1. Enter the ASUS Router App, tap [ Settings ] > [ LAN ] > [ IP Binding ] > [ IP Binding List ].

2. Tap [+], you can choose between two methods to specify the IP address: [ Select by device list ] and [ Manual Setup ].

3. The following uses the ROG phones as an example to set a specified IP address.

4. To remove a device from the list, as shown in the example below, tap the device name in the [IP Binding List], then tap the Delete icon > [ OK ] to save the settings.

Step 1. Connect your computer to the router via wired or WiFi connection and enter your router's LAN IP or router URL http://www.asusrouter.com to the WEB GUI.

Step 2. Key in your router's username and password to log in.

Note: If you forget the user name and/or password, please restore the router to the factory default status and setup. 

Please refer to [Wireless Router] How to reset the router to factory default setting?  for how to restore the router to default status.

Step 3. Go to [Advanced Settings] > [LAN] > [DHCP server], you can find the IP address range of RT-AX92U is 192.168.50.2 ~ 192.168.50.254.

Step 4. Find [Enable Manual Assignment] and click [Yes] to enable manual assign function.

Step 5. In Manually Assigned IP area, please fill in the device MAC address and the IP address binding to this device only.

Client Name (MAC Address)：Use the dropdown list to choose the device or manual enter the device's MAC address.

Note: When entering the MAC address, the format consists of six groups of hexadecimal numbers, with each group containing two digits, separated by colons. (e.g., 12:34:56:AA:BC:DE)

IP address：The system will automatically fill in the IP address, and you can also manually enter a specified IP address. 

Note: Please make sure the IP address needs to be in the IP pool of your DHCP server. For example, if the IP pool of your router’s DHCP server is 192.168.50.2~192.168.50.254​, you should enter an IP address within this range, like 192.168.50.75.

DNS server (Optional)：Default is blank. You can enter the preferred DNS server if needed.

Step 6. Click the [+] icon and the [Apply] button to to save the settings.

 Step 7. You will be direct to DHCP page if the setting is completed. Please make sure the rule you just set does show up in the manual assign IP list and MAC address/IP address are correct.

If you want to remove a device from the list, as shown in the example below, click the [Delete] button on the right side of the device, and then click [Apply] to to save the settings.

   A DHCP (Dynamic Host Configuration Protocol) server in ASUS router can provide user's devices a private IP address, Subnet mask, Default gateway, DNS server that user does not need to manual assign IP for devices.

    a. Please make sure you've set and apply the rule successfully and you can see the rule show up in the manual assign IP list.

    b. Please make sure the device's MAC address and IP address are correct.

    c. For devices in the binding list, it is recommended to set the system of the device to automatically obtain an IP address. If a static IP is set, you need to fill in the same IP address as in the router's binding list.

    d. Please upgrade your router to latest firmware and reset your router to default status and try again.

    For how to do firmware upgrade, please refer to: [Wireless] How to update the firmware of your router to the latest version ?

    For how to reset router, please refer to: [Wireless Router] How to reset the router to factory default setting?

    a. In the router app, you can modify the IP address.

        As shown in the example image below, tap the device name in th [IP Binding List] > tap [Edit] icon, make your changes, and then tap [OK] to save the settings.

    b. The ASUS router Web GUI does not support modifying the IP address. You need to first click the delete button to remove this rule and apply the settings, and then set a new rule.

    For how to set up the built-in network card of your device, the setup methods may vary slightly between different products. Please consult the device manufacturer or refer to the following instructions.

• For Windows system device - related settings, please refer to Change TCP/IP Settings - Microsoft Support
• For Apply device, please refer to  Official Apple Support
• For androids system device, please connect to the WiFi network first, then tap the icon of the connected WiFi name, find the [Edit icon] in the upper right corner and tap on [Advanced options], then select [Static] in IP Settings, and the option to set the IP address will appear. After setting it, tap [Save] to save the settings.