Solved

network monitoring..

Posted on 2004-10-21
250 Views
Last Modified: 2010-04-10
Here is a senario, would I still be able to effectively monitor the network traffic?

I have two managed HP switches stacked together with most of the clients and servers on it, I have another unmanaged HP switch with some clients on it, that unmanaged switch is connected to the managed stack with a cat5 cable. I would imagine this would work fine since the traffic from the unmanaged switch would flow through the managed stack, and into the monitor port that the sniffer is connected to.

Thanks in advance!
0
Question by:cbtech
    4 Comments
     
    LVL 4

    Accepted Solution

    by:
    Depends.

    The monitor port is set to span other specific ports. If the unmanged switch connects to port 2 and you have port 1 set to monitor port 2 then you will see any traffic coming across port 2 to your switch on port 1. If the two systems that are talking to each other, however, are on the same unmanged switch, you will never see the traffic.

    In the below example, if you have the correct port monitored on switch two, you will see traffic from PC1 and PC2 going to PC3 but you would not see traffic from PC1 going to PC2.

    PC 1          PC 2                             PC3
    |               |                                  |
    SWITCH ONE ------------------SWITCH TWO
                                               |
                                           Monitor


    0
     

    Author Comment

    by:cbtech
    So in my case, since I have the two managed switches stacked, making them virtually one, any traffic between the two managed stacked switches and the unmanaged one I could see, but any traffic local to the unmanaged switch I cannot see, since it doesnt come across from the unmaged switch to the managed stack?

    Thanks!
    0
     
    LVL 1

    Expert Comment

    by:Musfa
    syn_ack_fin is correct.

    You won't see any traffic that stays on the unmanaged switched and never comes over into the manages switches.
    0
     

    Expert Comment

    by:rsoxhater
    We use Paessler Router Traffic grapher - http://www.paessler.com/prtg

    You can set it up to monitor any port on the managed switches if you enable SNMP.  Gives you nice graphs of traffic going in and out of any port in real time.  But like the other guys said, any traffic staying within the unmanaged switch can't be monitored.

    Try out the program - the free edition allows you to setup one monitor - so you can try monitoring one port and get an idea of the traffice.  The full version is pretty cheap - $49 I think.  Runs a service on any windows computer.  I highly recommend it.
    0

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone. Privacy Policy Terms of Use

    Featured Post

    How to run any project with ease

    Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
    - Combine task lists, docs, spreadsheets, and chat in one
    - View and edit from mobile/offline
    - Cut down on emails

    I eventually solved a perplexing problem setting up telnet for a new switch.  I installed a new Cisco WS-03560X-24P switch connected to an existing Cisco 4506 running a WS-X4013-10GE Sup II-Plus. After configuring vlans and trunking,  I could no…
    Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
    After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), 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…
    After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), 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…

    877 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

    15 Experts available now in Live!

    Get 1:1 Help Now