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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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Understanding Multicast VLAN Replication

Understanding Multicast VLAN Replication

Multicast VLAN Replication Based on User VLANs

Switches support the binding between multicast and user VLANs, allowing multicast packet replication in different user VLANs. This binding is the core of the multicast VLAN replication function. In Figure 12-1, the upstream router only needs to send one copy of the multicast data to the switch configured with multicast VLAN replication. The switch then copies multicast data and sends the data to different user VLANs. This reduces bandwidth consumption between the upstream router and the switch.
Figure 12-1 VLAN-based multicast VLAN replication

Interface-based Multicast VLAN Replication

Switches support the binding between user and multicast VLANs on user-side interfaces. This allows multicast data to be replicated for different user VLANs and implements interface-based multicast service isolation.

In Figure 12-2, ISP1 and ISP2 provide multicast services on the network. HostA and HostB obtain multicast services from ISP1, whereas HostC and HostD obtain multicast services from ISP2. To prevent multicast data from being sent to all hosts, the following configuration can be performed: Configure MVLAN1 and MVLAN2 for ISP1 and ISP2, respectively. Bind UVLAN to MVLAN1 on access interfaces of HostA and HostB. Bind UVLAN to MVLAN2 on access interfaces of HostC and HostD. In this way, multicast data provided by ISP1 is sent to HostA and HostB, and multicast data provided by ISP2 is sent to HostC and HostD.

Figure 12-2 Interface-based multicast VLAN replication

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Updated: 2019-04-20

Document ID: EDOC1100075361

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