CHANNEL INDICATION SENDING METHOD, CHANNEL SCANNING METHOD, AND DEVICE

A channel indication sending method, a channel scanning method, and an apparatus are disclosed. The sending method includes: A first access point receives channel information from a second access point, where the channel information indicates that an operating channel of the second access point is a first channel, and whether the second access point successfully performs channel availability check (CAC) on the first channel, and the first channel is a dynamic frequency selection (DFS) channel. The first access point sends, on a second channel, a WLAN frame to a station associated with the first access point, where the WLAN frame includes an indication about the first channel and an indication of whether the second access point successfully performs the CAC on the first channel. In this method, the first access point sends, to the station associated with the first access point, the indication of whether the CAC succeeds. In this case, the station switches, only after determining that the second access point successfully performs the CAC, to the DFS channel on which the second access point is located. This ensures a success rate of scanning the switched-to DFS channel by the station.