In LANconfig you access the DFS settings under , then click Physical WLAN settings and select the Radio tab.
- Time of DFS rescan
- This entry determines at what time (0 - 24h) the device deletes the DFS database and performs a DFS rescan. If this item is left empty, the device only performs a DFS rescan when no further free channel is available. This is the case when the number of channels determined during the initial DFS scan falls below the minimum number of free channels.
Tip: The cron command options can be used to define the time: The entry '1,6,13' starts the rescan at 01:00h, 06:00h and 13:00h. The entry ' 0-23/4 ' starts a rescan every four hours between 00:00h and 23:00h.
- Number of channels to scan
- This entry determines the minimum number of free channels that a DFS scan has to achieve. The default value of '2' means that the device performs a DFS scan for as long as it takes to detect 2 free channels. If the device has to switch channels, for example if it detects an active radar pattern, the second channel is immediately available for the change. A value of '0' disables the restriction. The physical WLAN interface performs a DFS scan on all available channels.
- Rescan free channels
- With this item you select whether, following the completion of a DFS rescan, the physical WLAN interface deletes occupied channels or saves them for subsequent DFS rescans.
- Yes: The physical WLAN interface deletes occupied channels after completing a DFS rescan so that they are available again for a new DFS rescan.
- No: The device saves occupied channels after completing a DFS rescan and so that the device immediately skips them during a new DFS rescan.