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̈ Chapter 13: Server services for the LAN LANCOM Reference Manual LCOS 3.50
277
Server services for the LAN
Checking of IP addresses in the LAN
The DHCP table provides a list of the IP addresses in the LAN. This table con-
tains the assigned or used 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'
The computer has made its initial request. The DHCP server verifies the
uniqueness of the address that is to be assigned to the computer.
̈ 'unknown'
While verifying uniqueness, it was determined that the address has
already been assigned to another computer. Unfortunately, the DHCP
server has no means of obtaining additional information on this compu-
ter.
̈ 'static'
A computer has informed the DHCP server that it has a fixed IP address.
This address can no longer be used.
̈ 'dynamic'
The DHCP server assigned the computer an address.
13.2 DNS
The domain name service (DNS) is responsible in TCP/IP networks for associ-
ating computer names and/or network (domains) and IP addresses. This serv-
ice is required for Internet communications, to return the correct IP address
for a request such as 'www.lancom.de' for example. However, it's also useful
to be able to clearly associate IP addresses to computer names within a local
network or in a LAN interconnection.
13.2.1 What does a DNS server do?
The names used in DNS server requests are made up of several parts: one part
consists of the actual name of the host or service to be addressed; another
Configuration tool Run/Table
WEBconfig
Expert Configuration Setup / DHCP-module
Table- DHCP
Terminal/Telnet
setup/DHCP-module/table-DHCP