Change to the DirectoryServer-base\ds6\bin directory.
cd DirectoryServer-base\ds6\bin
Create a Directory Server instance.
dsadm.exe create -p port-no -P ssl-port-no instance-path
Start the instance.
dsadm.exe start instance-path
Create a root suffix with corresponding domain components.
dsconf.exe create-suffix --unsecured -p port-no root-suffix