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Spirent KB Article
Doc ID: KNI11970
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Spirent TestCenter: IGMP route disappears on the router after 1 or 2 minutes.
Symptoms
Multicast traffic stops being forwarded after 2 minutes.
Router no longer shows IGMP route.
Sending Join again starts traffic.
Environment
Spirent TestCenter
IGMPv2
IGMPv3
MLDv1
MLDv2
PIM-SSM
IPv4
IPv6
Explanation/Resolution
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
Version
1.0
Publish Date
2014-02-13
Categories
Product : Access,Spirent TestCenter,IGMP/MLD
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