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how to best monitor network traffic for Cisco 3500 Catalysts

I am looking for the best and most cost effictive way to monitor network traffic on my LAN. I have 10 Cisco 3500, 3550, 3560 catalyst switches. I am doing Inter-Vlan routing as well. What is the best method and application to use to view the traffic. Thanks in advance.......
1 Solution
Unfortunately, thoses switches don't support netflow which would be your best option.

In your case, I would use a SNMP based product like Solarwinds to poll the devices and interfaces regularly.

If you need temporary monitoring, I recommend port mirroring to another port and using wireshark
jffisherAuthor Commented:
Will these devices support RMON and if so what type of application could I use to catpure / display the data.
Kamran ArshadCommented:

For diagnostic purposes you can switch on SPAN and monitor traffic via Wireshark;


For a consistent traffic monitoring, below is a list of SNMP-based NMS;


SolarWinds Orion      www.solarwinds.com      Propriety
Adventnet OP Manager      www.adventnet.com      Propriety
WhatsupGold      www.whatsupgold.com      Propriety
CommView      www.tamos.com      Propriety
Observer      www.netinst.com      Propriety
PRTG      www.paessler.com/prtg      NetFlow/RRDTool

Vendor Specific-NMS            

Microsoft Operation Manager      www.microsoft.com      Propriety
CiscoWorks      www.cisco.com      Propriety

Open-Source NMS            

Ntop      www.ntop.org      LAMP based NMS
Bandwidthd      bandwidthd.sourceforge.net      LAMP based NMS
Etherape      etherape.sourceforge.net      LAMP based NMS
MRTG      oss.oetiker.ch/mrtg      RRDTool
Cacti      www.cacti.net      RRDTool

Personal recommendations are either using Cacti, NTOP in open-source or use PRTG, WhatsUpGold Solarwinds Orion or Adventnet OP Manager in propriety solutions.

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