Operation Manual – Multicast ProtocolH3C S9500 Series Routing Switches Chapter 5 IGMP Configuration5-10Table 5-10 Deleting IGMP groups joined on an interfaceOperation CommandDelete IGMP groupsjoined on an interfacereset igmp group { all | interface vlan-interfaceinterface-number { all | group-address [ group-mask ] } }After a group is deleted, if other IGMP membership report messages occur, theinterfaces can join the corresponding group again.5.2.11 Configuring the Filtering Rule of Multicast GroupsOn the IGMP snooping-enabled switch, you can configure ACL rules whether thespecified multicast group can be joined to a VLAN or not. This feature filters everyreceived IGMP join packet. According to the destination group address of the packetsand the ACL rule bound to the VLAN, the switch determines whether to discard thepackets or let them pass.By setting the filtering rule of multicast groups in the VLAN, you can control access to IPmulticast groups. You can only configure one ACL rule for each VLAN, and the newconfigured rule will replace the old one.Perform the following configuration in VLAN view.Table 5-11 Configure the aging time of multicast group membersOperation CommandSet the filtering rule of multicast groupsin the specified VLANigmp-snooping group-policyacl-numberCancel the filtering rule of multicastgroups in the specified VLAN undo igmp-snooping group-policyBy default, no filtering rule is set for a VLAN. In this case, a host can be joined to anymulticast group.Caution:z If an inexistent acl-number is bound to the VLAN, or if the bound acl-number is notconfigured with a rule, a host is still allowed to join any multicast group.z If no acl-number exists, you can also configure the filtering rule of multicast groupsin VLAN view. That is, this rule is not restricted by the ACL itself, and is valid for allmembers in the specified VLAN.
