LANCOM WLC series
Chapter 3: Basic configuration
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If the access point is to retreive an IP address from a DHCP server but
the server is unobtainable, then an access point which is restarting
may not have an IP address, und thus be unable to communicate with
the WLAN Controller.
3.4
TCP/IP settings for Access Points
Please note the the Access Points needs a IP address to connect to the WLAN
Controller. The IP address may either be set up fixed in the Access Point or
assigned via DHCP server.
It the IP address is assigned via DHCP server and this server cannot be
reached, the Access Point has no IP address after restart and therefore
cannot connect to the WLAN Controller.
3.5
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 WLAN Controller 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.