Fundamentals of MLD snooping
As shown in Figure 82, when MLD snooping is not enabled, the Layer 2 switch floods IPv6 multicast packets all hosts in a VLAN or VSI. When MLD snooping is enabled, the Layer 2 switch forwards multicast packets of known IPv6 multicast groups to only the receivers.
Figure 82: Multicast packet transmission processes without and with MLD snooping
