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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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Dropping Unknown Multicast Flows

Dropping Unknown Multicast Flows

Context

Unknown multicast flows are multicast data flows that match no entry in the multicast forwarding table. By default, the router broadcasts unknown multicast flows in the corresponding VLAN. Dropping unknown multicast flows reduces instant bandwidth usage compared with the broadcast mode.

NOTE:

AR2204-24GE, AR2204-27GE, AR2204-27GE-P, AR2204-48GE-P, AR2204-51GE-P, AR2204E, AR2220L, AR2220E and AR2240C cannot be configured to drop unknown multicast flows.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    vlan vlan-id

    The VLAN view is displayed.

  3. Run:

    multicast drop-unknown

    The router is configured to drop unknown multicast flows.

    NOTE:

    After the multicast drop-unknown command is configured, the router drops all unknown multicast packets, including the protocol packets that are transparently transmitted within the VLAN and use the reserved multicast address.

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Updated: 2019-06-12

Document ID: EDOC1000097181

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