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 1 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 2 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 3 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

display mld interface

Use display mld interface to display MLD information for interfaces.

Syntax

display mld [ vpn-instance vpn-instance-name ] interface [ interface-type interface-number ] [ proxy ] [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-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 MLD information for interfaces on the public network.

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

proxy: Displays the MLD proxy interface information. If you do not specify this keyword, the command displays MLD information for all interfaces.

verbose: Displays detailed MLD information.

Examples

# Display detailed MLD information for VLAN-interface 1 (non-proxy interface) on the public network.

<Sysname> display mld interface vlan-interface 1 verbose

Vlan-interface1(FE80::200:AFF:FE01:101):

MLD is enabled.

MLD version: 1

Query interval for MLD: 125s

Other querier present time for MLD: 255s

Maximum query response time for MLD: 10s

Last listener query interval: 1s

Last listener query count: 2

Startup query interval: 31s

Startup query count: 2

General query timer expiry (hh:mm:ss): 00:00:23

Querier for MLD: FE80::200:AFF:FE01:101 (This router)

MLD activity: 1 join(s), 0 done(s)

IPv6 multicast routing on this interface: Enabled

Robustness: 2

Require-router-alert: Disabled

Fast-leave: Disabled

Startup-query: Off

Other-querier-present-timer-expiry (hh:mm:ss): Off

MLD groups reported in total: 1

# Display detailed MLD information for all MLD proxy interfaces on the public network.

<Sysname> display mld interface proxy verbose

Vlan-interface2(FE80::100:CEF:FE01:101):

MLD proxy is enabled.

MLD version: 1

IPv6 multicast routing on this interface: Enabled

Require-router-alert: Disabled

Version1-querier-present-timer-expiry (hh:mm:ss): Off

Table 4 Command output

Field	Description
Vlan-interface1(FE80::200:AFF:FE01:101)	Interface and its IPv6 link-local address.
MLD is enabled	MLD is enabled on the interface.
MLD version	Version of MLD that the interface runs.
Query interval for MLD	MLD query interval, in seconds.
Other querier present time for MLD	MLD other querier present interval, in seconds.
Maximum query response time for MLD	Maximum response time for MLD general query messages, in seconds.
Last listener query interval	Interval for sending MLD multicast-address-specific queries or MLD multicast-address-and-source-specific queries, in seconds.
Last listener query count	Number of MLD multicast-address-specific queries or MLD multicast-address-and-source-specific queries sent for the group.
Startup query interval	MLD startup query interval, in seconds.
Startup query count	Number of MLD general queries sent on startup.
General query timer expiry	Remaining time for the MLD general query timer. This field displays Off if the timer is disabled.
Querier for MLD	IPv6 link-local address of the MLD querier.
MLD activity: 1 join(s), 0 done(s)	MLD activity statistics: · join(s)—Total number of IPv6 multicast groups that the interface has joined. · done(s)—Total number of IPv6 multicast groups that the interface has left.
IPv6 multicast routing on this interface	Whether IPv6 multicast routing is enabled: Enabled or Disabled.
Robustness	Robustness variable of the MLD querier.
Require-router-alert	Whether the feature of dropping MLD messages without Router-Alert is enabled: Enabled or Disabled.
Fast-leave	Whether fast-leave processing is enabled: Enabled or Disabled.
Startup-query	Whether the MLD querier sends MLD general queries at the startup query interval on startup: · On—The MLD querier performs the above action. · Off—The MLD querier does not perform the above action.
Other-querier-present-timer-expiry	Remaining time for MLD other querier present timer. This field displays Off if the timer is disabled.
MLD groups reported in total	Total number of IPv6 multicast groups that the interface has joined dynamically. This field is not displayed if the interface does not join IPv6 multicast groups.
MLD proxy is enabled	MLD proxying is enabled.
Version1-querier-present-timer-expiry	Remaining time for the MLDv1 querier present timer. This field displays Off if the timer is disabled.

display mld proxy group

Use display mld proxy group to display information about IPv6 multicast groups maintained by the MLD proxy.

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN 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 IPv6 multicast groups maintained by the MLD proxy on the public network.

ipv6-group-address: Specifies an IPv6 multicast group by its IPv6 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 IPv6 multicast group membership entries for all IPv6 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 IPv6 multicast groups maintained by the MLD proxy for all interfaces.

verbose: Displays detailed information.

