Configuring Mld Snooping; Overview; Basic Mld Snooping Concepts - HP MSR2003 Configuration Manual

Configuring MLD snooping

In this chapter, "MSR2000" refers to MSR2003. "MSR3000" collectively refers to MSR3012, MSR3024,
MSR3044, MSR3064. "MSR4000" collectively refers to MSR4060 and MSR4080.

Overview

MLD snooping runs on a Layer 2 switch as an IPv6 multicast constraining mechanism to improve multicast
forwarding efficiency. It creates Layer 2 multicast forwarding entries from MLD messages that are
exchanged between the hosts and the router.
As shown in
packets to all hosts. When MLD snooping is enabled, the Layer 2 switch forwards multicast packets of
known IPv6 multicast groups to only the receivers.
Figure 68 Multicast packet transmission processes without and with MLD snooping
The switch in this document refers to an MSR router installed with Layer 2 Ethernet interface modules.

Basic MLD snooping concepts

MLD snooping related ports
As shown in
receiver hosts in an IPv6 multicast group.
Figure 68, when MLD snooping is not enabled, the Layer 2 switch floods IPv6 multicast
Figure 69, MLD snooping runs on Switch A and Switch B, and Host A and Host C are
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