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Spirent TestCenter: IGMP route disappears on the router after 1 or 2 minutes.

  • Multicast traffic stops being forwarded after 2 minutes.
  • Router no longer shows IGMP route.
  • Sending Join again starts traffic.
  • Spirent TestCenter
    • IGMPv2
    • IGMPv3
    • MLDv1
    • MLDv2
    • PIM-SSM
    • IPv4
    • IPv6
  • Source continues to transmit but router clears the multicast group from its table and stops forwarding traffic.
  • It's possible setting up TestCenter to send queries could help but that is not normal multicast router behavior.
    • The router is the one that should be sending queries to determine if client still wants to receive traffic.
  • In most cases, the router requires PIM setup and to have the source be a PIM neighbor.
Root Cause
  • Configuration

Product : Access,Spirent TestCenter,IGMP/MLD