Users Guide

12
Internet Group Management Protocol (IGMP)
The Dell Networking OS supports IGMP snooping version 2 and 3 on all Dell Networking systems.
IGMP Commands
The Dell Networking OS supports the following IGMP commands:
• clear ip igmp groups
• debug ip igmp
• ip igmp group-join-limit
• ip igmp querier-timeout
• ip igmp query-interval
• ip igmp query-max-resp-time
• ip igmp snooping enable
• ip igmp snooping fast-leave
• ip igmp snooping ood
• ip igmp snooping last-member-query-interval
• ip igmp snooping mrouter
• ip igmp snooping querier
• ip igmp version
• show ip igmp groups
• show ip igmp interface
• show ip igmp snooping mrouter
Important Points to Remember
• Dell Networking OS supports version 1, version 2, and version 3 hosts.
• Dell Networking OS 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 ow table not in Layer 2 forwarding information base (FIB).
• Dell Networking OS IGMP snooping implementation is based on draft-ietf-magma-snoop-10.
• IGMP snooping is supported on all M I/O Aggregator stack members.
• IGMP snooping is enabled by default on the switch.
• A maximum of 8k groups and 4k virtual local area networks (VLAN) are supported.
• IGMP snooping is not supported on default VLAN interface.
• Flooding of unregistered multicast trac is enabled by default.
• Queries are not accepted from the server side ports and are only accepted from the uplink LAG.
• Reports and Leaves are ooded by default to the uplink LAG irrespective of whether it is an mrouter port or not.
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Internet Group Management Protocol (IGMP)