Troubleshooting Mld Snooping - HP FlexNetwork 7500 Series Configuration Manual

# Enable MLD snooping, and enable dropping unknown IPv6 multicast data packets for VLAN
100.
[SwitchD-vlan100] mld-snooping enable
[SwitchD-vlan100] mld-snooping drop-unknown
[SwitchD-vlan100] quit
Verifying the configuration
# Display statistics for MLD messages learned through MLD snooping on Switch B.
[SwitchB] display mld-snooping statistics
Received MLD general queries:
Received MLDv1 specific queries:
Received MLDv1 reports:
Received MLD dones:
Sent MLDv1 specific queries:
Received MLDv2 reports:
Received MLDv2 reports with right and wrong records:
Received MLDv2 specific queries:
Received MLDv2 specific sg queries:
Sent MLDv2 specific queries:
Sent MLDv2 specific sg queries:
Received error MLD messages:
The output shows that all switches except Switch A can receive the MLD general queries after
Switch A acts as the MLD snooping querier.

Troubleshooting MLD snooping

Layer 2 multicast forwarding cannot function
Symptom
Layer 2 multicast forwarding cannot function through MLD snooping.
Solution
To resolve the problem:
Use the display mld-snooping command to display MLD snooping status.
1.
If MLD snooping is not enabled, use the mld-snooping command in system view to enable
2.
MLD snooping globally. Then, use the mld-snooping enable command in VLAN view to
enable MLD snooping for the VLAN.
If MLD snooping is enabled globally but not enabled for the VLAN, use the mld-snooping
3.
enable command in VLAN view to enable MLD snooping for the VLAN.
If the problem persists, contact Hewlett Packard Enterprise Support.
4.
IPv6 multicast group policy does not work
Symptom
Hosts can receive multicast data from IPv6 multicast groups that are not permitted by the IPv6
multicast group policy.
Solution
To resolve the problem:
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