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Jagmeet_Singh_B's avatar
Jagmeet_Singh_B
Icon for Nimbostratus rankNimbostratus
Mar 27, 2015

F5 Vlan Tagging

F5 is not passing vlan tag in the packet headers. Tcpdump -ni vlan not showing any information and i have validated same through wireshark. Can you please help what i am missing in the configuration.

 

I have configured the interface with tag.

 

6 Replies

  • gsharri's avatar
    gsharri
    Icon for Altostratus rankAltostratus
    Mar 27, 2015

    Use the interface number ( -ni 1.1 ) in place of the vlan name if you want to see tag information. The tag is not present when capturing using a vlan name. See SOL7227.

     

  • Jagmeet_Singh_B's avatar
    Jagmeet_Singh_B
    Icon for Nimbostratus rankNimbostratus
    Mar 27, 2015

    Thanks Scott for quick reply.

     

    i used tcpdump -ni 1.1 vlan 101 and tcpdump -ni 1.1 with no luck

     

    • dragonflymr's avatar
      dragonflymr
      Icon for Cirrostratus rankCirrostratus
      Mar 28, 2015
      Hi, Maybe I am wrongbut try to add -e to your tcpdump Piotr
    • StephanManthey's avatar
      StephanManthey
      Icon for Nacreous rankNacreous
      Mar 28, 2015
      Piotr is right (+1). The '-e' parameter (aka ethernet header) will show all layer 2 information including MAC addresses and VLAN tag.
  • dragonflymr's avatar
    dragonflymr
    Icon for Cirrostratus rankCirrostratus
    Mar 29, 2015

    Glad to help. As more GUI than CLI person I really recommend using Wireshark with F5 plugin (F5 plugin), it's just wonderful.

     

    Piotr

     

  • Jagmeet_Singh_B's avatar
    Jagmeet_Singh_B
    Icon for Nimbostratus rankNimbostratus
    Mar 30, 2015

    Thanks all for your help and feedbacks. I was doing tcpdump on data interface with VLAN tag and it was not working due to SOL7227. I did wireshark capture from switch port for data interface and i am able to validate 802.1Q tagging field.

     

    tcdump is not displaying vlan information with -e parameter. It shows mac addresses however no vlan tagging.

     

    Thanks again for your help everyone.