igmp proxy backup

Function

The igmp proxy backup command configures a backup IGMP proxy interface.

The undo igmp proxy backup command cancels the configuration.

By default, no backup IGMP proxy interface is configured.

Format

igmp proxy backup

undo igmp proxy backup

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.

Parameters

None

Views

GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, VLANIF interface view, loopback interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Generally, the IGMP proxy function becomes unavailable if the upstream interface with IGMP proxy configured fails. To enhance reliability of the IGMP service, configure a backup IGMP proxy interface after configuring IGMP proxy on the upstream interface. If the upstream interface fails, the backup interface takes over the IGMP proxy service to resume multicast services.

Prerequisites

IP multicast routing has been enabled using the multicast routing-enable command.

Precautions

An instance allows only one IGMP proxy interface and one backup IGMP proxy interface. Only one backup IGMP proxy interface can be configured on a device.

IGMP proxy conflicts with the following features:

PIM: If the pim sm or pim dm command has been configured on an interface, the igmp proxy backup command cannot be used on the interface. If the igmp proxy backup command is configured first, the pim sm or pim dm command cannot be used on the interface.
IGMP: If the igmp enable command has been configured on an interface, the igmp proxy backup command cannot be used on the interface. If the igmp proxy backup command is configured first, the igmp enable command cannot be used on the interface.
Static group: After a static group is configured on an interface, the igmp proxy backup command cannot be used on the interface. If the igmp proxy backup command has been configured, no static group can be configured on the interface.
If two or more IGMP proxy interfaces have been configured on a device, the device's other interfaces cannot be configured as backup IGMP proxy interfaces.

Example

# Configure VLANIF100 as a backup IGMP proxy interface.

<HUAWEI> system-view
[HUAWEI] multicast routing-enable
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] igmp proxy backup