How to set IP address manually and statically

The TP-LINK router is an example:

General default default router gateway IP address, also known as web management IP address, LAN network segment IP address, default is 192.168.1.1

However, because the IP address of the optical cat (the IP address of the external network) is also 192.168.1.1, conflicts often occur, either by modifying the IP address of the LAN network or by modifying the IP address of the WAN network segment.

If you are modifying the IP address of the LAN network segment, as shown below:

Change 192.168.1.1 to 192.168.0.1, which is not valid when logging in with 192.168.1.1, and it is not valid to log in with tplogin.cn, so what now?

After the modification is completed as above, manual configuration assignment is required on the other side of the terminal device, as shown in the following figure:

Just these two steps.