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What software may i use to monitor a LAN??

I would like you guys to recommend me a software that i may use to monitor my LAN usage cause sometimes i gets very slow and i would like to know who might be causing my network to be Slow, it is not always that's why a suspect someone might be causing this.
1 Solution
Kamran ArshadIT AssociateCommented:

You may check out the below solutions for monitoring bandwidth usage;


SolarWinds Orion      www.solarwinds.com      Propriety
Adventnet OP Manager      www.adventnet.com      Propriety
WhatsupGold      www.whatsupgold.com      Propriety
SNMPc      www.castlerock.com      Propriety
CommView      www.tamos.com      Propriety
AirMagnet      www.airmagnet.com      Propriety
Observer      www.netinst.com      Propriety

Vendor Specific-NMS            

Microsoft Operation Manager      www.microsoft.com      Propriety
HP-OpenView      www.hp.com      Propriety
IBM Tivoli        www.ibm.com      Propriety
CiscoWorks      www.cisco.com      Propriety

Data Center Specific-NMS            

AutoNOC      www.autonoc.com      Propriety
ODCNMS      www.odcnms.org      LAMP based NMS
ITRACS      www.itracs.com      Propriety

Service Monitors            

BigBrother      www.bb4.com      For *NIX based machines
BigSister      www.bigsister.ch      For *NIX based machines
Hound-Dog      www.hounddogiseasy.com      Propriety
Level Platform      www.levelplatforms.com      Propriety
Kaseya      www.kaseya.com      Propriety
N-Able      www.n-able.com      Propriety

Flow Analyzers            

SolarWinds NetFlow Analyzer      www.solarwinds.com      NetFlow/SFlow
PRTG      www.paessler.com/prtg      NetFlow/RRDTool
Adventnet Netflow Analyzer      www.adventnet.com      NetFlow
Traffic Sentinel      www.inmon.com      SFlow
Splunk      www.splunk.com      Propriety

Open-Source NMS            

Ntop      www.ntop.org      LAMP based NMS
Bandwidthd      bandwidthd.sourceforge.net      LAMP based NMS
ZenOSS      www.zenoss.com      LAMP based NMS
Nagios      www.nagios.org      LAMP based NMS
JFFNMS      www.jffnms.org      LAMP based NMS
OpenNMS      www.opennms.org      LAMP based NMS
Zabbix      www.zabbix.com      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
To further shortlist, I recommend going for either Adventnet OP Manager, Cacti, Ntop, or PRTG. Easy to setup all of them.
I like using Mikrotik's the dude to toruble shoot bandwidth issues. it is very easy to use and graphs tx and rx bandwidth going into and out of switch ports, servers and desktops. All you need to do is hever over the link and it will give you the bandwidth. It is very easy to install and it discovers the network very quickly.
It is free.
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