Overview MLD snooping

MLD Snooping is short for Multicast Listener Discovery Snooping. It is an IPv6 multicast constraint mechanism running on L2 devices, used to manage and control IPv6 multicast groups.

MLD Snooping mainly realizes the following functions:

• Listen for MLD packets to establish multicast information. MLD Snooping obtains information about the downstream multicast receiver by listening for MLD packets and forwards multicast service packets on designated member ports.
• Listen for MLD packets. In this way, the upstream multicast router can correctly maintain the MLD member relation table.