Dell S4048T User Manual

Internet Group Management
Protocol (IGMP)
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
• Dell Networking Operating System (OS) supports IGMP versions 1, 2, and 3 based on RFCs 1112, 2236,
and 3376, respectively.
• Dell Networking OS does not support IGMP version 3 and versions 1 or 2 on the same subnet.
• IGMP on Dell Networking OS supports an unlimited number of groups.
• Dell Networking systems cannot serve as an IGMP host or an IGMP version 1 IGMP Querier.
• Dell Networking OS 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
• Adjusting Timers
• Preventing a Host from Joining a Group
• Enabling IGMP Immediate-Leave
• IGMP Snooping
• Fast Convergence after MSTP Topology Changes
• Egress Interface Selection (EIS) for HTTP and IGMP Applications
• Designating a Multicast Router Interface
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Internet Group Management Protocol (IGMP) 425

Dell S4048T Specifications

General

Switching Capacity	1.44 Tbps
Rack Units	1U
Form Factor	Rack-mountable
Power Device	Internal power supply
Power Redundancy	Optional
Product Type	Switch
Jumbo Frame Support	Yes
Routing Protocol	OSPF, BGP, RIP, VRRP, PIM-SM, IGMP
Remote Management Protocol	SNMP, RMON, Telnet, SSH
Features	Quality of Service (QoS), Jumbo Frames Support, Virtual Route Redundancy Protocol (VRRP), VLAN support, sFlow, Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP), IPv6 support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3ae
Dimensions (W x D x H)	17.3 in x 16 in x 1.7 in
Operating Temperature	0°C to 40 °C
Operating Humidity	10% to 90% (non-condensing)