Advanced 802.1q protocol management for DSA switch

Installing and Using OpenWrt Network and Wireless Configuration
10

that does not achieve setting a specific VID with untag state, e.g. with swconfig

config switch_vlan
	option device 'switch0'
	option vlan '3'
	option ports '5t 2'
	option vid '3'

You get port 2 with VID 3 in untag state (neglect 5t since that being a CPU port and not applicable with DSA)