Need Help on configuring ASA5506

[shobusi]

Every time I try to create a sub-interface in the ASA5506 on Cisco Packet Tracer, it shows the above error. I don't know why it's happening. Can anybody help me with this?

[Kasun Bandara]

@shobusi hi.. packet tracer do not support the subinterfaces for the ASA as of today.

if you prefer to have a more advanced configurations, i am suggesting to try cisco CML. its free for 5 nodes.