display mld group

Use display mld group to display information about MLD multicast groups (IPv6 multicast groups that hosts have joined through MLD).

Syntax

display mld [ vpn-instance vpn-instance-name ] group [ ipv6-group-address | interface interface-type interface-number ] [ static | verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays information about MLD multicast groups on the public network.

ipv6-group-address: Specifies an IPv6 multicast group address. The value range for this argument is FFxy::/16 (excluding FFx1::/16 and FFx2::/16), where "x" and "y" represent any hexadecimal numbers in the range of 0 to F. If you do not specify an IPv6 multicast group, this command displays information about all MLD multicast groups.

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays information about MLD multicast groups for all interfaces.

static: Specifies MLD multicast groups that hosts have joined statically. If you do not specify this keyword, the command displays information about MLD multicast groups that hosts have joined dynamically.

verbose: Displays detailed information about MLD multicast groups.

Examples

# Display information about MLD multicast groups that hosts have dynamically joined on the public network.

<Sysname> display mld group
MLD groups in total: 1
 Vlan-interface1(FE80::101):
  MLD groups reported in total: 1
   Group address: FF03::101
    Last reporter: FE80::10
    Uptime: 00:02:04
    Expires: 00:01:15

Table 110: Command output

Field	Description
MLD groups in total	Total number of MLD multicast groups.
MLD groups reported in total	Total number of MLD multicast groups that the hosts attached to the interface have joined dynamically.
Group address	IPv6 multicast group address.
Last reporter	IPv6 address of the receiver host that last reported membership for the group.
Uptime	Length of time since the IPv6 multicast group was joined.
Expires	Remaining lifetime for the IPv6 multicast group. This field displays Off if the timer is disabled.

# Display detailed information about MLD multicast group FF3E::101 that hosts have statically joined on the public network. In this example, the switch is configured with MLDv2.

<Sysname> display mld group ff3e::101 verbose
 Vlan-interface1(FE80::101):
  MLD groups reported in total: 1
   Group: FF3E::101
     Uptime: 00:01:46
     Exclude expires: 00:04:16
     Mapping expires: 00:02:16
     Last reporter: FE80::10
     Last-listener-query-counter: 0
     Last-listener-query-timer-expiry: Off
     Mapping last-listener-query-counter: 0
     Mapping last-listener-query-timer-expiry: Off
     Group mode: Exclude
     Version1-host-present-timer-expiry: Off
     Source list (sources in total: 1):
       Source: 10::10
          Uptime: 00:00:09
          V2 expires: 00:04:11
          Mapping expires: 00:02:16
          Last-listener-query-counter: 0
          Last-listener-query-timer-expiry: Off

Table 111: Command output

Field	Description
MLD groups reported in total	Total number of MLD multicast groups that the hosts attached to the interface have joined dynamically.
Group	IPv6 multicast group address.
Uptime	Length of time since the IPv6 multicast group was reported.
Exclude expires	Remaining time for the IPv6 multicast group in Exclude mode. This field displays Off if the timer is disabled.
Mapping expires	Remaining time for the IPv6 multicast group specified in MLD SSM mappings. This field is displayed only when the device is configured with MLD SSM mappings.
Last reporter	IPv6 address of the receiver host that last reported membership for this group.
Last-listener-query-counter	Number of MLD multicast-address-specific queries or MLD multicast-address-and-source-specific queries sent for the group.
Last-listener-query-timer-expiry	Remaining time for the MLD last listener query timer for the multicast group. This field displays Off if the timer is disabled.
Mapping last-listener-query-counter	Number of MLD multicast-address-specific queries or MLD multicast-address-and-source-specific queries sent for the IPv6 multicast group specified in MLD SSM mappings. This field is displayed only when the device is configured with MLD SSM mappings.
Mapping last-listener-query-timer-expiry	Remaining time for the last listener query timer of the IPv6 multicast group specified in MLD SSM mappings. This field displays Off if the timer is disabled. This field is displayed only when the device is configured with MLD SSM mappings.
Group mode	IPv6 multicast source filtering mode: Include—Include mode. Exclude—Exclude mode. For a device that runs MLDv1: If MLD SSM mappings are not configured, this field displays Exclude. If MLD SSM mappings are configured, this field displays Include or Exclude depending on the SSM mappings and the IPv6 multicast groups that the host joins.
Version1-host-present-timer-expiry	Remaining time for the MLDv1 host present timer. This field displays Off if the timer is disabled. This field is displayed only when the device runs MLDv2.
Source list (sources in total 1)	List of IPv6 multicast sources and total number of IPv6 multicast sources. This field is displayed only when the device runs MLDv2 or is configured with MLD SSM mappings.
Source	IPv6 multicast source address. This field is displayed only when the device runs MLDv2 or the device is configured with MLD SSM mappings.
Uptime	Length of time since the IPv6 multicast source was reported. This field is displayed only when the device runs MLDv2 or is configured with MLD SSM mappings.
V2 expires	Remaining time for the IPv6 multicast source when the device runs MLDv2. This field displays Off if the timer is disabled. This field displays three hyphens (---) if the IPv6 multicast source is specified in MLD SSM mappings. This field is displayed only when the device runs MLDv2 or is configured with MLD SSM mappings.
Mapping expires	Remaining time for the IPv6 multicast sources specified in MLD SSM mappings.
Last-listener-query-counter	Number of MLD multicast-address-specific queries or MLD multicast-address-and-source-specific queries sent for the IPv6 multicast source and group. This field is displayed only when the device runs MLDv2 or is configured with MLD SSM mappings.
Last-listener-query-timer-expiry	Remaining time for the last listener query timer for the IPv6 multicast source and group. This field displays Off if the timer is disabled. This field is displayed only when the device runs MLDv2 or is configured with MLD SSM mappings.

# Display information about the MLD multicast groups that hosts have statically joined on the public network.

<Sysname> display mld group static
 Entries in total: 2
  (*, FF03::101)
   Interface: Vlan1
   Expires: Never

  (2001::101, FF3E::202)
   Interface: Vlan1
   Expires: Never

Table 112: Command output

Field	Description
Entries in total	Total number of the IPv6 multicast groups that hosts have joined statically.
(*, FF03::101)	(*, G) entry.
(2001::101, FF3E::202)	(S, G) entry.
Expires	Remaining lifetime for the IPv6 multicast group. This field always displays Never, which means that the IPv6 multicast group never expires.

Related commands

reset mld group

prev	up	next
MLD commands	home	display mld interface