Dell Force10 MXL Blade - Internet Group Management Protocol (IGMP); IGMP Snooping Commands; Important Points to Remember for IGMP Snooping

Internet Group Management Protocol (IGMP) | 227
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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.