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Configuration Guide - IP Multicast

S7700 and S9700 V200R010C00

This document describes IP multicast basics and how to configure IP multicast features, including IGMP/MLD, PIM (IPv4&IPv6), MSDP, multicast VPN, Layer 3 multicast CAC, Layer 2 multicast CAC, IGMP/MLD snooping, and multicast VLAN, IPv4&IPv6 multicast route management, static multicast MAC address, multicast network.
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Configuring the Multicast Forwarding Table Optimization Mode

Configuring the Multicast Forwarding Table Optimization Mode


By default, the system preferentially allocates hardware resources to IP routing tables, and the MFIB shares hardware resources with the Address Resolution Protocol (ARP) cache table.

If a large number of ARP cache entries and multicast forwarding entries share hardware resources, you can configure the multicast forwarding table optimization mode. In this mode, the system preferentially allocates hardware resources to the MFIB, and the ARP cache table shares hardware resources with IP routing tables.

After you configure the optimization mode or restore the default mode, the system will display a message asking you whether to restart the device. If you do not respond to the message, the system returns to the system view and does not restart. A restart will cause a short-term service interruption, so this command is not recommended.


This function is not supported by X series and EE series cards.


  1. Run:


    The system view is displayed.

  2. Run:

    set multicast forwarding-table optimization-mode [ slot slot-id ]

    The multicast forwarding table optimization mode is configured.

Updated: 2019-08-21

Document ID: EDOC1000141903

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