IP pools
A DHCP server is configured with IP pools. The server is then instructed to use IP addresses falling into the specified range of IP while offering leases. Multiple IP pools are configured to not have duplicate or overlapping IP subnets. You can also configure a DHCP server with multiple IP ranges within an IP subnet; this confines the allocatable IP addresses within the configured IP pool.
An IP pool will be claimed valid only if it is
either:
Dynamic pool – Has a network address, subnet mask and IP range(s)
Static pool – Should have a static IP-to-MAC binding.
The DHCP server will discard the invalid and incomplete pools and will only operate on the valid IP pools. The DHCP server will require at least one valid pool to start.