Troubleshooting Mld Snooping; Switch Fails In Layer 2 Multicast Forwarding - HP 4800G Series Configuration Manual

[SwitchA-vlan100] mld-snooping querier
[SwitchA-vlan100] quit
2) Configure Switch B
# Enable IPv6 forwarding and enable MLD Snooping globally.
<SwitchB> system-view
[SwitchB] ipv6
[SwitchB] mld-snooping
[SwitchB-mld-snooping] quit
# Create VLAN 100, add GigabitEthernet 1/0/1 through GigabitEthernet 1/0/4 into VLAN 100.
[SwitchB] vlan 100
[SwitchB-vlan100] port gigabitethernet 1/0/1 to gigabitethernet 1/0/4
# Enable the MLD Snooping feature and the function of dropping unknown IPv6 multicast data packets
in VLAN 100.
[SwitchB-vlan100] mld-snooping enable
[SwitchB-vlan100] mld-snooping drop-unknown
[SwitchB-vlan100] quit
Configurations of Switch C and Switch D are similar to the configuration of Switch B.
3) Verify the configuration
When the MLD Snooping querier starts to work, all the switches but the querier receive MLD general
queries. Use the display mld-snooping statistics command to view the statistics information of these
MLD messages received.
# View the MLD message statistics on Switch B.
[SwitchB-vlan100] display mld-snooping statistics
Received MLD general queries:3.
Received MLDv1 specific queries:0.
Received MLDv1 reports:12.
Received MLD dones:0.
Sent MLDv1 specific queries:0.
Received MLDv2 reports:0.
Received MLDv2 reports with right and wrong records:0.
Received MLDv2 specific queries:0.
Received MLDv2 specific sg queries:0.
Sent MLDv2 specific queries:0.
Sent MLDv2 specific sg queries:0.
Received error MLD messages:0.

Troubleshooting MLD Snooping

Switch Fails in Layer 2 Multicast Forwarding

Symptom
A switch fails to implement Layer 2 multicast forwarding.
Analysis
MLD Snooping is not enabled.
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