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In a scenario like this, having at least one additional WLAN controller for redundancy is an advantage. You can configure load balancing so that the access points are distributed between the WLAN controllers. Furthermore, one WLAN controller can be configured as a standby unit, so that if a problem occurs, the access points connect to the second standby WLAN controller as soon as the first one fails.
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A change of WLAN controller interrupts all ongoing sessions (when operating as a gateway). These have to be reestablished by the end devices. In particular when operating as a Public Spot, please note that the user information, such as the accrued online time, is not transferred to other WLAN controllers. The online time for Public Spot users basically begins anew. - When using this Clustering solution no configuration synchronisation is done by the WLAN Controllers (HA Cluster). To synchronize the configuration the LANCOM High Availability Clustering Option is needed on both WLAN Controllers. Informations regarding the configuration of such a scenario can be found in the LCOS Reference Manual.
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Requirements:
- LCOS as of version 9.0 (download latest Version)
- LANtools as of version 9.0 (download latest Version)
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