Hi Dejan,
How are you...
Yes you can monitor if you have enabled secondary ip address for any of your L3 interface, it will be reflected under DFM > device details > Interface > Make it as True if you want to monitor via snmp, or else make it as false for not to monitor.
Assuming that if you have one Trunk port, even that also can be monitored under DFM > device details > port.
regards
Rajesh