3com S7906E Instruccion De Instalación
1-36
Configured Multicast Group Policy Fails to Take Effect
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.
Analysis
z
The ACL rule is incorrectly configured.
z
The multicast group policy is not correctly applied.
z
The function of dropping unknown multicast data is not enabled, so unknown multicast data is
flooded.
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 or igmp-snooping
drop-unknown command to enable the function of dropping unknown multicast data.