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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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Configured IPv6 Multicast Group Policy Fails to Take Effect

Configured IPv6 Multicast Group Policy Fails to Take Effect

Fault Description

After a multicast group policy is configured on a switch, hosts still receive multicast data sent to other multicast groups out of the specified range.


  1. Run the display acl ipv6 command to check whether the configured ACL6 rules match the multicast group policy.
  2. Run the display mld-snooping configuration command to check whether the multicast group policy configured in a VLAN is correct. If not, run the mld-snooping group-policy command to configure the correct multicast group policy.
  3. Run the display current-configuration command to check whether the switch is enabled to discard unknown multicast packet. If not, run the multicast drop-unknown command to enable the switch to discard unknown multicast packets.
Updated: 2019-08-21

Document ID: EDOC1000141903

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