Tcp/Ip Settings To Workstation Pcs - Lancom 1751 UMTS Manual

110584_LC-1751-UMTS-MANUAL-EN.book Page 35 Tuesday, February 26, 2008 5:16 PM
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TCP/IP settings to workstation PCs

The correct addressing of all devices within a LAN is extremely important for
TCP/IP networks. In addition, all computers must know the IP addresses of two
central points in the LAN:
The LANCOM can perform the functions of both a default gateway and a DNS
server. In addition, as a DHCP server it can also automatically assign valid IP
addresses to all of the computers in the LAN.
The correct TCP/IP configuration of the PCs in the LAN depends on the method
used to assign IP addresses within the LAN:

Default gateway – receives all packets that are not addressed to compu-
ters within the local network.
DNS server – translates network names (www.lancom.de) or names of
computers (www.lancom.de) to actual IP addresses.
IP address assignment via the LANCOM (default)
In this operating mode the LANCOM not only assigns IP addresses to the
PCs in the LAN, it also uses DHCP to specify its own IP address as that of
the default gateway and DNS server. The PCs must therefore be configu-
red so that they automatically obtain their own IP address and the IP
addresses of the standard gateway and DNS server (via DHCP).
IP address assignment via a separate DHCP server
The workstation PCs must be configured so that they automatically obtain
their own IP address and the IP addresses of the standard gateway and
DNS server (via DHCP). The IP address of the LANCOM must be stored on
the DHCP server so that the DHCP server transmits it to the PCs in the LAN
as the standard gateway. In addition, the DHCP server should also specify
the LANCOM as a DNS server.
Manual IP address assignment
If the IP addresses in the network are assigned static ally, then for each PC
the IP address of the LANCOM must be set in the TCP/IP configuration as
the standard gateway and as a DNS server.
For further information and help on the TCP/IP settings of your
LANCOM, please see the reference manual. For more information on
the network configuration of the workstation computers, please refer
to the documentation of your operating system.
LANCOM 1751 UMTS
Chapter 3: Basic configuration
35