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GNS3 is a graphical network simulator that allows you to design complex network topologies. You may run simulations or configure devices ranging from simple workstations to powerful Cisco routers. It is based on Dynamips, an IOS emulator which allows users to run IOS binary images from Cisco Systems and Pemu, a PIXOS emulator to emulate PIX firewalls. License: GNU General Public License (GPL) Changes:
Users can change the workspace size, and draw rectangles and ellipses. Annotations, rectangles, and ellipses can also be rotated. Interface names are now included in the Generic Ethernet NIO list (on Win32), and interfaces' labels can be created automatically. Multi-links don't overlap anymore. The snapshot feature has been implemented. Export to image can now export the whole workspace. There is a "collapse/expand all" feature on the topology panel. You can specify an alternate config file using --configdir parameters.



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