Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module FTOS Command Line Referen - Page 227

13 Internet Group Management Protocol (IGMP) IGMP Snooping Commands The Dell Force10 operating software (FTOS) supports internet group management protocol (IGMP) snooping version 2 and 3 on all Dell Force10 systems: • ip igmp access-group • ip igmp group-join-limit • ip igmp querier-timeout • ip igmp query-interval • ip igmp query-max-resp-time • ip igmp version • ip igmp snooping enable • ip igmp snooping fast-leave • ip igmp snooping flood • ip igmp snooping last-member-query-interval • ip igmp snooping mrouter • ip igmp snooping querier • show ip igmp snooping mrouter Important Points to Remember for IGMP Snooping • FTOS supports version 1, version 2, and version 3 hosts. • FTOS IGMP snooping implementation is based on IP multicast address (not based on Layer 2 multicast mac-address) and the IGMP snooping entries are in Layer 3 flow table not in Layer 2 forwarding information base (FIB). • FTOS IGMP snooping implementation is based on draft-ietf-magma-snoop-10. • IGMP snooping is supported on all MXL 10/40GbE stack members. • IGMP snooping is not enabled by default on the switch. • A maximum of 1800 groups and 600 virtual local area network (VLAN) are supported. • IGMP snooping is not supported on default VLAN interface. • IGMP snooping is not supported over VLAN-Stack-enabled VLAN interfaces (you must disable IGMP snooping on a VLAN interface before configuring VLAN-Stack-related commands). • IGMP snooping does not react to Layer 2 topology changes triggered by spanning tree protocol (STP). • IGMP snooping reacts to Layer 2 topology changes triggered by multiple spanning tree protocol (MSTP) by sending a general query on the interface that comes in FWD state. Internet Group Management Protocol (IGMP) | 227