reset mld group

Function

The reset mld group command clears the records about Multicast Listener Discovery (MLD) groups that an interface dynamically joins.

The reset mld group ssm-mapping command deletes the multicast groups configured with Source-Specific Multicast (SSM) mapping.

Format

reset mld group { all | interface { port-type port-num | port-name } { all | GrpAddr6 [ GrpMaskLen ] [ SrcAddr6 [ SrcMaskLen ] ] } }

reset mld group ssm-mapping { all | interface { port-type port-num | port-name } { all | GrpAddr6 [ GrpMaskLen ] } }

reset mld { vpn-instance vpn-instance-name | all-instance } group { all | interface { port-type port-num | port-name } { all | GrpAddr6 [ GrpMaskLen ] [ SrcAddr6 [ SrcMaskLen ] ] } }

reset mld { vpn-instance vpn-instance-name | all-instance } group ssm-mapping { all | interface { port-type port-num | port-name } { all | GrpAddr6 [ GrpMaskLen ] } }

Parameters

Parameter	Description	Value
all	Deletes multicast groups configured with SSM mapping on each interface.	-
interface port-type port-num	Specifies the type and number of an interface.	-
port-name	Specifies the name of an interface.	-
GrpAddr6	Specifies a multicast group address.	The address ranges from FF00:: to FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF, in hexadecimal format.
GrpMaskLen	Specifies the mask length of the multicast group address.	The value is an integer ranging from 8 to 128.
SrcAddr6	Specifies a multicast source address.	The address ranges from FF00:: to FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF, in hexadecimal format.
SrcMaskLen	Specifies the mask length of the multicast source address.	The value is an integer ranging from 8 to 128.
vpn-instance vpn-instance-name	Specifies the name of a VPN instance.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported. In addition, the VPN instance name must not be _public_. When double quotation marks are used around the string, spaces are allowed in the string.
all-instance	Specifies all VPN instance.	-

Views

User view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
igmp	execute

Usage Guidelines

Usage Scenario

This command is used to clear records about all MLD groups that an interface dynamically joins, including common multicast groups and the multicast groups configured with Source-Specific Multicast (SSM) mapping.

An interface can rejoin the multicast group after the records about this group are cleared.

This command is valid on the multicast groups that the interface dynamically joins only, and only the Multicast Listener Discovery version 1 (MLDv1) multicast groups within the range of SSM group addresses are deleted.

The SSM mapping policy can be re-configured after being deleted.

Example

# Clear records about the groups from FF03::101:0 to FF03::101:FFFF that GE 0/1/0 dynamically joins.

<HUAWEI> reset mld group interface GigabitEthernet 0/1/0 ff03::101:0 112

# Clear the records about the group FF03::101:0 that GE 0/1/0 dynamically joins.

<HUAWEI> reset mld group interface GigabitEthernet 0/1/0 ff03::101:0

# Clear the records about the groups that GE 0/1/0 dynamically join.

<HUAWEI> reset mld group interface GigabitEthernet 0/1/0 all

# Clear the records about the groups that all the interfaces dynamically join.

<HUAWEI> reset mld group all

# Delete the SSM mapping policy with groups within the range of FF03::101:0 to FF03::101:FFFF on GE 0/1/0.

<HUAWEI> reset mld group ssm-mapping interface GigabitEthernet 0/1/0 ff03::101:0 112