Configured Multicast Group Policy Fails To Take Effect - H3C S9500 Series Operation Manual

Operation Manual – IGMP Snooping
H3C S9500 Series Routing Switches

1.9.2 Configured Multicast Group Policy Fails to Take Effect

I. Symptom
Although a multicast group policy has been configured to allow hosts to join specific
multicast groups, the hosts can still receive multicast data addressed to other multicast
groups.
II. Analysis
The ACL rule is incorrectly configured.
The multicast group policy is not applied.
The function of dropping unknown multicast data is not enabled, so unknown
multicast data is broadcast.
Certain ports have been configured as static member ports of multicasts groups,
and this configuration conflicts with the configured multicast group policy.
III. Solution
1) Use the display acl command to check the configured ACL rule. Make sure that
the ACL rule conforms to the multicast group policy to be implemented.
2) Use the display this command in IGMP Snooping view or in the corresponding
interface view to check whether the correct multicast group policy has been
applied. If not, use the group-policy or igmp-snooping group-policy command
to apply the correct multicast group policy.
3) Use the display current-configuration command to check whether the function
of dropping unknown multicast data is enabled. If not, use the drop-unknown
command to enable the function of dropping unknown multicast data.
4) Use the display igmp-snooping group command to check whether any port has
been configured as a static member port of any multicast group. If so, check
whether this configuration conflicts with the configured multicast group policy. If
any conflict exists, remove the port as a static member of the multicast group.
Chapter 1 IGMP Snooping Configuration
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