Hi,

I haven't used cisco routers before (I'm very well accustomed to their line of switches including their multilayer line such as6509).

I'm really confused as to the status codes that I am seeing in both PacketTracer and GNS3 with any of the routers.

Basically you fire one up, run "no shutdown" on an Ethernet interface and it automatically goes up irrespective of having nothing connect to the interface.

Why would the interface status be up and operational if nothing is connected? Is this just bad behaviour from both GNS3 & PacketTracer, or is this what is to be expected from an actual cisco router? If so, then why?

This is not case in real life. However, Physical and Datalink layers are simulated in GNS3 and this the cause for the issue.

_________________
Br,
Kaage