Netgear XCM8810 Chassis Hardware Installation Guide - Page 1170
con igmp snooping forwarding-mode, source-group-vlan S, G.
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NETGEAR 8800 Chassis Switch CLI Manual Slow path flooding is done within the L2 VLAN only. Use the none option to effectively disable slow path flooding. You can use the show igmp command to see the configuration of slow path flooding. Example The following command configures the multicast data stream specified in access1 for slow path flooding: configure igmp snooping flood-list access1 The following command specifies that no policy file is to be used, this effectively disabling slow path flooding: configure igmp snooping flood-list none configure igmp snooping forwarding-mode configure igmp snooping forwarding-mode [group-vlan | source-group-vlan] Description Configures the format for stored multicast entries in hardware as either the default mode (S, G) or the optional mode (*, G). Syntax Description group-vlan source-group-vlan Stores multicast entries in the format (* , GroupIP, VlanId), which is also referred to as (*, G). Stores multicast entries in the format (SourceIP, GroupIP, VlanId), which is also referred to as (S, G). Default source-group-vlan (S, G). Usage Guidelines In networks where there are many sources for each multicast address, the default (S, G) format can consume storage space. To use less storage space for multicast entries, specify the (*, G) format with the group-vlan format. Note: Once the entries are programmed as (*, G), any multicast traffic for the group is forwarded based on the (*, G) entries and does not come to the CPU. Use the group-vlan option only with IGMPv2 networks. 1170 | Chapter 26. IP Multicast Commands