ES4710BD 10 Slots L2/L3/L4 Chassis Switch
Chapter11 IGMP Snooping Configuration
11.1 Introduction to IGMP Snooping
IGMP (Internet Group Management Protocol) is a protocol used in IP multicast. IGMP is used by multicast enabled network devices (such as a routers) 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.
ES4710BD provides IGMP Snooping and is able to send a query from the switch so that the user can use ES4710BD in IP multicast.
11.2 IGMP Snooping Configuration
11.2.1IGMP Snooping Configuration Task
1.Enable IGMP Snooping
2.Configure IGMP Snooping
3.Configure sending of IGMP Query
1. Enable IGMP Snooping
Command | Explanation |
Global Mode |
|
ip igmp snooping | Enables IGMP Snooping |
no ip igmp snooping |
|
2. Configure IGMP Snooping |
|
Command
Global Mode
Explanation
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