how to best monitor network traffic for Cisco 3500 Catalysts

Posted on 2009-02-13
Last Modified: 2012-05-06
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.......
Question by:jffisher
    LVL 12

    Expert Comment

    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

    Author Comment

    Will these devices support RMON and if so what type of application could I use to catpure / display the data.
    LVL 32

    Accepted Solution


    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      Propriety
    Adventnet OP Manager      Propriety
    WhatsupGold      Propriety
    CommView      Propriety
    Observer      Propriety
    PRTG      NetFlow/RRDTool

    Vendor Specific-NMS            

    Microsoft Operation Manager      Propriety
    CiscoWorks      Propriety

    Open-Source NMS            

    Ntop      LAMP based NMS
    Bandwidthd      LAMP based NMS
    Etherape      LAMP based NMS
    MRTG      RRDTool
    Cacti      RRDTool

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

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    IT, Stop Being Called Into Every Meeting

    Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

    Suggested Solutions

    Is your computer hacked? learn how to detect and delete malware in your PC
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
    In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor ( If you're interested in additional methods for monitoring bandwidt…

    737 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    22 Experts available now in Live!

    Get 1:1 Help Now