The DHCP resource allows a node in a cluster to run the DHCP service to lease IP address to DHCP clients on the network. If the node hosting the DHCP resource should fail, the resource can be moved and started on the other node and cause no interruption in IP address management on the network.
When you create a DHCP resource, you need to select the necessary dependencies (Physical Disk and IP Address). The New Resource wizard will also prompt you to configure specific DHCP Service parameters including the location of the DHCP database. The DHCP Database must be located on the disk represented by the Physical Disk resource you selected as a dependency. The values that appear on the DHCP Service Parameters window when creating the DHCP resource include:
- Database Path – This is the location of the DHCP database.
- Audit File Path – This is the location of the DHCP Audit Log.
- Backup Path – This is the location where the DHCP database is copied for backup purposes.
Once you create a DHCP resource, the DHCP service on the node will be modified to reflect the path changes described above. For example, the Database path will not be on a local drive, but rather a shared drive.
To ensure that the resource will function on another node in the event of failover, that node must also be running the DHCP service.
[tags]cluster node,ip address,new resource wizard,dhcp resource,database path[/tags]