LANCOM WLC series
Chapter 4: Configuring the WLAN Controller
86
EN
After installing a new certificate list, expired certificates are removed
and a new CRL is created. Furthermore, the CA reinitializes itself auto-
matically if certificates and keys are successfully extracted after load-
ing the certificate backup.
4.3.5
LANCOM WLAN Controller backup
LANCOM WLAN Controllers manage a large number of Access Points, which
in turn may have a large number of WLAN clients associated with them. WLAN
Controllers thus play a crucial role in the functioning of the entire WLAN infra-
structure—for which reason the organization of a backup solution in case of
temporary WLAN Controller failure is in many cases indispensable.
In case of a backup event, a managed Access Point should connect to an alter-
native WLAN Controller. Because this connection will only function if the cer-
tificate in the Access Point has been authorized by the backup controller, it is
essential that all WLAN Controllers sharing a backup solution have identical
root certificates.
To achieve this, generate a backup certificate on one of the WLAN
Controllers and upload this to all of the other WLAN Controllers (also see
’Backing up the certificates’
→
page 82).
All of the WLAN Controllers should be set with same time information to
ensure that checks on the certificate validity period all produce the same
result.