Emulator

Testing Network Changes When No Test Labs Exist? [Slashdot Comments]

http://ask.slashdot.org/comments.pl?sid=1489564&cid=30547976 slashdot comments on the topic listing useful network testing and emulation tools

serpentf: Полноценная симуляция объединенных сетей Ethernet при помощи dynamips и vmware.

http://serpentf.livejournal.com/560.html [Russian] emulation of nework setup using dynagen and vmware

Dynamips / Dynagen Tutorial

http://dynagen.org/tutorial.htm Dynamips is a Cisco router emulator written by Christophe Fillot. It emulates 1700, 2600, 3600, 3700, and 7200 hardware platforms, and runs standard IOS images. In Chris’ own words: