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Configuration Guide - IP Multicast

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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Summary of MLD Snooping Configuration Tasks

Summary of MLD Snooping Configuration Tasks

Table 10-5 lists MLD snooping configuration tasks.

Table 10-5 MLD snooping configuration tasks

Scenario

Description

Task

Configuring Basic MLD Snooping Functions

On an IPv6 network, when multicast data is forwarded to a Layer 2 multicast device on a user network segment, you can configure basic MLD snooping functions on the device to implement accurate forwarding of multicast data on the data link layer. With MLD snooping configured, the device listens to and analyzes MLD packets exchanged between multicast users and the upstream router, and creates Layer 2 multicast forwarding entries based on MLD packet information. Multicast data packets are then forwarded based on the Layer 2 multicast forwarding entries, instead of being broadcast on the Layer 2 network.

Configuring Basic MLD Snooping Functions

Configuring MLD Snooping Proxy

You can configure MLD snooping proxy on a Layer 2 multicast device in either of the following situations:

  • MLD is not enabled on Layer 3 multicast devices, for example, a static multicast group is configured, and there is no MLD querier on the network to maintain group membership.

    With MLD snooping proxy configured, a Layer 2 multicast device can send Query messages to function as an MLD querier.

  • MLD is enabled on Layer 3 multicast devices.

    To reduce the number of MLD Report and Leave messages exchanged between Layer 3 and Layer 2 multicast devices, you can configure MLD snooping proxy on the Layer 2 multicast device. Then this device substitutes the upstream Layer 3 multicast device to send Query messages to user hosts, and substitutes user hosts to send Report and Leave messages to the Layer 3 multicast device.

Configuring MLD Snooping Proxy

Configuring an MLD Snooping Policy

To filter multicast packets on a Layer 2 multicast device or limit the range of multicast groups that hosts can join, configure an MLD snooping policy on the device.

Configuring an MLD Snooping Policy

Configuring Membership Fast-Update

To improve multicast service efficiency and user experience, configure membership fast-update on a Layer 2 multicast device so that the device can respond rapidly when a member joins or leaves a multicast group.

The membership fast-update function enables a multicast device to quickly respond to hosts' joining or leaving multicast groups. This feature helps improve multicast service efficiency and user experience.

Configuring MLD Snooping Membership Fast-Update

Configuring MLD Snooping SSM Mapping

On a Layer 2 network, if some hosts can run only MLDv1, to enable such hosts to obtain the SSM service, configure MLD snooping SSM mapping on a Layer 2 multicast device.

Configuring MLD Snooping SSM Mapping
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Updated: 2019-04-20

Document ID: EDOC1100075361

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