237
Total 1 MAC Group(s).
Port flags: D-Dynamic port, S-Static port, C-Copy port, P-PIM port
Subvlan flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port(s).
GE1/0/1 (D)
IP group(s):the following ip group(s) match to one mac group.
IP group address:FF1E::101
(::, FF1E::101):
Host port(s):total 1 port(s).
GE1/0/3 (D)
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 1 port(s).
GE1/0/3
Troubleshooting MLD snooping
Layer 2 multicast forwarding cannot function
Symptom
Layer 2 multicast forwarding cannot function.
Analysis
MLD snooping is not enabled.
Solution
1. Use the display current-configuration command to display the running status of MLD snooping.
2. If MLD snooping is not enabled, use the mld-snooping command to enable MLD snooping globally,
and then use mld-snooping enable command to enable MLD snooping in VLAN view.
3. If MLD snooping is disabled only for the corresponding VLAN, use the mld-snooping enable
command in VLAN view to enable MLD snooping in the corresponding VLAN.
Configured IPv6 multicast group policy fails to take effect
Symptom
Although an IPv6 multicast group policy has been configured to allow hosts to join specific IPv6 multicast
groups, the hosts can still receive IPv6 multicast data addressed to other groups.
Analysis
• The IPv6 ACL rule is incorrectly configured.
• The IPv6 multicast group policy is not correctly applied.
• The function of dropping unknown IPv6 multicast data is not enabled, so unknown IPv6 multicast
data is flooded.
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