Multicast Listener Discovery (MLD) Overview

Multicast Listener Discovery (MLD) is a protocol used by an IPv6 host to register its IP multicast group membership with a router. To receive multicast traffic, a host must explicitly join a multicast group by sending an MLD report; then, the traffic is forwarded to that host. Periodically, the router queries the multicast group to see if the group is still in use. If the group is still active, a single IP host responds to the query, and group registration is maintained.

MLD is the IPv6 equivalent to IGMP, and MLDv1 is equivalent to IGMPv2. The ExtremeXOS software supports both MLDv1 and MLDv2 protocol.
Note

Note

This release does not support MVR, PVLAN, VLAN Aggregation, and Multicast Troubleshooting tools for MLD/IPv6.