How cool is this? (hat tip: Cisco IOS hints and tricks blog):
NIST Net is a network emulation package that runs on Linux. The NIST Net network emulator is a general-purpose tool for emulating performance dynamics in IP networks. The tool is designed to allow controlled, reproducible experiments with network performance-sensitive/adaptive applications and control protocols in a simple laboratory setting. By operating at the IP level, NIST Net can emulate the critical end-to-end performance characteristics imposed by various wide area network situations (e.g., congestion loss) or by various underlying subnet technologies (e.g., asymmetric bandwidth situations of xDSL and cable modems).
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Once NIST Net has completed starting up, you see a menu from which you can launch the emulation tool with different network settings: Please select a preset from the following options:
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1: 40ms round-trip delay, T1 bandwidth, 0.5% packet loss
2: 60ms round-trip delay, T1 bandwidth, 0.5% packet loss
3: 80ms round-trip delay, T1 bandwidth, 0.5% packet loss
4: 100ms round-trip delay, T1 bandwidth, 0.5% packet loss
5: 120ms round-trip delay, T1 bandwidth, 0.5% packet loss
6: 160ms round-trip delay, T1 bandwidth, 0.5% packet loss 7: Custom Settings
8: Stop WAN Emulation
9: Exit…
BTW…if your wanting the NistNET .iso you can download it and other industry tools from CCO (login required) @ the following location:http://www.cisco.com/cgi-bin/tablebuild.pl/fe_util
