The commands and interfaces used to configure a loopback interface vary slightly between operating systems, and sometimes between versions of the same operating system. Check the documentation for your server operating system for instructions on how to configure a loopback interface. For example, on some BSD systems, the command used in Step 1 in the previous section would be slightly different, as shown below:
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# ifconfig lo0 cluster-ip netmask cluster-netmask alias |
Notice that in this case, the netmask used matches the netmask used to configure the cluster on FortiADC, instead of 255.255.255.255 as in the Linux system example.