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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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(S, G) Entries Are Not Generated After IGMP SSM Mapping Is Enabled

(S, G) Entries Are Not Generated After IGMP SSM Mapping Is Enabled

Fault Description

An interface is enabled with source-specific multicast (SSM) mapping and IGMP, and is configured with a static SSM mapping policy. The interface has received IGMPv1 or IGMPv2 Report messages, but the multicast forwarding information base (MFIB) table does not contain the (S, G) entries matching the SSM mapping entries.


  1. Check whether G in the (*, G) Report message is in the SSM group address range.

    Run the display this command in the PIM view to check the current configuration. If the command output displays "ssm-policy", the SSM group address range is redefined on the device.

    Run the display acl { acl-number | name acl-name | all } command to check the ACL configuration. Ensure that G is in the SSM group address range. By default, the SSM group address range is to

Updated: 2019-08-21

Document ID: EDOC1000141903

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