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Configuration Guide - IP Multicast

S7700 and S9700 V200R013C00

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, IPv4 PIM, IPv6 PIM, MSDP, multicast VPN, layer 3 multicast CAC, IPv4 multicast route management, IPv6 multicast route management, IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN replication, layer 2 multicast CAC, multicast network management.
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Hosts Cannot Receive Multicast Data

Hosts Cannot Receive Multicast Data

Fault Description

Hosts cannot receive multicast data after Layer 2 multicast CAC is configured.


  • Check whether the number of multicast forwarding entries has reached the Layer 2 multicast CAC limit. If so, new forwarding entries cannot be generated.

    Run the display l2-multicast limit command on the switch to check the Layer 2 multicast CAC configuration and statistics.

    If the CAC counter value reaches the configured CAC limit, increase the CAC limit value to allow users to join new groups. Then run the display igmp-snooping port-info command to check whether new Layer 2 multicast entries are generated.

Updated: 2019-04-08

Document ID: EDOC1100065742

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