Hey folks, I am using OpenWrt on a RaspberryPi (GoldenOrb from ofmodemsandmen, shouldn't make a difference) to be able to get a 4G connection (QMI). Since I only use mobile broadband as a backup I want my beefy core Firewall (pfSense with tons of rules vpns and stuff) to receive the Provider-IP by DHCP.

Right now the box is running as a Router, my 4G Interface looks like this:
config interface 'wwan'
    option ifname 'wwan0'
    option proto 'dhcp'

How can I bridge wwan0 to eth0 VLAN 2 (and don't pull an IP from the stick) and have the configuration interface on eth0 VLAN 1 ?

Thanks for your help.