How Can I Filter for Traffic when There Is No Predefined Filter?

  • Use BPF (Berkley Packet Filter).
  • For help with BPF Filter format see: Man page of TCPDUMP
  • Example: for filtering LLDP traffic using BPF with VLAN tagged traffic:
    • (vlan and (ether proto 0x88cc))
  • OR, without VLAN tags present:
    • ether proto 0x88cc
  • NOTE: BPF filters do not affect the dashboard views. BPF filtering uses the time range selected and the BPF filter applied when selecting Download PCAP.
  • Last modified: April 13, 2022