Operating modes and functions
ELSA MicroLink Cable
44
For each request, a host can ask for a specific period of validity. However, a DHCP server
can also assign the host a period of validity that differs from what it requested. The
DHCP module provides two settings for influencing the period of validity:
Maximum lease time in minutes
Here you can enter the maximum period of validity that the DHCP server assigns a
host.
If a host requests a validity in excess of 6000 minutes, this will nevertheless be the
maximum available validity!
The default setting is 6000 minutes (approx. 4 days).
Default lease time in minutes
Here you can enter the period of validity that is assigned if the host makes no
request. The default setting is 500 minutes (approx. 8 hours).
Priority for the DHCP server – Request assignment
In the default configuration, almost all the settings in the Windows network environment
are selected in such a way that the necessary parameters are requested via DHCP. Check
the settings by clicking Start ̈ Settings ̈ Control Panel ̈ Network. Select the
'TCP/IP' entry for your network adapter and open Properties.
Check the various tabs for special entries, such as for the IP address or the standard
gateway. If you would like all of the values to be assigned by the DHCP server, simply
delete the corresponding entries.
Priority for a workstation—overwriting an assignment
If a computer uses parameters other than those assigned to it (e.g. a different default
gateway), these parameters must be set directly on the workstation computer. The
computer then ignores the corresponding parameters assigned to it by the DHCP server.
Under Windows, this can, for example, be performed via the properties of the network
environment.
Click Start ̈ Settings ̈ Control Panel ̈ Network. Select the 'TCP/IP' entry for
your network adapter and open Properties.
You can now enter the desired values by selecting the various tabs.
The assignment of IP addresses to the various computers can be checked using the
'Setup/DHCP/Table-DHCP' item in the router's DHCP module. This table contains the
assigned IP address, the MAC address, the validity, the name of the computer (if
available) and the type of address assignment.
The 'Type' field specifies how the address was assigned. This field can assume the
following values:
new