576 CHAPTER 31: IGMP SNOOPING CONFIGURATION COMMANDSgroups. You can configure only one ACL rule for each VLAN, and the newconfigured rule will replace the old one.Use the undo igmp-snooping group-policy command to cancel theconfiguration.By default, no filtering rule is set in a VLAN. In this case, a host can join anymulticast group.Example# Create ACL2001 and configure the flow rule for basic ACL, using the source IPaddress serves as the destination multicast address. system-viewSystem View: return to User View with Ctrl+Z.[SW8800]acl number 2001[3Com-acl-basic-2001]rule 0 permit source 224.1.1.1 0[3Com-acl-basic-2001]quit# Create VLAN 2. system-viewSystem View: return to User View with Ctrl+Z.[SW8800]vlan 2# Configure the filtering rule of multicast groups in VLAN2.[3Com-vlan2]igmp-snooping group-policy 2001# Cancel the filtering rule in VLAN2.[3Com-vlan2]undo igmp-snooping group-policyigmp-snoopinghost-aging-timeSyntaxigmp-snooping host-aging-time secondsundo igmp-snooping host-aging-timeViewSystem viewParameterseconds: Port aging time for the multicast group member, ranging from 200 to1000 seconds. By default, it is 260 seconds.DescriptionUse the igmp-snooping host-aging-time command to configure the port agingtime of the multicast group members.Use the undo igmp-snooping host-aging-time command to restore the defaultvalue.
