Graphical Network Simulator - Open Source

Guys, check this really cool Cisco emulator with less hassle to setup.

www.gns3.net/

Features:
# Designing high quality complex network topologies.
# Emulating Cisco routers.
# Simulating simple Ethernet, ATM and Frame Relay switches.
# Load-balancing between multiple hypervisors.
# Load and save in Dynagen's INI-like format.
# Image export (JPEG, PNG, BMP and XPM).

Also see here: www.blindhog.net/gns3-how-to-use-putty-f...ole-access/#more-141
for how to setup putty as your telnet client.
Have fun!

Pretty Freakin HOT.!!!!

Sweet, I may have to give this a shot.

It's a GUI of the Dynagen/Dynamips router emulator. Used it before, Rocks. But still in preliminary phase and there are some issues, I expect/hope allot from this in the comming years. Dynagen/Dynamips are improving rapidly. There is probably much more to come.