dominic