Unable to add an IP address in Plesk: This network interface obtains IP addresses automatically

Symptoms

• Unable to add an IP address in Plesk > Tools & Settings > IP Addresses. The following error is shown:

  Cannot add the IP address 203.0.113.2. This network interface obtains IP addresses automatically.

Cause

Static IP addresses cannot be added on DHCP-enabled network interfaces.

Resolution

Change the network interface to static:

1. Connect to the server via RDP.
2. Run the following command and write down the current IP addresses (which is leased by the DHCP) from IPv4/IPv6 Addresses, Subnet Mask, Default Gateway, DNS Servers:

   C:> ipconfig /all

3. Go to Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings > example_interface > Properties > Internet Protocol Version 4|6 (TCP/IPv4|IPv6).
4. Switch to the Use the following IP address option.
5. Add the IP addresses taken from step #2.
6. Click OK.

   Note: It is highly recommended to perform this task during maintenance time.