As we can get a tav value by {EVENT.TAGS.<tagname>}, there is no way to get a specific host interface.

It will be nice to have a name for the interface, and reference them like {HOST.INTERFACE.<interfacename>}.

If we add an internal check like, zabbix.interfaceAvalilability(/host/interfacename,<active|passive>) and it returns the last timestamp when a value was returned using this interface, it will come in handy when developing health of the sistem