Examples

# Display information about IPv6 multicast groups maintained by the MLD proxy on the public network.

<Sysname> display mld proxy group

MLD proxy group records in total: 2

Vlan-interface1(FE80::16:1):

MLD proxy group records in total: 2

Group address: FF1E::1

Member state: Idle

Expires: Off

Group address: FF1E::2

Member state: Idle

Expires: Off

# Display detailed information about IPv6 multicast group FF1E::1 maintained by the MLD proxy on the public network.

<Sysname> display mld proxy group ff1e::1 verbose

Vlan-interface1(FE80::16:1):

MLD proxy group records in total: 2

Group: FF1E::1

Group mode: Include

Member state: Idle

Expires: Off

Source list (sources in total: 1):

100::1

Table 5 Command output

Field	Description
MLD proxy group records in total	Total number of IPv6 multicast group membership entries maintained by the MLD proxy.
Vlan-interface1(FE80::16:1)	Interface and its IPv6 address.
Pending proxy group	Pending IPv6 multicast group membership entries maintained by the MLD proxy.
Group address/Group	IPv6 multicast group address.
Member state	Member host states: · Delay—The member host has joined a group and started a delay timer. · Idle—The member host has joined a group, but didn't start a delay timer.
Expires	Remaining delay time for a member host to send a responding report. This field displays Off if the timer is disabled.
Group mode	IPv6 multicast source filtering mode: · Include. · Exclude.
Source list (sources in total: 1)	List of IPv6 multicast sources in the group membership database maintained by the MLD proxy, and the total number of the IPv6 multicast sources.

display mld proxy routing-table

Use display mld proxy routing-table to display IPv6 multicast routing entries maintained by the MLD proxy.

Syntax

display mld [ vpn-instance vpn-instance-name ] proxy routing-table [ ipv6-source-address [ prefix-length ] | ipv6-group-address [ prefix-length ] ] * [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays IPv6 multicast routing entries maintained by the MLD proxy on the public network.

ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you do not specify an IPv6 multicast source, this command displays IPv6 multicast routing entries maintained by the MLD proxy for all IPv6 multicast sources.

ipv6-group-address: Specifies an IPv6 multicast group by its IPv6 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 IPv6 multicast routing entries for all IPv6 multicast groups maintained by the MLD proxy.

prefix-length: Specifies an address prefix length. For an IPv6 multicast source address, the value range for this argument is 0 to 128. For an IPv6 multicast group address, the value range for this argument is 8 to 128. The default value is 128.

verbose: Displays detailed information about IPv6 multicast routing entries maintained by the MLD proxy.

Examples

# Display IPv6 multicast routing entries maintained by the MLD proxy on the public network.

<Sysname> display mld proxy routing-table

Total 1 (*, G) entries, 2 (S, G) entries.

(100::1, FF1E::1)

Upstream interface: Vlan-interface1

Downstream interfaces (1 in total):

1: Vlan-interface2

Protocol: MLD

(*, FF1E::2)

Upstream interface: Vlan-interface1

Downstream interfaces (1 in total):

1: Vlan-interface2

Protocol: STATIC

(2::2, FF1E::2)

Upstream interface: Vlan-interface1

Downstream interfaces (2 in total):

1: LoopBack1

Protocol: STATIC

2: Vlan-interface2

Protocol: PROXY

# Display detailed information about IPv6 multicast routing entries maintained by the MLD proxy on the public network.

<Sysname> display mld proxy routing-table verbose

Total 1 (*, G) entries, 2 (S, G) entries.

(100::1, FF1E::1)

Upstream interface: Vlan-interface1

Downstream interfaces (1 in total):

1: Vlan-interface2

Protocol: MLD

Querier state: Querier

Join/Prune state:Join

Non-downstream interfaces: None

(*, FF1E::2)

Upstream interface: Vlan-interface1

Downstream interfaces (1 in total):

1: Vlan-interface2

Protocol: STATIC

Querier state: Querier

Join/Prune state:Join

Non-downstream interfaces (1 in total):

1: Vlan-interface3

Protocol: MLD

Querier state: Non-querier

Join/Prune state:Join

(2::2, FF1E::2)

Upstream interface: Vlan-interface1

Downstream interfaces (2 in total):

