LANCOM WLC
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4006 - LANCOM WLC
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4025
Chapter 4: Configuring the WLAN Controller
44
EN
4.1.1
Setting the time on the LANCOM WLAN Controller
The management of Access Points in a WLAN infrastructure is based upon the
automatic distribution of certificates via the Simple Certificate Enrolement
Protocol (SCEP).
For further information on SCEP refer to the LCOS reference manual.
The LANCOM WLAN Controller can only check the temporal validity of these
certificates if it is set with the current time. If the time is not set in the WLAN
Controller, the WLAN LED illuminates in red and the device is not operational.
To set the time in the device start LANconfig, click on the entry for the WLAN
Controller with the right-hand mouse key and select 'Set date/time' from the
context menu. Alternatively, use WEBconfig and click on the link 'Set date and
time' at the lower edge of the browser window.
Alternatively, LANCOM WLAN Controllers can automatically retrieve
the current time from a time server by means of the Network Time Pro-
tocol (NTP). Information on NTP and its configuration can be found in
the LCOS reference manual.
As soon as the WLAN Controller has valid time information it begins with the
generation of the certificates (root and device certificate) and it determines a
random number. Once the random number and the necessary certificates have
been generated, the LANCOM WLAN Controller indicates that it is operational
and the WLAN LED blinks red.
The WLAN Controller should be connected to the LAN in order to gen-
erate random numbers that are cryptographically sound. Depending
on the network constellation, it may take a few minutes for the ran-
dom number to be generated. Random numbers only have to be gen-
erated if the device was switched on and off a number of times,
otherwise there should be sufficient random numbers in memory.
Once operational, you should make a backup copy of the certificates
(’Backing up the certificates’
Page 65).
4.1.2
Generating a default configuration
With the time information and the certificates, the LANCOM WLAN Controller
is ready for operations. If the LAN contains Access Points in managed mode