Hey There, I think there is a bug with static routing. I have another router cascaded with the TPLINK AX20, when i setup static routing to the second router everything sims to work just fine but after some time short time (20-30 seconds) long running connections like SSH or WebSockets are dropped. 

 

Here is my setup 

 

1. Internet router, 
    wan connected to internet

    local ip 192.168.0.1 
    lan 192.168.0.0/24

 

2. Tp link Wireless router  AX20

    wan connected to Router 1 (via LAN cable) and wan ip address 192.168.0.2

    local ip 192.168.1.1, gateway 192.168.0.1, dns 192.168.0.1
    lan 192.168.1.0/24 (all wireless devices connected to this network)

3. IOT wireless router 

    wan connected to Router 2 (via LAN cable) and wan ip address 192.168.1.2

    local ip 192.168.2.1, gateway 192.168.1.1, dns 192.168.1.1

    lan 192.168.2.0/24 (all iot devices connected to this network)

 

I have setup a static routing from Router #2 (TPLINK Archer AX20) to Router #3 like this:

    network: 192.168.2.0
    subnet 255.255.255.0

    gatewah: 192.168.1.2

    interface: LAN

 

The routing table on the archer AX20 looks like this: 

 

#1	0.0.0.0	0.0.0.0	192.168.0.1	WAN
#2	192.168.2.0	255.255.255.0	192.168.1.2	LAN
#3	192.168.1.0	255.255.255.0	0.0.0.0	LAN
#4	192.168.1.2	255.255.255.255	0.0.0.0	LAN
#5	192.168.0.0	255.255.255.0	0.0.0.0	WAN

    

Routes #1, #3 and #5 where automatically created by the initial setup of the router
Routes #2 and #4 were generated when i created the static route. 

 

All devices connected to Router#2 have no problem accessing internet
All devices connected to Router#3 have no problem accessing internet

All devices from Router #3 have no problem accessing devices on Router #2
Devices from Router #2 (TPLINK Archer AX20) can make a connection to devices on Router #3 but after some time the connections dropout. This is especially noticable on long runing connections like Websockets, SSH and so on. 

Tried to change the cable between Router#2 and Router#3 and that does not fix the problem. 
Tried to substitute the Archer AX20 with another older b/g/n router and everything works fine. So it looks like the Archer AX20 has a problem with static routing not working as expected. 

 

Also to point out that when i tested with another router, the Route #4 was not automatically generated, i doubt that this route is the issue but it worked and the routing table looked like this: 
 

#1	0.0.0.0	0.0.0.0	192.168.0.1	WAN
#2	192.168.2.0	255.255.255.0	192.168.1.2	LAN
#3	192.168.1.0	255.255.255.0	0.0.0.0	LAN
#4	192.168.0.0	255.255.255.0	0.0.0.0	WAN