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Analysis
• The ACL is incorrectly configured.
• The multicast group filter is not correctly applied.
• The function of dropping unknown multicast data is not enabled, so unknown multicast data is
flooded.
Solution
1. Use the display acl command to verify that the configured ACL meets the multicast group filter
requirements.
2. Use the display this command in IGMP-snooping view or in a corresponding interface view to
verify that the correct multicast group filter has been applied. If not, use the group-policy or
igmp-snooping group-policy command to apply the correct multicast group filter.
3. Use the display igmp-snooping command to verify that the function of dropping unknown multicast
data is enabled. If not, use the drop-unknown or igmp-snooping drop-unknown command to
enable the function of dropping unknown multicast data.
4. If the problem persists, contact HP Support.
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