display mld interface

Function

The display mld interface command displays MLD information on an interface.

Format

display mld interface [ interface-type interface-number | up | down ] [ verbose ]

Parameters

Parameter	Description	Value
interface-type interface-number	Displays MLD information on a specified interface. If this parameter is not specified, the command displays MLD information on all interfaces.	-
up	Indicates that the status of the IPv6 protocol on the MLD interface is Up, that is, MLD is in Active state.	-
down	Indicates that the status of the IPv6 protocol on the MLD interface is Down, that is, MLD is in Inactive state.	-
verbose	Displays detailed information about MLD interfaces.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

To check the MLD configuration and running status on an interface, run the display mld interface command. This command displays MLD information only when MLD-enabled interfaces exist on the device.

Example

# Display the MLD configuration and running status on VLANIF100.

<HUAWEI> display mld interface vlanif 100 verbose
Interface information
 Vlanif100(FE80::2E0:B4FF:FE35:FF01):
   MLD is enabled
   Current MLD version is 2
   MLD state: up
   MLD group policy: none
   MLD limit: -  
   Value of query interval for MLD (negotiated): 125 s
   Value of query interval for MLD (configured): 125 s
   Value of other querier timeout for MLD: 0 s
   Value of maximum query response time for MLD: 10 s
   Value of last listener query time: 2 s
   Value of last listener query interval: 1 s
   Value of startup query interval: 31 s
   Value of startup query count: 2
   General query timer expiry (hours:minutes:seconds): 00:00:28
   Querier for MLD: FE80::2E0:B4FF:FE35:FF01 (this router)
   MLD activity: 2 joins, 0 dones
   Robustness (negotiated): 2
   Robustness (configured): 2
   Require-router-alert: disabled
   Send-router-alert: enabled
   Ip-source-policy: disabled
   Query Ip-source-policy: disabled
   Prompt-leave: disabled
   SSM-Mapping: enabled
   Startup-query-timer-expiry: off
   Other-querier-present-timer-expiry: off
    TTL-check: disabled
  Total 2 MLD Groups reported

Choose Columns...

**Table 1** Description of the **display mld interface** command output
Item	Description
Vlanif100(FE80::2E0:B4FF:FE35:FF01)	Interface type and interface number (IPv6 link-local address).
MLD is enabled	MLD is enabled. To enable MLD, run the mld enable command.
Current MLD version is 2	MLD version is set to 2 on the interface. To set the MLD version, run the mld version command.
MLD state	Status of the MLD interface, that is, up or down.
MLD group policy	ACL6 number of the MLD group policy. To set ACL6 number of the MLD group policy, run the mld group-policy command.
MLD limit	Maximum number of MLD group members that the current interface can maintain. To set the maximum number of MLD group members that the current interface can maintain, run the mld limit command.
Value of query interval for MLD (negotiated)	Actual interval for sending MLD Query messages after negotiation, in seconds.
Value of query interval for MLD (configured)	Configured interval for sending MLD Query messages, in seconds. To set the interval for sending MLD Query messages, run the mld timer query command.
Value of other querier timeout for MLD	Timeout period of other MLD queriers, in seconds. To set the timeout period of an MLD querier, run the mld timer other-querier-present command.
Value of maximum query response time for MLD	Maximum response time for MLD Query messages, in seconds. To set the maximum response time for MLD Query messages, run the mld max-response-time command.
Value of last listener query time	Last listener query time, in seconds. The last listener query time is calculated by multiplying the interval for sending Multicast Address Specific Query messages or Multicast Address and Source Specific Query messages by the robustness variable.
Value of last listener query interval	Interval for sending Multicast Address Specific Query messages or Multicast Address and Source Specific Query messages (Last listener query), in seconds. To set the interval for sending Last listener query, run the mld lastlistener-queryinterval command.
Value of startup query interval	Interval for sending Query messages when a querier starts, in seconds. The interval is 1/4 the query interval configured using the mld timer query command.
Value of startup query count	Number of times the querier sends Query messages when a querier starts. To set the number of times for sending Query messages when the querier starts, run the mld robust-count command.
General query timer expiry (hours:minutes:seconds)	Timeout period of the general query timer.
Querier for MLD	Link-local address of the MLD querier.
MLD activity	Statistics about MLD activities (join or leave).
Robustness (negotiated)	Robustness variable after negotiation by the non-querier device.
Robustness (configured)	Robustness variable set on the interface. To set the robustness variable on an interface, run the mld robust-count command.
Require-router-alert	Whether the switch discards MOD packets that do not contain the Router-Alert option in IP packet headers. enable: The switch discards MLD packets that do not contain the Router-Alert option in IP packet headers. disable: The switch does not discard MLD packets that do not contain the Router-Alert option in IP packet headers. This function is configured using the mld require-router-alert command.
Send-router-alert	Whether the sent MLD packet carries the Router-Alert option. To configure whether the sent MLD packet carries the Router-Alert option, run the mld send-router-alert command.
Ip-source-policy	Whether to filter Multicast Listener Report/Done messages based on host addresses. enabled: The switch filters MLD Report/Leave messages based on host addresses. disabled The switch does not filter MLD Report/Leave messages based on host addresses. This function is configured using the mld ip-source-policy command.
Query Ip-source-policy	Whether to filter MLD Query messages based on host addresses. To configure whether to filter MLD Query messages based on host addresses, run the mld query ip-source-policy command.
Prompt-leave	Whether fast leave is enabled. enabled: Fast leave is enabled. disabled: Fast leave is disabled. This function is configured using the mld prompt-leave command.
SSM-Mapping	Whether SSM mapping is enabled. enabled: SSM mapping is enabled. disabled: SSM mapping is disabled. This function is configured using the mld ssm-mapping enable command.
Startup-query-timer-expiry	Status of the timer for the interface functioning as the querier after startup to send Query messages. off: The interface sends Query messages immediately after startup. on: The interface delays sending Query messages after startup.
Other-querier-present-timer-expiry	Status of the timer identifying whether another querier is present. off: The interface considers itself a querier and no other queriers exist. on: The interface no longer considers itself a querier and another querier exists.
TTL-check	Whether the function to check the TTL values in received MLD Report, Leave, and Query messages is enabled: enabled disabled
Total 2 MLD Groups reported	Two Multicast Listener Report messages are received on the interface.