The igmp ssm-mapping enable command enables SSM mapping on an interface.
The undo igmp ssm-mapping enable command disables SSM mapping on an interface.
By default, SSM mapping is disabled on an interface.
GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, GE sub-interface view, XGE sub-interface view, MultiGE sub-interface view, 25GE sub-interface view, 40GE sub-interface view, 100GE sub-interface view, Eth-Trunk sub-interface view, VLANIF interface view, loopback interface view
Usage Scenario
The SSM model allows only IGMPv3 hosts to specify the multicast sources which they want to receive data from. However, some hosts can only run IGMPv1 or IGMPv2. To enable these hosts to use the SSM service, configure IGMP SSM mapping on the switch. IGMP SSM mapping is implemented based on static SSM mapping entries on the switch. The switch converts (*, G) information in IGMPv1 and IGMPv2 Report messages to (S, G) information according to static SSM mapping entries to provide the SSM service for IGMPv1 and IGMPv2 hosts.
The igmp ssm-mapping enable command enables SSM mapping on an interface. The mappings between multicast source addresses and group addresses take effect only when SSM mapping is enabled on an interface. SSM mappings are configured using the ssm-mapping command.
Prerequisites
IP multicast routing has been enabled using the multicast routing-enable command.
Precautions
The SSM mapping function takes effect on an interface only when the interface runs IGMPv3.
# Enable SSM mapping on VLANIF100.
<HUAWEI> system-view [HUAWEI] multicast routing-enable [HUAWEI] interface vlanif 100 [HUAWEI-Vlanif100] igmp ssm-mapping enable
<HUAWEI> system-view [HUAWEI] multicast routing-enable [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] undo portswitch [HUAWEI-GigabitEthernet0/0/1] igmp ssm-mapping enable