mld static-group(mld)

Function

The mld static-group command adds a sub-interface to an IPv6 multicast group statically.

The undo mld static-group command deletes the IPv6 multicast group to which an interface is statically added.

By default, an interface is not added to any IPv6 multicast group statically.

Format

mld static-group ipv6-group-address [ inc-step-mask ipv6-group-mask-length number group-number ] [ source ipv6-source-address ]

undo mld static-group { all | ipv6-group-address inc-step-mask ipv6-group-mask-length number group-number [ source ipv6-source-address ] }

undo mld static-group ipv6-group-address [ source ipv6-source-address ]

Parameters

Parameter	Description	Value
ipv6-group-address	Specifies the IP address of the IPv6 multicast group to which an interface is statically added. In batch configuration mode, this parameter specifies the initial address of the multicast group range.	The value is in the hexadecimal notation and in the format of FFxA:xxxx:xxxx::xxxx, among which x ranges from 0 to F and A ranges from 3 to F or can be 0.
inc-step-mask ipv6-group-mask-length	Specifies the incremental mask step in batch configuration mode.	The value is an integer ranging from 9 to 128.
number group-number	Specifies the number of IPv6 group addresses in batch configuration mode.	The value is an integer ranging from 2 to 512.
source ipv6-source-address	Specifies the IPv6 address of a multicast source. source-address specifies a multicast source address.	The address is in hexadecimal notation.
all	Indicates that the interface is statically added to all IPv6 multicast groups.	-

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, Loopback interface view, PW-VE sub-interface view, VE sub-interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
igmp	write

Usage Guidelines

Usage Scenario

If user hosts want to receive IPv6 multicast data for a Multicast Listener Discovery (MLD) group stably for a long time or to ensure that MLD group memberships on the user network segment are stable, run the mld static-group command to add the interface connected to user hosts to MLD groups statically. In this manner, the interface can fast respond to users' requests, thereby reducing the channel switch time.

If user hosts want to receive IPv6 multicast data for an MLD group from a specific multicast source for a long time, set the source SourceAddr parameter in the mld static-group command to specify the IPv6 multicast source address.

The mld static-group command is run on the interface connected to user hosts. The interface can be added to a single IPv6 multicast group or source/group, or be added to multiple IPv6 multicast groups or source/groups in batches.

Prerequisites

The multicast ipv6 routing-enable command is run in the public network instance view.

Follow-up Procedure

If user hosts no longer want to receive IPv6 multicast data for a group, manually delete the configurations of static MLD groups from the interface connected with user hosts.

Precautions

You are allowed to configure overlapped multicast group addresses in different batch configurations.

After batch static multicast groups are configured on an interface, you cannot perform the deletion operation before the system completes the batch join processing.

The command fails to be run in the VLANIF interface view in the following condition:

VLAN aggregation is enabled in the corresponding VLAN.

Example

# Add GE 0/1/0 to the multicast group FF03::101 statically.

<HUAWEI> system-view
[~HUAWEI] multicast ipv6 routing-enable
[*HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/0] mld static-group ff03::101

# Add GE 0/1/0 to multicast groups in batches, with the initial group address set to FF33::1, the source IP address set to 2001:DB8::101, the incremental mask length set to 24, and the number of group addresses set to 2.

<HUAWEI> system-view
[~HUAWEI] multicast ipv6 routing-enable
[*HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/0] mld static-group ff33::1 inc-step-mask 24 number 2 source 2001:DB8::101

# Add GE 0/1/0 to multicast groups in batches, with the initial group address set to FF25::1, the incremental mask length set to 24, and the number of group addresses set to 2.

<HUAWEI> system-view
[~HUAWEI] multicast ipv6 routing-enable
[*HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/0] mld static-group ff25::1 inc-step-mask 24 number 2

# Configure GE 0/1/0 to forward the multicast packets sent from the multicast source 2001:DB8::101 to the multicast group FF04::202.

<HUAWEI> system-view
[~HUAWEI] multicast ipv6 routing-enable
[*HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/0] mld static-group ff04::202 source 2001:DB8::101