2-8Operation Command RemarksConfigure a multicast group filter igmp-snooping group-policyacl-number [ vlan vlan-list ]OptionalNo group filter is configured bydefault, namely hosts can join anymulticast group.z A port can belong to multiple VLANs, you can configure only one ACL rule per VLAN on a port.z If no ACL rule is configured, all the multicast groups will be filtered.z Since most devices broadcast unknown multicast packets by default, this function is often usedtogether with the function of dropping unknown multicast packets to prevent multicast streams frombeing broadcast as unknown multicast packets to a port blocked by this function.z The configuration performed in system view takes effect on all ports of the switch if no VLAN isspecified; if one or more VLANs are specified, the configuration takes effect on all ports in thespecified VLAN(s).z The configuration performed in Ethernet port view takes effect on the port no matter which VLAN itbelongs to if no VLAN is specified; if one or more VLANs are specified, the configuration takeseffect on the port only if the port belongs to the specified VLAN(s).Configuring the Maximum Number of Multicast Groups on a PortBy configuring the maximum number of multicast groups that can be joined on a port, you can limit thenumber of multicast programs on-demand available to users, thus to regulate traffic on the port.Table 2-10 Configure the maximum number of multicast groups on a portOperation Command RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Configure the maximum number ofmulticast groups allowed on theportigmp-snooping group-limit limit[ vlan vlan-list[ overflow-replace ] ]RequiredFor the S3100-SI series, thesystem default is 256.For the S3100-EI series, thesystem default is 512.
