hostapd-rtl8188/hostapd/hostapd.vlan

# VLAN ID to network interface mapping
1	vlan1
2	vlan2
3	vlan3
100	guest
# Optional wildcard entry matching all VLAN IDs. The first # in the interface
# name will be replaced with the VLAN ID. The network interfaces are created
# (and removed) dynamically based on the use.
*	vlan#