Chapter 26 Igmp Snooping; Introduction To Igmp Snooping; Igmp Snooping Configuration Task - Edge-Core ES4624-SFP Basic Management Manual

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Chapter 26 IGMP Snooping

IGMP (Internet Group Management Protocol) is a protocol used in IP multicast.

IGMP is used by multicast enabled network device (such as a router) for host

membership query, and by hosts that are joining a multicast group to inform the router to

accept packets of a certain multicast address. All those operations are done through

IGMP message exchange. The router will use a multicast address (224.0.0.1) that can

address to all hosts to send a IGMP host membership query message. If a host wants to

join a multicast group, it will reply to the multicast address of that a multicast group with a

IGMP host membership reports a message.

IGMP Snooping is also referred to as IGMP listening. The switch prevents multicast

traffic from flooding through IGMP Snooping, multicast traffic is forwarded to ports

associated to multicast devices only. The switch listens to the IGMP messages between

the multicast router and hosts, and maintains multicast group forwarding table based on

the listening result, and can then decide to forward multicast packets according to the

forwarding table.

ES4624-SFP/ES4626-SFP switch provides IGMP Snooping and is able to send a

query from the switch so that the user can use ES4624-SFP/ES4626-SFP switch in IP

1. Enable IGMP Snooping

2. Configure IGMP Snooping

1. Enable IGMP Snooping

ip igmp snooping

no ip igmp snooping

2. Configure IGMP Snooping

Enables IGMP Snooping