Greetings all, I am by no means an expert in switching and routing, but I know my fair share.  I recently ran into an interesting situation in my lab.  I have a network with a single switch connected to a core switch, which is then connected to a rou...

I am looking for a router/switch simulator or emulator that I can use to test configurations and changes without using equipment.  All the one's I have found are geared to the CCNA/CCNP exams and are not fully functional.  Anyone have any ideas?