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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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Configuration Notes

Configuration Notes

Network Element Involved

An IPv4 multicast network consists of the following network elements:
  • Multicast source

    A device that sends multicast data to receiver hosts. For example, a video server is a multicast source.

  • IPv4 Protocol Independent Multicast (PIM) device

    A device that uses the PIM (IPv4) protocol to generate and maintain multicast routing entries and forwards multicast data based on multicast routing entries. On an IPv4 multicast network, all Layer 3 devices must run PIM (IPv4); otherwise, multicast forwarding paths cannot be established.

  • Multicast Source Discovery Protocol (MSDP) device

    A device that forwards multicast data from one PIM network to another. For example, if multicast data needs to be transmitted between two autonomous systems (ASs), the devices at the border of the ASs must run the MSDP protocol.

  • IGMP querier

    A device that exchanges IGMP messages with receiver hosts to create and maintain group memberships. On a multicast network, Layer 3 devices connected to network segments of receivers must run the IGMP protocol or be configured with static IGMP groups. Otherwise, upstream PIM devices cannot know the multicast groups that users want to join, and therefore cannot establish multicast forwarding paths.

  • IGMP snooping device

    A device that listens on IGMP messages exchanged between upstream Layer 3 multicast devices and receiver hosts to create and maintain Layer 2 multicast forwarding entries, which are used for accurate multicast data forwarding on a Layer 2 network. To prevent broadcasting of multicast packets on a Layer 2 network and conserve network bandwidth, it is recommended that you configure IGMP snooping on Layer 2 devices.

  • Receiver

    A multicast user that receives multicast data. A receiver can be a PC, a set top box, or any device with multicast client installed.

License Support

IGMP snooping is a basic feature of a router and is not under license control.

Feature Dependency and Limitation

Note the following when configuring IGMP snooping on the router:

  • Because IGMP snooping is a Layer 2 multicast feature, all the IGMP snooping configurations on interfaces mentioned in this chapter are performed on Layer 2 physical interfaces, including Eth-Trunk interfaces.
NOTE:

AR120&AR150&AR160&AR200&AR1200 series do not support IGMP Snooping.

Only the 8FE1GE, 24GE and 24ES2GP cards support IGMP Snooping.

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Updated: 2019-06-12

Document ID: EDOC1000097181

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