The l2-multicast backup-report forward command configures the switch to forward IGMP Report/Leave messages to the backup PW.
The undo l2-multicast backup-report forward command disables the switch from forwarding IGMP Report/Leave messages to the backup PW.
By default, the switch does not forward IGMP Report/Leave messages to the backup PW.
l2-multicast backup-report forward [ source-mac-replace ]
undo l2-multicast backup-report forward
| Parameter | Description | Value |
|---|---|---|
| source-mac-replace | Replaces the source MAC addresses in Report/Leave messages to the device MAC address before forwarding the Report/Leave messages. | - |
Usage Scenario
Generally, two PWs are deployed on a VPLS network to ensure reliable service traffic transmission. The two PWs provide redundancy protection for service transmission. If IGMP snooping over VPLS is configured on the switch, the switch does not forward IGMP protocol packets to the backup PW by default. In this case, devices on the backup PW cannot create Layer 2 multicast forwarding entries because they cannot receive IGMP protocol packets. When the primary PW is Down and the backup PW becomes the new primary PW, multicast data traffic will be interrupted for a short time because devices on the new primary PW have not learned Layer 2 multicast forwarding entries. To solve this problem, configure the switch to forward IGMP protocol packets to the backup PW so that multicast data traffic can be quickly switched to the new primary PW.
This command configures the switch to forward IGMP Report/Leave messages to the backup PW.
Prerequisites
IGMP snooping has been enabled globally using the igmp-snooping enable (system view) command.
Precautions
The configuration takes effect only when IGMP snooping is enabled in the VSI using the igmp-snooping enable (VSI view) command.