Start-address-pool
The IP address assigned is taken from the address pool selected ('Start-address-pool' to 'End-address-pool'). Any valid addresses in the local network can be entered here.
If 0.0.0.0 is entered instead, the device will determine the appropriate addresses (start or end) from the settings under 'Setup/TCP module'. The procedure is as follows:
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If only the IP address or only the Intranet address is entered, the start or end of the pool is determined by means of the associated network mask.
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If both addresses have been specified, the Intranet address has priority for determining the pool.
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If only the cable or LAN-IP address is entered, the start or end of the pool is determined by means of the associated network mask.
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If both addresses have been specified, the LAN-IP address has priority for determining the pool.
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The start address of the pool is either the address given in the DHCP module or the first valid address in the local network.
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The end address of the pool is either the address given in the DHCP module or the last valid address in the local network.
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A valid address is then taken from the pool for the IP address. If the computer was already assigned an IP address at some point in the past, it requests this same address and the DHCP server attempts to reassign it this address if it has not already been assigned to another computer.
The DHCP server also checks whether the address that is to be assigned to the computer is unique in the local network. It does this by issuing an ARP request to the address. If the ARP request is answered, the DHCP server begins the procedure again with a new address. As soon as the uniqueness of an address has been established, the requesting computer is assigned the address found.