We don't have a supported method for doing this yet. Though you should be able to do it manually if you have some linux knowledge.

Do you know if you need to have a second ethernet interface or if you simply need an aliased interface with an additional IP address? Do you have a reference to what you are trying to do?

This is the kind of customization we are not likely to add directly to the admin portal but want to provide documentation or guidance so our customers can perfom them without much trouble.

Austin