display mld group

Function

The display mld group command displays information about MLD groups that hosts have dynamically joined by sending Report messages.

Format

display mld group [ ipv6-group-address | interface interface-type interface-number ]^* [ verbose ]

display mld group [ interface interface-type interface-number ] entry-number

Parameters

Parameter	Description	Value
ipv6-group-address	Specifies an IPv6 multicast group address.	The value is a 32-digit hexadecimal number in X:X:X:X:X:X:X:X format. The value ranges from FF00:: to FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF.
interface interface-type interface-number	Specifies the type and number of an interface. If this parameter is not specified, the command displays MLD group membership information on all interfaces.	-
verbose	Displays detailed information about a multicast group. If this parameter is not specified, the command displays only the summary of the MLD group.	-
entry-number	Displays statistics about MLD multicast groups that hosts dynamically join.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can use this command to check information about multicast groups that have established memberships.

Example

# Display detailed information about all multicast groups that the interface dynamically joins.

<HUAWEI> display mld group verbose
Total entry on this router: 1
Interface group report information of VPN-Instance: public net
 Limited entry of this VPN-Instance: -
 Vlanif100(FE80::2E0:49FF:FE29:1103):
  Total entry on this interface: 1
  Limited entry on this interface: - 
  Total 1 MLD Group reported
   Group: FF05::2
     Uptime: 00:01:07
     Expires: 00:03:45
     Last reporter: FE80::215:E9FF:FEAC:7666
     Last-listener-query-counter: 0
     Last-listener-query-timer-expiry: off
     Group mode: exclude 
     Version1-host-present-timer-expiry: 00:03:45

# Display statistics about MLD multicast groups that hosts dynamically join.

<HUAWEI> display mld group entry-number
Interface group report information of VPN-Instance: public net
  Total 100 MLD Groups reported
 Vlanif100(FE80:2300::4):
  Total 100 MLD Groups reported

**Table 1** Description of the **display mld group** command output
Item	Description
Interface group report information of VPN-Instance	VPN instance to which MLD groups on an interface belong. public net indicates the public network instance.
Total entry on this router	Total number of dynamic MLD multicast groups on the switch.
Limited entry of this VPN-Instance	Maximum number of MLD entries that can be created for this instance.
Vlanif100(FE80::2E0:49FF:FE29:1103)	Interface type and interface number (IPv6 link-local address).
Total entry on this interface	Total number of dynamic MLD multicast groups on the interface.
Limited entry on this interface	Maximum number of MLD entries that the current interface can create.
Total 1 MLD Group reported	One MLD Report message is received on the interface.
Group	IPv6 address of an IPv6 multicast group.
Uptime	Time since a multicast group is discovered. The time format is as follows: If the time is shorter than or equal to 24 hours, the format is hours:minutes:seconds. If the time is longer than 24 hours but shorter than or equal to one week, the format is days:hours. If the time is longer than one week, the format is weeks:days.
Expires	Time left before a group will be deleted from the MLD group table. The time format is as follows: If the time is shorter than or equal to 24 hours, the format is hours:minutes:seconds. If the time is longer than 24 hours but shorter than or equal to one week, the format is days:hours. If the time is longer than one week, the format is weeks:days. "off" indicates that the group will never be aged out.
Last reporter	Link-local address of the last host that sends a Multicast Listener Report message.
Last-listener-query-counter	Number of Multicast Address and Source Specific Query messages sent by the querier. After the querier receives an MLD done message sent from a host leaving a group, it sends the specified number of Multicast Address and Source Specific Query messages to check whether this group has other members on the network segment. The Last-listener-query-counter value reduces by 1 every time the querier sends a Multicast Address and Source Specific Query message. The number of times is configured using the mld robust-count command.
Last-listener-query-timer-expiry	The timeout time of the Multicast Address and Source Specific Query timer. The timer starts when the querier receives an MLD done message sent from a host leaving a group. The timer value is configured using the mld lastlistener-queryinterval command.
Group mode	Filter mode of multicast groups, that is, exclude or include.
Version1-host-present-timer-expiry	Timeout time of MLDv1 hosts. The timer value is calculated using the following formula: Timer value = General query interval x Robustness variable + Maximum response time for Query messages. The three parameters used in the formula are configured using the mld timer query, mld robust-count, and mld max-response-time commands respectively.