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NE40E V800R010C10SPC500 Configuration Guide - IP Multicast 01

This is NE40E V800R010C10SPC500 Configuration Guide - IP Multicast
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Configuring Layer 2 SSM Mapping

Configuring Layer 2 SSM Mapping

After Source-Specific Multicast (SSM) mapping is configured on a device directly connected to hosts running IGMPv1 or IGMPv2 on a Layer 2 network, these hosts can use IGMPv3 services. Before configuring Layer 2 SSM mapping, familiarize yourself with the usage scenario, complete the pre-configuration tasks, and obtain the data required for the configuration.

Usage Scenario

Compared with Any-Source Multicast (ASM), SSM uses less multicast group addresses and is more secure. Only IGMPv3 supports SSM, but while many multicast devices currently support IGMPv3, most previously deployed multicast terminals only support IGMPv1 or IGMPv2. The SSM mapping mechanism enables devices running IGMPv3 to provide SSM services for hosts running IGMPv1 or IGMPv2.

SSM mapping can be used to convert IGMPv1 or IGMPv2 (*, G) messages, within an SSM group address range, to IGMPv3 (S, G) messages. This allows hosts running IGMPv1 or IGMPv2 to obtain SSM services.

Pre-configuration Tasks

Before configuring Layer 2 SSM mapping, complete the following task:

  • Enable global IGMP snooping.

Data Preparation

To configure Layer 2 SSM mapping, you need the following data.

No.

Data

1

(Optional) ACL rule used to define an SSM group address range, and VSI name or VLAN ID

2

Multicast group and source addresses between which a mapping is set up and IGMP snooping version

Configuration Procedures

You can choose to perform the following configuration tasks (except Checking the Configuration) according to the usage scenario.

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Updated: 2019-01-03

Document ID: EDOC1100055017

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