80
Port flags: D-Dynamic port, S-Static port, C-Copy 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).
GE1/0/4 (D)
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 1 port(s).
GE1/0/4
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.
Solution
1.
Enter the
display current-configuration
command to view 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, just 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.