@ykzamorpheus 

Do you mean your WAN2 is disconnected and you need to re-plug the cable to make it work?

If so, you can check if you set Link Backup or any other function. Link Backup will make your backup WAN down and only work when primary WAN down.

I explained myself wrong.

tplink does not detect my wan2 my ISP is connected to wan2 and nevertheless tplink does not detect it.

and my ISP works because if I connect a computer it gives me an IP address, submask, gateway and DNS.

check the attached image, delete wan1 for security but see how it stays connected in wan2 and never detects the connection.

the router located in wan 2 is the master model TG2492LG-MAS

@ykzamorpheus 

morpheus 

@ykzamorpheus this might help you: https://community.tp-link.com/en/business/forum/topic/176920

@ykzamorpheus 

Firstly, make sure you did not use link backup function. Then you can try to exchange the cable for WAN1 and WAN2. Check if the problem only happens on WAN2.

And you can try to upgrade the firmware.

https://static.tp-link.com/resources/software/TL-R470T_V3_140422.zip

@Andone 

If I use the backup function, when wan1 is dropped it automatically changes to wan2.

This causes me not to recognize wan2?

Andone wrote

@ykzamorpheus 

 

Firstly, make sure you did not use link backup function. Then you can try to exchange the cable for WAN1 and WAN2. Check if the problem only happens on WAN2.

 

And you can try to upgrade the firmware.

https://static.tp-link.com/resources/software/TL-R470T_V3_140422.zip

@ykzamorpheus 

If you use backup function and wan2 is backup wan, then wan2 will offline unless wan1 down. If wan1 and wan2 both offline, it should has problem. Please note that backup function is disabled by default.

For now, it's recommended to upgrade the firmware at first.