Check this: http://blog.dc7ia.eu/picdat/Bildschirmfoto_2015-11-22_13-58-07.png

My /etc/config/network:

config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'

config globals 'globals'
option ula_prefix 'fdf2:8bf9:8ed3::/48'

config interface 'lan'
option force_link '1'
option type 'bridge'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option _orig_ifname 'eth0 wlan0'
option _orig_bridge 'true'
option ifname 'eth0'
option ipaddr '192.168.2.1'

config interface 'wan'
option ifname 'eth1'
option _orig_ifname 'eth1'
option _orig_bridge 'false'
option proto 'dhcp'

config interface 'wan6'
option ifname '@wan'
option proto 'dhcpv6'

config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'

config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0 1 2 3 4'

config interface 'hamnet'
option proto 'pptp'
option server 'ruhrlink.dyndns.org'
option auth 'pap'
option username 'dc7ia'
option defaultroute '0'
option demand '0'
option password 'password'

config route
option interface 'hamnet'
option target '44.0.0.0/8'
option metric '0'