Network Monitoring tool

I would like to know is there some free network monitoring tool which can be used to detect network devices node down alerts.

It should be a free tool like MRTG. It should be capable of detecting if any network device goes down or unreachable & alert e-mail should be generated.
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SrikantRajeevAsked:
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rcflyrCommented:
I use Nagios (http://nagios.org/)

A lot of people in here like groundwork (http://www.groundworkopensource.com/)
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SrikantRajeevAuthor Commented:
if i install nagios in windows platform will it give me the same features like installing in linux
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mhill483Commented:
Have a look at Spiceworks. www.spiceworks.com .You may find what you need there.
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Powerful Yet Easy-to-Use Network Monitoring

Identify excessive bandwidth utilization or unexpected application traffic with SolarWinds Bandwidth Analyzer Pack.

SrikantRajeevAuthor Commented:
thanks for your reply. Let me ckeck spiceworks .
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Kamran ArshadIT AssociateCommented:
Hi,

There are plenty of options available. You may check out the below solutions;

Propriety-NMS            

SolarWinds Orion      www.solarwinds.com      Propriety
WhatsupGold      www.whatsupgold.com      Propriety
Observer      www.netinst.com      Propriety
Adventnet OP Manager      www.adventnet.com      Propriety
Overseer      www.overseer-network-monitor.com      Propriety
ServerAlive      www.woodstone.nu      Propriety
CommView      www.tamos.com      Propriety
AirMagnet      www.airmagnet.com      Propriety
MonitorMagic      www.tools4ever.com      Propriety

Open-Source NMS            

Ntop      www.ntop.org      LAMP based NMS
Bandwidthd      bandwidthd.sourceforge.net      LAMP based NMS
Nagios      www.nagios.org      LAMP based NMS
Hyperic HQ      www.hyperic.com      LAMP based NMS
Etherape      etherape.sourceforge.net      LAMP based NMS
MRTG      oss.oetiker.ch/mrtg      RRDTool
Cacti      www.cacti.net      RRDTool

Explaining the above list, If you can pay then Orion IP monitor from solarwinds, Adventnet OP Manager or WhatsUpGold are decent options. If you want to build some free open-source solution, then have a look at Cacti, Nagios or NTop.
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SrikantRajeevAuthor Commented:
thanks
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