Master WDS peer (/etc/config/wireless)

config 'wifi-iface'
	option 'device' 'radio0'
	option 'network' 'lan'
	option 'mode' 'ap'
	option 'ssid' 'MY WDS SSID'
	option 'wds' '1'
	option 'encryption' 'psk2'
	option 'key' 'AAAAAAAAAA'

'others' WDS peer (/etc/config/wireless)

config 'wifi-iface'
	option 'device' 'radio0'
	option 'ssid' 'MY WDS SSID'
	option 'mode' 'sta'
	option 'wds' '1'
	option 'network' 'lan'
	option 'encryption' 'psk2'
	option 'key' 'AAAAAAAAAA'

config 'wifi-iface'
	option 'device' 'radio0'
	option 'network' 'lan'
	option 'mode' 'ap'
	option 'ssid' 'MY WDS SSID OR ANOTHER ONE'
	option 'encryption' 'psk2'
	option 'key' 'AAAAAAAAAA or BBBBBBBBBBB'
	option 'wds' '1' # optional, only if you want this wds peer to be a reapeter