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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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Upstream Interface in Multicast Forwarding Entries Is Incorrect

Upstream Interface in Multicast Forwarding Entries Is Incorrect

Fault Description

After multicast routing configuration is complete, Protocol Independent Multicast (PIM) routing entries are created. However, the upstream interface in multicast forwarding entries is incorrect, and multicast data cannot be sent to user network segments.

Procedure

  1. Run the display multicast forwarding-table command to check whether the upstream interface in multicast forwarding entries is a loopback interface.

    If the upstream interface is a loopback interface, a possible reason is that the source IP address of multicast data packets is the same as a VLANIF interface address on the device. In this case, change the multicast source address or the VLANIF interface address. Ensure that the two IP addresses are different but remain on the same network segment.

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Updated: 2019-08-21

Document ID: EDOC1000141903

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