multicast user-aggregation

Function

The multicast user-aggregation command enables multicast replication by multicast VLAN.

The undo multicast user-aggregation command restores the default configuration.

By default, multicast replication by multicast VLAN is disabled, and multicast replication by interface is used.

Format

multicast user-aggregation { vlan vlan-id | qinq pe-vid pe-vid ce-vid ce-vid }

undo multicast user-aggregation

Parameters

Parameter	Description	Value
vlan vlan-id	Specifies the ID of a VLAN used for multicast traffic aggregation.	The value is an integer ranging from 1 to 4094.
qinq	Specifies a qinq interface.	-
pe-vid pe-vid	Specifies an outer VLAN tag.	The value is an integer ranging from 1 to 4094.
ce-vid ce-vid	Specifies an inner VLAN tag.	The value is an integer ranging from 1 to 4094.

Views

100ge sub-interface view, 100GE interface view, 10GE sub-interface view, 10GE interface view, 200GE sub-interface view, 25GE sub-interface view, 25GE interface view, 400GE sub-interface view, 400GE interface view, 40GE sub-interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE sub-interface view, GE interface view, GE electrical interface view, Global VE sub-interface view, PW-VE sub-interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mcast-base	write

Usage Guidelines

Usage Scenario

In scenarios where users have joined multicast VLANs, the replication by multicast VLAN mode enables the BRAS to replicate multicast packets based on multicast VLANs. The downstream Layer 2 device replicates multicast packets based on user VLANs. To enable this replication mode, run the multicast user-aggregation command. For users who go online through the same interface and join the same multicast program, the BRAS replicates only one copy of a multicast traffic flow to the downstream Layer 2 device, irrespective of whether the users belong to the same VLAN. The downstream Layer 2 device then replicates multicast packets based on user VLANs. This replication mode reduces the burden on the BRAS and the bandwidth consumption. This mode applies to scenarios where user packets carry VLAN tags and inter-VLAN traffic forwarding is needed.

Prerequisites

IGMP or MLD has been enabled using the igmp enable or mld enable command for the BAS interface. Otherwise, multicast replication by multicast VLAN does not take effect.

Precautions

The multicast VLAN ID is mutually exclusive with other access VLAN IDs on the same physical interface.

A VLAN ID specified in the multicast user-aggregation command must be different from any VLAN IDs specified on the same interface or sub-interface view.
If users are requiring multicast programs, the multicast user-aggregation command can be run again only after the existing configuration of the command is deleted.
If users are requiring multicast programs, the multicast user-aggregation command can be run only after the users go offline or leave the corresponding multicast groups.
A VLAN ID specified in the multicast user-aggregation command must be different from any user VLAN ID specified in the user-vlan command.

In VS mode, this command is supported only by the admin VS.

Example

# Enable multicast replication by multicast VLAN on GE 0/1/0, with the VLAN ID being set to 2.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] multicast user-aggregation vlan 2