Network Tools

All depends on what it is you really want to monitor and what your budget is.

For line utilization, the best tool I have ever used in WAN/QC by EMCOM (www.emcom.com). Its the only tool I have used that can trend detailed utilization over long periods. Reports are available printed or via Web browser. Statistics include circuit protocols and circuit errors.

Looking at devices requires additional thought. Probes will gather LAN traffic statistics, but when the actual devices are monitored the monitor function adds some load to the device.

if the network kit is cisco solarwinds is not bad
you can get a 30 day eval at http://www.solarwinds.net/

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