igmp-snooping report-listening (Sub-interface view)

Usage Scenario

In VPLS scenarios, QinQ stacking or mapping sub-interfaces remove VLAN tags from received multicast messages. To enable the function to listen to Report and Leave messages on QinQ stacking or mapping sub-interfaces and configure a multicast message replication mode, run the igmp-snooping report-listening command.

Prerequisites

QinQ stacking or mapping sub-interfaces have been configured in a VSI for which the command is to be run.

QinQ stacking or mapping has been configured on a sub-interface for which the command is to be run.

Precautions

The command configuration in a sub-interface view does not take effect if QinQ stacking or mapping is not configured for the sub-interface.

The command configuration in a VSI view does not take effect if the igmp-snooping qinq-stacking report-listening enable or igmp-snooping qinq-mapping report-listening enable command has not been run for the VSI.

If QinQ stacking or mapping sub-interfaces are configured for the VSI, the igmp-snooping qinq-stacking report-listening enable or igmp-snooping qinq-mapping report-listening enable command must be run earlier than the igmp-snooping enable command.

If QinQ stacking or mapping sub-interfaces are configured for the VSI and the VSI is bound to a user instance, the igmp-snooping qinq-stacking report-listening enable or igmp-snooping qinq-mapping report-listening enable command must be run for the multicast instance of the user instance earlier than the igmp-snooping enable command.

If multicast message replication modes are configured in both the VSI and QinQ sub-interface views, the configuration in the QinQ sub-interface view has a higher priority. The configuration in the VSI view takes effect for a QinQ sub-interface only if a replication mode is not configured in the QinQ sub-interface view.

If the

igmp-snooping report-listening command has been run for a QinQ sub-interface of a VSI, the following operations are not allowed:

• If the sub-interface type is QinQ stacking, running the undo igmp-snooping qinq-stacking report-listening enable command in the VSI view is not allowed.
• If the sub-interface type is QinQ mapping, running the undo igmp-snooping qinq-mapping report-listening enable command in the VSI view is not allowed.
• If the VSI of the QinQ stacking or mapping sub-interface is bound to a user VSI, running the undo igmp-snooping qinq-stacking report-listening enable or undo igmp-snooping qinq-mapping report-listening enable command for the multicast VSI of the user VSI is not allowed.
• Disabling the function to listen to Report and Leave messages in the user VSI of the QinQ sub-interface is not allowed.
  The igmp-snooping report-listening command supports QinQ stacking interfaces without a policy not the interfaces that are configured with the parameters in the qinq stacking vid 8021p command. These interfaces do not support Layer 2 multicast services.