H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 83)

74
Host port(s):total 1 port(s).
WLAN-DBSS1:0 (D)
MAC group(s):
MAC group address:3333-0000-0101
Host port(s):total 1 port.
WLAN-DBSS1:0
Troubleshooting MLD snooping
Layer 2 multicast forwarding cannot function
Symptom
Layer 2 multicast forwarding cannot function.
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.
IPv6 multicast group policy failed 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.
• Certain ports have been configured as static member ports of IPv6 multicasts groups, and this
configuration conflicts with the configured IPv6 multicast group policy.
Solution
1. Use the display acl ipv6 command to check the configured IPv6 ACL rule. Make sure that the IPv6
ACL rule conforms to the IPv6 multicast group policy to be implemented.
2. Use the display this command in MLD-snooping view or the corresponding interface view to check
whether the correct IPv6 multicast group policy has been applied. If not, use the group-policy or
mld-snooping group-policy command to apply the correct IPv6 multicast group policy.