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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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Before You Start

Before You Start

Before configuring inter-AS MVPN, familiarize yourself with the usage scenario, complete the pre-configuration tasks, and obtain the data required for the configuration.

Usage Scenario

Multicast services are widely applied, and more and more users require multicast services. Sometimes, users and multicast sources from which the users want to obtain multicast data may reside in areas that span multiple ASs. As shown in Figure 7-21, ASs 100 and 200 are deployed between Source 1 and PC3. Source 1 is required to provide multicast services for PC3. Inter-AS MVPN must be deployed to enable Source 1 to provide multicast services for PC3.

Figure 7-21  Inter-AS MVPN networking

Two inter-AS VPN solutions can be used: Options A and B. Furthermore, three inter-AS MVPN modes have been developed for the three solutions.

Table 7-2  Comparison of inter-AS MVPN modes

Inter-AS MVPN Mode

Deployment Scenario

Supported Model

Option A

Recommended if both the number of VPNs that are to access Provider Edges (PEs) and the number of VPN routes are small.

Any-Source Multicast (ASM) and Source-Specific Multicast (SSM)

Option B

Recommended if an autonomous system boundary router (ASBR) can manage VPN routes, but there are not enough interfaces for all inter-autonomous system (AS) VPNs.



Inter-AS MVPN does not support a switchover to the switch-MDT.

Pre-configuration Tasks

Before configuring inter-AS MVPN, complete the following tasks:

  • Configuring inter-AS BGP/MPLS IP VPN (Option A and B)

  • Configuring multicast functions on the public network

Data Preparation

To configure inter-AS MVPN, you need the following data.




VPN instance name and Route Distinguisher (RD)


Share-group address


Multicast Tunnel Interface (MTI) address


(Optional) Maximum Transmission Unit (MTU) of an MTI

Updated: 2019-06-12

Document ID: EDOC1000097181

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