I have recently purchased an TP-Link Archer C6 and I have installed OpenWrt 21 in the router. After a few days of trail and error I have succesfully achived to make it work.
The my setup is as follow: I have set my ISP router as a bridge and I have linked both routers with an ethernet cable. My route quickly gets an dynamic IP from my ISP. However, the internet connection is not very reliable since I have installed the new router, sometimes I completly lose the connectio. I know the problem comes from outside because I ping 8.8.8.8 and it donsn't replay. I don't know what information I should give you in order to receive help but I have seen other posts and it seems usual to provide information about the interfaces, so here they are:
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|__| W I R E L E S S F R E E D O M
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OpenWrt 21.02.1, r16325-88151b8303
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root@OpenWrt:~# cat /etc/config/network
config interface 'loopback'
option device 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fdde:d599:a9b8::/48'
config device
option name 'br-lan'
option type 'bridge'
list ports 'eth0.1'
config interface 'lan'
option device 'br-lan'
option proto 'static'
option ipaddr '192.168.1.1'
option netmask '255.255.255.0'
option ip6assign '60'
config interface 'wan'
option proto 'dhcp'
option device 'eth0.20'
option peerdns '0'
list dns '8.8.8.8'
list dns '8.8.4.4'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0t 2 3 4 5'
option vid '1'
config switch_vlan
option device 'switch0'
option vlan '2'
option ports '0t 1'
option vid '2'
config switch_vlan
option device 'switch0'
option vlan '3'
option ports '0t 1t'
Thanks in advance for the help