Alert Macro / Variable for IP address

If you know the interface ip address.....you may consider creating custom interface property and manually input the interface ip address. From there you can create the variable you need. This is the easiest workaround I did

You should be able to use the variable ${IP_Address} within your alert email to display the ip address of the node that the alert applies to.

You can view the available variables in the admin guide at this link