HP 6125G HP 6125G & 6125G/XG Blade Switches IP Multicast Configuration - Page 101
Configuring IGMP SSM mapping, Enabling SSM mapping
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Configuring IGMP SSM mapping Because of some possible restrictions, some receiver hosts on an SSM network might run IGMPv1 or IGMPv2. To provide SSM service support for these receiver hosts, configure the IGMP mapping feature on the last-hop router. Before you configure the IGMP SSM mapping feature, complete the following tasks: • Configure any unicast routing protocol so that all devices in the domain are interoperable at the network layer. • Configure basic IGMP functions. Enabling SSM mapping Step 1. Enter system view. 2. Enter interface view. 3. Enable the IGMP SSM mapping feature. Command system-view interface interface-type interface-number igmp ssm-mapping enable Remarks N/A N/A Disabled by default NOTE: 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. If IGMPv3 is enabled on a VLAN interface of a switch, 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 you configure 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 more information about the igmp-snooping host-join command, see IP Multicast Command Reference. To configure an IGMP SSM mapping: Step Command 1. Enter system view. system-view 2. Enter IGMP view. igmp 3. Configure an IGMP SSM ssm-mapping group-address { mask | mapping. mask-length } source-address Remarks N/A N/A No IGMP mappings are configured by default. Configuring IGMP proxying Before you configure the IGMP proxying feature, complete the following tasks: 90
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