Hi @NullDev
It looks like you want the 802.11ah to act as a trunk for your network. You’ll find that historically most wireless interfaces do not support 802.1q as the frame format doesn’t match 802.11.
I believe 802.11ak added some support - by way of 4 address support as well as adding the ethertype to the LLC/SNAP frame.
While we support 4 address mode , I don’t believe we have support for VLAN trunks like this, and my own configuration attempts directly with the wireless interface haven’t worked either. I am still confirming with the team though, so will get back to you on that 
There is a work around that is recommended by other threads online for other wireless cards, see for example:
Basically, those threads are recommending encapsulation of the ethernet frames. Instead of using GRE, the HaLowLinks come with B.A.T.M.A.N installed which can be used for encapsulating the trunked traffic.
I can confirm that using B.A.T.M.A.N to encapsulate the trunk does work as expected. In my test network, I had VLANs 1,2, and 3 - with 3 untagged at the port the HaLowLink was attached too, and 1,2 tagged. VLAN2 has no DHCP server running on it - hence the unmanaged setting throughout the config below.
My HaLowLink was connected to the network at the wan port, reserving lan and usblan for management.
Important snippets of the configuration are as below.
On the AP side:
# /etc/config/network
config device
option type 'bridge'
option name 'br-wan'
list ports 'bat0'
list ports 'wan'
config bridge-vlan
option device 'br-wan'
option vlan '3'
list ports 'bat0'
list ports 'wan:u*'
config bridge-vlan
option device 'br-wan'
option vlan '2'
list ports 'bat0:t'
list ports 'wan:t'
config bridge-vlan
option device 'br-wan'
option vlan '1'
list ports 'bat0:t'
list ports 'wan:t'
config interface 'vlan1'
option proto 'dhcp'
option device 'br-wan.1'
config interface 'vlan2'
option proto 'none'
option device 'br-wan.2'
config interface 'vlan3'
option proto 'dhcp'
option device 'br-wan.3'
config interface 'bat0'
option proto 'batadv'
option routing_algo 'BATMAN_IV'
option gw_mode 'off'
option hop_penalty '30'
config interface 'batman'
option proto 'batadv_hardif'
option master 'bat0'
# /etc/config/wireless
config wifi-iface 'wifinet6'
option device 'radio0'
option mode 'ap'
option ssid 'trunkedhalow'
option encryption 'sae'
option sae_pwe '1'
option key '<key>'
option network 'batman'
option wds '1'
And on the “Client” side:
# /etc/config/network
config device
option name 'br-wan'
option type 'bridge'
list ports 'bat0'
list ports 'wan'
config bridge-vlan
option device 'br-wan'
option vlan '3'
list ports 'bat0:u*'
list ports 'wan:u*'
config bridge-vlan
option device 'br-wan'
option vlan '2'
list ports 'bat0:t'
list ports 'wan:t'
config bridge-vlan
option device 'br-wan'
option vlan '1'
list ports 'bat0:t'
list ports 'wan:t'
config interface 'vlan2'
option proto 'none'
option device 'br-wan.2'
config interface 'vlan1'
option proto 'dhcp'
option device 'br-wan.1'
config interface 'vlan3'
option proto 'dhcp'
option device 'br-wan.3'
config interface 'bat0'
option proto 'batadv'
option routing_algo 'BATMAN_IV'
option gw_mode 'off'
option hop_penalty '30'
config interface 'batman'
option proto 'batadv_hardif'
option master 'bat0'
# /etc/config/wireless
# HaLow client
config wifi-iface 'wifinet2'
option device 'radio1'
option mode 'sta'
option network 'batman'
option ssid 'trunkedhalow'
option encryption 'sae'
option key '<key>'
option wds '1'
config wifi-iface 'wifinet3'
option device 'radio0'
option mode 'ap'
option ssid 'halowlink2-916f.1'
option encryption 'sae'
option hidden '1'
option key 'scale64spoke6zoom'
option network 'vlan1'
# 2.4 APs for VLAN access
config wifi-iface 'wifinet3'
option device 'radio0'
option mode 'ap'
option ssid 'halowlink2.1'
option encryption 'sae'
option hidden '1'
option key '<key>'
option network 'vlan1'
config wifi-iface 'wifinet4'
option device 'radio0'
option mode 'ap'
option ssid 'halowlink2.2'
option encryption 'sae'
option key '<key>'
option network 'vlan2'
config wifi-iface 'wifinet5'
option device 'radio0'
option mode 'ap'
option ssid 'halowlink2.3'
option encryption 'sae'
option key '<key>'
option network 'vlan3'
I built this configuration entirely from the Web UI as well
