ELSA LANCOM Wireless L-2 Manuel De L'utilisateur page 87

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.
Netmask
The network mask is assigned in the same way as the address:
The system either assigns the network mask entered in the DHCP module or uses the
network mask that belongs to the local network (determined during address assignment).
Broadcast The broadcast mask is assigned in the same way as the address:
The system either assigns the broadcast address entered in the DHCP module or uses the
broadcast address that belongs to the local network (determined during address
assignment).
Max.-lease- Here you can enter the maximum period of validity that the DHCP server assigns a host.
time-minute(s)
The DEFAULT value of 6000 minutes equals approximately 4 days.
Default-lease- Here you can enter the period of validity that is assigned if the host makes no request.
time-minute(s)
The DEFAULT value of 500 minutes equals approximately 8 hours.
Table-DHCP In the DHCP module, the 'Table-DHCP' option allows you to verify (or look up) the
assignment of IP addresses to the relevant computers. This table has the following
layout:
IP-address
10.1.1.10
IP-address: IP address assigned
MAC-address: Computer's Ethernet address
Timeout: Time remaining until the assignment becomes invalid
Hostname: Computer's name in plain text if it was transmitted in the request
Type: This field contains additional information on the assignment.
The 'Type' field specifies how the address was assigned. This field can assume the
following values:
– new: The computer has made its initial request. The DHCP server verifies the
MAC-address
00a0570308e1
uniqueness of the address that is to be assigned to the computer.
Description of the menu options
Timeout Hostname
500 ELSA
Type
new
ELSA LANCOM Wireless
R35