LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 3: Basic configuration
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3.4
TCP/IP settings for PC workstations
It is extremely important to assign the correct addresses to all of the devices
in the LAN. Also, all of these computers must know the IP addresses of two
central stations in the LAN:
Standard gateway – receives all packets which are not addressed to com-
puters in the local network
DNS server – translates network and computer names into their actual IP
addresses.
The LANCOM VoIP Router can fulfill the functions of a standard gateway and
also of a DNS server. It can also operate as a DHCP server, which automatically
assigns IP addresses to all of the computers in the LAN.
The correct TCP/IP configuration of a PC in the LAN depends essentially on the
method used for assigning IP addresses in the LAN:
IP address allocation by a LANCOM
In this operating mode, a LANCOM uses DHCP to allocate not only an IP
address to each PC in the LAN and WLAN (for devices with a radio mod-
ule), but it also communicates its own IP address as the standard gateway
and DNS server. For this reason, the PCs have to be set up to automatically
retrieve their own IP address and those of the standard gateway and DNS
server via DHCP.
IP address allocation by a separate DHCP server
For this reason, the workstation PCs have to be set up to automatically
retrieve their own IP address and those of the standard gateway and DNS
server via DHCP. The DHCP server is to be programmed such that the IP
address of the LANCOM is communicated to the PCs in the LAN as the
standard gateway. The DHCP server should also communicate that the
LANCOM is the DNS server.
Manual IP address assignment
If IP addresses in a network are statically assigned, then the IP address of
the LANCOM is to be set as the standard gateway and DNS server in the
TCP/IP configuration of each PC in the LAN.
Further information and help on the TCP/IP settings for your LANCOM
VoIP Router is available in the Reference Manual. For information on
the network configuration of workstation PCs, refer to the documen-
tation for the installed operating system.
