Troubleshooting Mld Snooping; Layer 2 Multicast Forwarding Cannot Function - H3C S5500-EI Configuration Manual

The output shows that GigabitEthernet 1/0/3 on Switch B has joined FF1E::101 but not FF1E::102.
Assume that Source 2 starts sending multicast traffic to FF1E::101. Use the display multicast ipv6
forwarding-table to display the IPv6 multicast forwarding table information.
# Display the information about FF1E::101 in the IPv6 multicast forwarding table on Switch A.
[SwitchA] display multicast ipv6 forwarding-table ff1e::101
IPv6 Multicast Forwarding Table
Total 1 entry
Total 1 entry matched
00001. (1::1, FF1E::101)
MID: 0, Flags: 0x0:0
Uptime: 00:08:32, Timeout in: 00:03:26
Incoming interface: Vlan-interface101
List of 1 outgoing interfaces:
1: Vlan-interface104
Matched 19648 packets(20512512 bytes), Wrong If 0 packets
Forwarded 19648 packets(20512512 bytes)
The output shows that Switch A maintains a multicast forwarding entry for multicast packets from Source
1 to FF1E::101. No forwarding entry exists for packets from Source 2 to FF1E::101, which indicates that
IPv6 multicast packets from Source 2 are blocked.

Troubleshooting MLD snooping

Layer 2 multicast forwarding cannot function

Symptom
Layer 2 multicast forwarding cannot function.
Analysis
MLD snooping is not enabled.
Solution
Use the display current-configuration command to display the running status of MLD snooping.
1.
If MLD snooping is not enabled, use the mld-snooping command to enable MLD snooping globally,
2.
and then use mld-snooping enable command to enable MLD snooping in VLAN view.
If MLD snooping is disabled only for the corresponding VLAN, use the mld-snooping enable
3.
command in VLAN view to enable MLD snooping in the corresponding VLAN.
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