Basic explanation of what the Routed AP mode is and the configuration of RB in Routed AP mode is given here. Configuration specific to our network is given below.
File: /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 interface 'lan'
	option ifname 'eth0'
	option proto 'static'
	option ipaddr '10.0.1.1'
	option netmask '255.255.255.0'
	#option gateway ''
	option dns '8.8.8.8'
	
config interface 'wan'
	option proto 'static'
	option ipaddr '192.168.1.6'
	option netmask '255.255.255.0'
	option gateway '192.168.1.1'

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

config switch_vlan
	option device 'switch0'
	option vlan '1'
	option ports '1 2 5'

Here, it is assumed that the IP addresses are assigned in a static manner. If a DHCP server can lease IP addresses to the RB, then replace 'option proto static' with 'option proto dhcp' and delete (or comment) the next three lines.

File: /etc/config/wireless

config wifi-device  radio0
	option type     mac80211
	option channel  1
	option hwmode	11g
	option path	'pci0000:00/0000:00:14.0'

	# REMOVE THIS LINE TO ENABLE WIFI:
	# option disabled 1

config wifi-iface
	option device   radio0
	option network  wan
	option mode     sta
	option ssid     IITB-TVWS
	option encryption none

File: /etc/config/dhcp

config dnsmasq
	option domainneeded	1
	option boguspriv	1
	option filterwin2k	0  # enable for dial on demand
	option localise_queries	1
	option rebind_protection 1  # disable if upstream must serve RFC1918 addresses
	option rebind_localhost 1  # enable for RBL checking and similar services
	#list rebind_domain example.lan  # whitelist RFC1918 responses for domains
	option local	'/lan/'
	option domain	'lan'
	option expandhosts	1
	option nonegcache	0
	option authoritative	1
	option readethers	1
	option leasefile	'/tmp/dhcp.leases'
	option resolvfile	'/tmp/resolv.conf.auto'
	#list server		'/mycompany.local/1.2.3.4'
	#option nonwildcard	1
	#list interface		br-lan
	#list notinterface	lo
	#list bogusnxdomain     '64.94.110.11'

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

File: /etc/config/firewall

config defaults
	option syn_flood '1'
	option input 'ACCEPT'
	option output 'ACCEPT'
	option forward 'REJECT'

config zone
	option name 'lan'
	list network 'lan'
	option input 'ACCEPT'
	option output 'ACCEPT'
	option forward 'REJECT'
	option masq '0'

config zone
	option name 'wan'
	list network 'wan'
	list network 'wan6'
	option input 'ACCEPT'
	option output 'ACCEPT'
	option forward 'REJECT'
	option mtu_fix '1'
	option masq '1'

config forwarding
	option src 'lan'
	option dest 'wan'

config forwarding
	option src 'wan'
	option dest 'lan'

config rule
	option name 'Allow-DHCP-Renew'
	option src 'wan'
	option proto 'udp'
	option dest_port '68'
	option target 'ACCEPT'
	option family 'ipv4'

config rule
	option name 'Allow-Ping'
	option src 'wan'
	option proto 'icmp'
	option icmp_type 'echo-request'
	option family 'ipv4'
	option target 'ACCEPT'

config rule
	option name 'Allow-DHCPv6'
	option src 'wan'
	option proto 'udp'
	option src_ip 'fe80::/10'
	option src_port '547'
	option dest_ip 'fe80::/10'
	option dest_port '546'
	option family 'ipv6'
	option target 'ACCEPT'

config rule
	option name 'Allow-ICMPv6-Input'
	option src 'wan'
	option proto 'icmp'
	list icmp_type 'echo-request'
	list icmp_type 'echo-reply'
	list icmp_type 'destination-unreachable'
	list icmp_type 'packet-too-big'
	list icmp_type 'time-exceeded'
	list icmp_type 'bad-header'
	list icmp_type 'unknown-header-type'
	list icmp_type 'router-solicitation'
	list icmp_type 'neighbour-solicitation'
	list icmp_type 'router-advertisement'
	list icmp_type 'neighbour-advertisement'
	option limit '1000/sec'
	option family 'ipv6'
	option target 'ACCEPT'

config rule
	option name 'Allow-ICMPv6-Forward'
	option src 'wan'
	option dest '*'
	option proto 'icmp'
	list icmp_type 'echo-request'
	list icmp_type 'echo-reply'
	list icmp_type 'destination-unreachable'
	list icmp_type 'packet-too-big'
	list icmp_type 'time-exceeded'
	list icmp_type 'bad-header'
	list icmp_type 'unknown-header-type'
	option limit '1000/sec'
	option family 'ipv6'
	option target 'ACCEPT'

config include
	option path '/etc/firewall.user'

Page maintained by Gaurang Naik.