I've been looking for a more rational network analysis tool. Now I have found it: PRTG Network Monitor. This software combines all that imagines an administrator in Network Monitoring Sun.
Here is an excerpt from the functionality of the software:
Download, Installation & Operation
- Instant Download (60MB): No registration forms or
- Runs on all Windows versions XP: Server- or Workstation License, 32- or 64-bit
- Can be installed in 3 Minutes: No additional downloads required (.NET, SQL Server etc.)
- Interactive user guide: Most users need read no manual for initial setup (and require no training)
- Option 1: the Automatic Netzwerkerkennung Sensors created for your network (ca. 1 My. per unit)
- Option 2: Manual creation of devices / sensors (ca. 5 My. per unit)