Internet Group Management Protocol (Igmp); Igmp Implementation Information - Dell C9000 Series Networking Configuration Manual

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

• The Dell Networking OS supports IGMP versions 1, 2, and 3 based on RFCs 1112, 2236, and 3376,
respectively.
• The system does not support IGMP version 3 and versions 1 or 2 on the same subnet.
• Dell Networking switches cannot serve as an IGMP host or an IGMP version 1 IGMP Querier.
• The system automatically enables IGMP on interfaces on which you enable a multicast routing protocol.
Topics:
• IGMP Protocol Overview
• Configure IGMP
• Viewing IGMP Enabled Interfaces
• Selecting an IGMP Version
• Viewing IGMP Groups
• Enabling IGMP Immediate-Leave
• IGMP Snooping
• Fast Convergence after MSTP Topology Changes
• Designating a Multicast Router Interface
Protocol (IGMP)

Internet Group Management Protocol (IGMP)

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