Cluster occasionally stops forwarding multicast traffic

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Technical Level

Symptoms

Cluster occasionally stops forwarding multicast traffic - multicast traffic does flow through the outgoing interface.
Output of Clish command 'show pim joins' shows PIM joins correctly.
Disabling or enabling SecureXL does not change anything.

Cause

/proc/net/ip_mr_cache and /proc/net/ip_mr_vif do not match the actual interfaces of multicast sender and multicast receivers.

Solution

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