Relay Bridge OPENWRT

Start with

opkg update
opkg install relayd
vi /etc/init.d/relayd enable /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 'fd37:7ec5:def1::/48'

config interface 'lan'
	option type 'bridge'
	option ifname 'eth1'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'
	option ip6assign '60'
	option gateway '10.0.0.1'

config interface 'wan'
	option ifname 'eth0'
	option proto 'dhcp'

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 'wwan'
	option proto 'static'
	option ipaddr '10.0.0.2' #IP WWAN match you main router network 192.168.x.254
	option netmask '255.255.255.0'
	option gateway '10.0.0.1' #your main router's IP

config interface 'stabridge'
option proto 'relay'
option network 'lan wwan'
option ipaddr '10.0.0.2' #Same IP as in WWAN

vi /etc/config/wireless

config wifi-device radio0
	option type mac80211
	option channel 11 	# Original channel of main router
	option hwmode 11g
	option path 'pci0000:00/0000:00:00.0'
	option htmode HT20
	option disabled 0

config wifi-iface
	option ssid chang_1 	# SSID of main router
	option encryption psk2	# Set wep, psk or psk2 for WEP, WPA or WPA2
	option device radio0
	option mode sta
	option network wwan
	option key lechangue	# Main router password

config wifi-iface
	option device radio0
	option mode ap
	option ssid chang_2	# SSID of repeater router
	option encryption psk
	option key lechangue	# Repeater router password
	option network lan

vi /etc/config/dhcp

config dhcp lan
	option interface lan
	option start 100
	option limit 150
	option leasetime 12h
	option ignore 1

config dhcp wan
	option interface wan
	option ignore 1

Stop firewall:

/etc/init.d/firewall stop
/etc/init.d/firewall disable