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CLI-based Configuration Guide - IP Multicast

AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R007

This document describes the principles and configurations of IP multicast, and provides configuration examples.
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Configuring a Share-Group and Binding an MTI

Configuring a Share-Group and Binding an MTI

When configuring an IPv4 multicast VPN, you need to configure a Share-Group address and the MTI to be bound to the VPN instance.


An MD is a group of VPN instances that can transmit and receive multicast packets between PEs.Different VPN instances belong to different MDs. An MD serves a specific VPN. All private multicast data transmitted in the VPN is transmitted in the MD. All VPN instances on the PEs that belong to an MD need to join the same multicast group, which is called the Share-Group. A multicast distribution tree (MDT) is set up on the public network to transmit PIM packets and multicast data packets between PEs in the MD.

Multicast Tunnel Interfaces (MTIs) are the ingress and egress of the MDT in the public network. A PE in a VPN sends VPN data through an MTI, and a remote PE receives the data through another MTI. MTIs enable interaction between the public network instance and VPN instances on PEs.


One Share-Group address cannot be configured for different VPN instances on a PE.

In MD VPN, the value range of a Share-Group address is the same as that of an Any-Source Multicast (ASM) group address range.

In BGP A-D multicast VPN, the value range of a Share-Group address is the same as that of an Source-Specific Multicast (SSM) group address range.


  1. Run:


    The system view is displayed.

  2. Run:

    ip vpn-instance vpn-instance-name

    The VPN instance view is displayed.

  3. Run:


    The VPN instance IPv4 address family is enabled and its view is displayed.

  4. Run:

    multicast-domain share-group group-address binding mtunnel number

    A Share-Group is configured. The system automatically creates an MTI, and then binds the Share-Group to the MTI and binds the MTI to the VPN instance IPv4 address family.


    After an MTI is created using the command in this step, the system automatically configures PIM on the MTI. You do not need to configure PIM on this MTI.

    PIM-SM is enabled on an MTI by default. If a physical interface configured with a PIM mode exists in the same VPN with an MTI, the PIM mode of the MTI will be the same as that of the physical interface.

Updated: 2019-06-12

Document ID: EDOC1000097181

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