Internet Group Management
Internet group management protocol (IGMP) is a Layer 3 multicast protocol that hosts use to join or leave a
multicast group.
Multicast is premised on identifying many hosts by a single destination IP address; hosts represented by the
same IP address are a multicast group. Multicast routing protocols (such as protocol-independent multicast
[PIM]) use the information in IGMP messages to discover which groups are active and to populate the
multicast routing table.
IGMP Implementation Information
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Dell Networking Operating System (OS) supports IGMP versions 1, 2, and 3 based on RFCs 1112, 2236,
and 3376, respectively.
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Dell Networking OS does not support IGMP version 3 and versions 1 or 2 on the same subnet.
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IGMP on Dell Networking OS supports an unlimited number of groups.
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Dell Networking systems cannot serve as an IGMP host or an IGMP version 1 IGMP Querier.
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Dell Networking OS automatically enables IGMP on interfaces on which you enable a multicast routing
protocol.
Topics:
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IGMP Protocol Overview
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Configure IGMP
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Viewing IGMP Enabled Interfaces
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Selecting an IGMP Version
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Viewing IGMP Groups
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Adjusting Timers
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Preventing a Host from Joining a Group
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Enabling IGMP Immediate-Leave
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IGMP Snooping
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Fast Convergence after MSTP Topology Changes
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Egress Interface Selection (EIS) for HTTP and IGMP Applications
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Designating a Multicast Router Interface
Protocol (IGMP)
Internet Group Management Protocol (IGMP)
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