Customer Service Center
Spirent KB Article
Doc ID: KNI11970
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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.
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.
Product : Access,Spirent TestCenter,IGMP/MLD