Draytek Vigor2920 Series User Manual page 273

Available settings are explained as follows:
Item
Scan
Statistics
Add to
Description
It is used to discover all the connected AP. The results will be
shown on the box above this button.
It displays the statistics for the channels used by APs.
If you want the found AP applying the WDS settings, please
type in the AP's MAC address on the bottom of the page and
click Bridge or Repeater. Next, click Add to. Later, the MAC
address of the AP will be added to Bridge or Repeater field of
WDS settings page.
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Vigor2920 Series User's Guide