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Port mirroring on a HPE 1920-24G-PoE+ wont work

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  • 1.  Port mirroring on a HPE 1920-24G-PoE+ wont work

    Posted Sep 25, 2019 04:09 AM

    Hi there,

    due to a tricky wifi problem I have to dump the traffic out, which passed the core switch (HPE 1920-24G-PoE+) to the router. 

    To do so, I added a "Mirroring Group ID" and added the uplink port to the router (GE1/0/24) as "Monitor Port" and set a  "Mirror Port" (GE1/0/23) too. You might have a look at the screenshot https://ibb.co/5vtb0Pr.

    But if I attach my laptop to GE1/0/23 and start wireshark, I only see ARP and upnp broadcasts. No TCP or UDP traffic. Thats very weird.

    Additional info:

    Swtich is running software version 5.20.99 Release 1121

    Any ideas are welcome!


    #Network
    #mirroring
    #Dump
    #traffic
    #Port


  • 2.  RE: Port mirroring on a HPE 1920-24G-PoE+ wont work

    Posted Sep 25, 2019 05:45 AM

    Shame on me! 

    I was on the wrong trip. "Mirror Port" is the source and "Monitor Port" is the port, where the traffic is mirrored to.

    After I switched both ports, the problem is solved.