The two domains will not interfere with each other on the same network.
There will be no trust established between them unless you manually establish one.
Assign only one domain’s DNS servers via DHCP.
Can you have more than one DNS server on a network?
At a minimum, you’ll need two DNS servers for each Internet domain you have. You can have more than two for a domain but usually three is tops unless you have multiple server farms where you would want to distribute the DNS lookup load. It’s a good idea to have at least one of your DNS servers at a separate location.
How do I add a second domain controller?
Step 1: Install Active Directory Domain services (ADDS)
- Log into your Active Directory Server with administrative credentials.
- Open Server Manager → Roles Summary → Add roles and features.
- The “Before you begin” screen, which pops up next, is purely for an informational purpose.
- Select the installation type.
Why have a secondary domain controller?
The reason why businesses should invest in both a secondary Domain Controller and backups is simple. In addition to being able to restore a failed DC fast thanks to a reliable and recent backup, a secondary DC will be able to keep things running even when one has failed.
How many primary domain controllers are there?
As a rule of thumb, if you have 10 or less computers then a Workgroup is advised. Over 10 a Domain is recommended. Typically you would want two domain controllers, one acts as a back up and should be physically separate from the other, i.e. Don’t have both in the same VM Host.