H3C Technologies H3C S7500E Series Switches - Manual (Page 126)

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To do… Use the command… Remarks
Enter interface view
interface interface-type
interface-number
—
Enable the IGMP SSM
mapping feature
igmp ssm-mapping enable
Required
Disabled by default
To ensure SSM service for all hosts on a subnet, regardless of the IGMP version running on the
hosts, enable IGMPv3 on the interface that forwards multicast traffic onto the subnet.
Configuring SSM Mappings
By performing this configuration multiple times, you can map a multicast group to different
multicast sources.
Follow these steps to configure an IGMP SSM mapping:
To do… Use the command… Remarks
Enter system view system-view —
Enter public instance or
VPN instance IGMP view
igmp [ vpn-instance
vpn-instance-name ]
—
Configure an IGMP SSM
mapping
ssm-mapping group-address { mask
| mask-length } source-address
Required
No IGMP mappings are
configured by default.
If IGMPv3 is enabled on a VLAN interface, and if a port in that VLAN is configured as a
simulated host, the simulated host will send IGMPv3 reports even if you did not specify a
multicast source when configuring simulated joining with the igmp-snooping host-join
command. In this case, the corresponding multicast group will not be created based on the
configured IGMP SSM mappings. For details about the igmp-snooping host-join command,
refer to IGMP Snooping Configuration Commands in the IP Multicast Command Reference.