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IGMP traffic dropped by "local interface address spoofing" in VSX HA
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As the traffic is leaving using the funny IP, when it arrives the other VS, it is dropped by: "local interface address spoofing" (it is normal that multiple VS's will use the same internal IP, as mentioned in sk110345).
IGMP traffic sent by the cluster mechanism is sent using the internal IP (Funny IP), towards Multicast group 0.0.0.0. The wrp links are trying to reach out multicast group 0.0.0.0.