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Configuration Guide - IP Multicast

S7700 and S9700 V200R010C00

This document describes IP multicast basics and how to configure IP multicast features, including IGMP/MLD, PIM (IPv4&IPv6), MSDP, multicast VPN, Layer 3 multicast CAC, Layer 2 multicast CAC, IGMP/MLD snooping, and multicast VLAN, IPv4&IPv6 multicast route management, static multicast MAC address, multicast network.
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MLD Snooping Application

MLD Snooping Application

Networking Description

In Figure 12-5, HostA and HostC on the LAN want to receive video data from the multicast source on the IPv6 PIM network. To prevent broadcast of multicast data on the LAN, MLD snooping needs to be configured on the Layer 2 multicast device (switch). The switch then can accurately forward multicast data on the Layer 2 network, preventing waste of bandwidth and information leakage.

Figure 12-5  MLD snooping network


Perform the following configuration to enable accurate multicast data forwarding on the network shown in Figure 12-5:

  • Enable IPv6 PIM and MLD on the Layer 3 multicast device (router) to forward multicast data to user segments.
  • Enable MLD snooping on the Layer 2 device (switch). The switch then creates and maintains a Layer 2 multicast forwarding table to forward multicast data to specified users.
  • Enable MLD snooping proxy on the switch to prevent the router from processing redundant MLD messages.
Updated: 2019-08-21

Document ID: EDOC1000141903

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