Been searching the forums to similar topics and this is very close to what I am trying to do:
In my case, I need the WAN port as tagged VLAN 35.
Below is my config so far (missing the VLAN part):
config device
option name 'wan'
option macaddr 'xx:xx:xx:xx:xx:xx'
config interface 'wan'
option device 'wan'
option proto 'dhcp'
option peerdns '0'
list dns '192.168.1.3'
config interface 'wan6'
option device 'wan'
option proto 'dhcpv6'
option reqaddress 'try'
option reqprefix 'auto'
option peerdns '0'
list dns '192.168.1.3'
The thread above suggests that I need to specify option device 'eth1.35' in the wan section but I am not clear if anything else is needed. I would like to have some validation before I try again as I end up having to revert to 19.07 each time I am unsuccessful in restoring internet connectivity under 20.02.