HP Procurve mirroring

Posted on 2009-02-18
Last Modified: 2012-05-06
I use Procurve 2900G. I want to capture traffic of port21.  Port1 is mirrorportPort and I can capture traffic of port 21. But captured data  have 802.1q tag, also port 21 was setted access port. What should I do to remove 802.1q tag ?

[pc]------[Procurve]port21 vlan100----------vlan100[hoge]-----[pc]
                        | port1
               [Capture PC]
Question by:y-ball
    LVL 12

    Accepted Solution

    Do you have a VLAN aware NIC on the PC capturing the data?  Use a .1q compliant NIC if you what to see all bidirectional traffic on a ProCurve mirror port. If you dont have a .1q compliant NIC, make sure to enable the .1p setting in the driver, this will allow it to receive the oversized packet (although it wont interpret the VLAN tag).
    -Generally- speaking, traffic out an untagged port will
    usually show up untagged on the mirroring port, and traffic out
    a tagged port will usually show up tagged on the mirroring
    port, unless the primary vlan ID of the port happens to match the
    VLAN ID of the packet, in which case 802.1Q says the tag should
    be stripped.  
    LVL 32

    Assisted Solution

    by:Kamran Arshad

    You can check if your NIC is 802.1q compatible. Follow the steps;

    1- Go to 'Device Manager'
    2- Right Click on your NIC 'Properties'
    3- Go to the 'Advanced' tab.

    Here you will see if your NIC is compatible with 802.1q or not. If not then try updating the NIC driver.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Threat Intelligence Starter Resources

    Integrating threat intelligence can be challenging, and not all companies are ready. These resources can help you build awareness and prepare for defense.

    I see many questions here on Experts Exchange regarding switch port configurations and trunks. This article is meant for beginners in the subject to help to get basic knowledge about Virtual Local Area Network (VLAN (…
    PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
    This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor ( If you're looking for how to monitor bandwidth using netflow or packet s…
    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…

    779 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

    9 Experts available now in Live!

    Get 1:1 Help Now