![]() In my setup, I emulated the Layer-3 switched environment of three sites connected by 100Mbit links to a central router that functioned as the provider cloud. ![]() Once you have everything in place and built your virtual network, each device can be accessed via console. On Windows, the install is basically just a double-click, roughly the same for Ubuntu. All told, the install on CentOS took about 45 minutes, mostly waiting for various packages to compile. I built my installation on CentOS with few problems other than compiling Qt 2.4.3, SIP, PyQt, and a patched QEMU from scratch. The Windows version comes complete with all the requisite supporting packages, and the Mac OS X version provides everything but QEMU, which can be a hassle to install unless you're versed in the use of MacPorts. ![]() I've found that GNS3 functions best on the Linux platform, and there are step-by-step guides to install it on Ubuntu. ![]() ![]() Virtual Ethernet and ATM switches are available with VLAN and trunking support. In the GUI editor, you can add interface modules to the routers, select the link types you want to use (ATM, T1, Fast Ethernet, Gigabit Ethernet), and link the routers, firewalls, and even emulated host systems. ![]()
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