Automatic IP with DHCP!! Automatic allocation [treatment] by the automatic allocation an area is defined in the DHCP server by IP addresses (IP rank). If the address from this area was assigned once to a DHCP client, she belongs to this indefinitely, because also here the assigned IP address is bound to the MAC address. If the address area is completely awarded, no additional clients can integrate themselves into the net. This does not go also if the calculators are not (switched on) at all actively, because in the Cache of the DHCP server the IP address is stored. Then there helps only one extinguishing of the Caches to be able to use the addresses awarded near not active calculators.
karl-hein :ja:emoticon-0132-envy::emoticon-0179-headb