Configuration Guide IGMP Snooping Configuration
IGMP Snooping Configuration
Overview
IGMP Snooping
Internet Group Management Protocol, abbreviated as IGMP Snooping, is an IP multicast flow
mechanism running in the VLAN, and used to manage and control the IP multicast flow
forwarding in the VLAN and belongs to the Layer2 multicast funtion. The IGMP Snooping
function described below is in the VLAN, and the related ports are the member ports in the
VLAN.
The device running IGMP Snooping sets up the mapping for the port and the multicast address
by analyzing the received IGMP packets, and forwards the IP multicast packets based on the
mapping. As shown in the Figure-1, with IGMP Snooping enabled, the IP multicast packets are
broadcasted in the VLAN; while without IGMP Snooping enabled, the known IP multicast
packets are not broadcasted in the VLAN but sent to the specified recipient.
Figure-1
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