Unresponsive after a while

Installing and Using OpenWrt Network and Wireless Configuration
1

Hi,
I have an Asus RT AC51U running the snapshot r6422-87606e25af.

I have noticed that the router becomes unresponsive after a while. I havent noticed any patterns as to how long it takes to come to this state, but it happens atleast once every day.
The SSID is broadcasted even in this state, but it stops accepting new connections, and the connected clients are unable to access luci or any other sites. Even a ping to the router doesnt work. I have to turn it off and back on for it to come back alive. looking at the system logs, there is nothing to indicate any error or anything at all during that time. The logs always start from the time i rebooted the system

I dont know why this happens - any pointers as to what I could do?

/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 'fdb9:1fe1:2d22::/48'

config interface 'wan'
	option proto 'dhcp'
	option _orig_ifname 'eth0.1'
	option _orig_bridge 'false'

config device 'wan_dev'
	option name 'eth0.1'
	option macaddr '60:45:cb:94:dc:39'

config interface 'wan6'
	option ifname 'eth0.1'
	option proto 'dhcpv6'

config interface 'lan'
	option type 'bridge'
	option proto 'static'
	option netmask '255.255.255.0'
	option ip6assign '60'
	option ipaddr '192.168.2.1'
	option _orig_ifname 'eth0.2'
	option _orig_bridge 'true'
	option ifname 'eth0.2'

config device 'lan_dev'
	option name 'eth0.2'
	option macaddr '60:45:cb:94:dc:38'

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

config switch_vlan
	option device 'switch0'
	option vlan '1'
	option ports '0 6t'

config switch_vlan
	option device 'switch0'
	option vlan '2'
	option ports '1 2 3 4 6t'

config interface 'wwan'
	option proto 'dhcp'
	option type 'bridge'
	option _orig_ifname 'wlan0'
	option _orig_bridge 'true'
	option ifname 'br-wlan2 eth0 radio0'

this is my /etc/config/dhcp

option resolvfile '/tmp/resolv.conf.auto'
        option nonwildcard '1'
        option localservice '1'

config dhcp 'lan'
        option interface 'lan'
        option start '100'
        option limit '150'
        option leasetime '12h'
        option dhcpv6 'server'
        option ra 'server'
        option ra_management '1'

config dhcp 'wan'
        option interface 'wan'
        option ignore '1'

config odhcpd 'odhcpd'
        option maindhcp '0'
        option leasefile '/tmp/hosts/odhcpd'
        option leasetrigger '/usr/sbin/odhcpd-update'
        option loglevel '4'

/etc/config/wireless

config wifi-device 'radio0'
	option type 'mac80211'
	option hwmode '11g'
	option path 'platform/10180000.wmac'
	option htmode 'HT20'
	option disabled '0'
	option channel '13'
	option country 'GB'
	option legacy_rates '0'

config wifi-iface
	option device 'radio0'
	option mode 'sta'
	option encryption 'psk2'
	option network 'wan'
	option ssid 'WiFi1'
	option key 'xxxxxx'

config wifi-iface
	option device 'radio0'
	option mode 'ap'
	option network 'lan'
	option encryption 'psk2'
	option ssid 'WiFi2'
	option key 'xxxxx'