Packet Tracer 6.3 is fully compatible with labs created in Packet Tracer 6.2, 6.1.1, 6.0.1 and 5.X. A guest access to Packet Tracer is still possible with a 15s wait time at program startup. Netacad users have to login using their cisco credentials. There is no new feature in this version which introduces Netacad login at program start.