1: LoopBack1

Protocol: STATIC

Querier state: Querier

Join/Prune state: Join

2: Vlan-interface2

Protocol: PROXY

Querier state: Querier

Join/Prune state: Join

Non-downstream interfaces: None

Table 6 Command output

Field	Description
Total 1 (*, G) entries, 2 (S, G) entries	Total number of (*, G ), and the total number of (S, G) entries.
(100::1, FF1E::1)	(S, G) entry.
Upstream interface	Incoming interface of a forwarding entry.
Downstream interfaces (1 in total)	Outgoing interfaces, and the total number of outgoing interfaces.
Non-downstream interfaces (1 in total)	Non-outgoing interfaces, and the total number of non-outgoing interfaces.
1: Vlan-interface2	Index of an outgoing interface and the outgoing interface.
Protocol	Protocol type: · MLD—Dynamic MLD. · PROXY—MLD proxy. · STATIC—Static MLD.
Querier state	Querier state: · Querier. · Non-querier.
Join/Prune state	Joined or pruned state of the interface: · NI—Default state. · Join—Joined state. · Prune—Pruned state.

display mld ssm-mapping

Use display mld ssm-mapping to display MLD SSM mappings.

Syntax

display mld [ vpn-instance vpn-instance-name ] ssm-mapping ipv6-group-address

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

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

Examples

# Display MLD SSM mappings for IPv6 multicast group FF3E::101 on the public network.

<Sysname> display mld ssm-mapping ff3e::101

Group: FF3E::101

Source list:

1::1

1::2

10::1

100::10

Table 7 Command output

Field	Description
Group	IPv6 multicast group address.
Source list	List of IPv6 multicast source addresses.

dscp

Use dscp to set the DSCP value for outgoing MLD protocol packets.

Use undo dscp to restore the default.

Syntax

dscp dscp-value

undo dscp

Default

The DSCP value is 48 for outgoing MLD protocol packets.

Views

MLD view

Predefined user roles

network-admin

Parameters

dscp-value: Specifies a DSCP value in the range of 0 to 63.

Usage guidelines

The DSCP value is carried in the Traffic Class field of an IPv6 packet to determine the transmission priority of the packet. A greater DSCP value represents a higher priority.

Examples

# Set the DSCP value to 63 for outgoing MLD protocol packets.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] dscp 63

last-listener-query-count (MLD view)

Use last-listener-query-count to set the MLD last listener query count globally.

Use undo last-listener-query-count to restore the default.

Syntax

mld last-member-query-count count

undo mld last-member-query-count

Default

The MLD last listener query count equals the MLD querier's robustness variable.

Views

MLD view

Predefined user roles

network-admin

Parameters

Usage guidelines

You can set the MLD last listener query count globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD last listener query count to 6 on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] last-listener-query-count 6

Related commands

mld last-listener-query-count

last-listener-query-interval (MLD view)

Use last-listener-query-interval to set the MLD last listener query interval globally.

Use undo last-listener-query-interval to restore the default.

Syntax

last-listener-query-interval interval

undo last-listener-query-interval

Default

The MLD last listener query interval is 1 second.

Views

MLD view

Predefined user roles

network-admin

Parameters

interval: Specifies an MLD last listener query interval in the range of 1 to 25 seconds.

Usage guidelines

You can set the MLD last listener query interval globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD last listener query interval to 6 seconds on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] last-listener-query-interval 6

Related commands

mld last-listener-query-interval

max-response-time (MLD view)

Use max-response-time to set the maximum response time for MLD general queries globally.

Use undo max-response-time to restore the default.

Syntax

max-response-time time

undo max-response-time

Default

The maximum response time for MLD general queries is 10 seconds.

Views

MLD view

Predefined user roles

network-admin

Parameters

time: Specifies the maximum response time for MLD general queries in the range of 1 to 3174 seconds.

Usage guidelines

You can set the maximum response time globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global maximum response time for MLD general queries to 25 seconds on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] max-response-time 25

Related commands

mld max-response-time

mld

Use mld to enter MLD view.

Use undo mld to delete the configurations in MLD view.

Syntax

mld [ vpn-instance vpn-instance-name ]

undo mld [ vpn-instance vpn-instance-name ]

Views

System view

Predefined user roles

network-admin

Parameters

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

Examples

# Enter MLD view of the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld]

# Enter MLD view of VPN instance mvpn.

<Sysname> system-view

[Sysname] mld vpn-instance mvpn

[Sysname-mld-mvpn]

mld access-policy

Use mld access-policy to configure an MLD user access policy.

Use undo mld access-policy to delete an MLD user access policy.

Syntax

mld access-policy ipv6-acl-number

undo mld access-policy ipv6-acl-number

Default

No MLD user access policies exist. MLD users are not authorized to join any IPv6 multicast groups.

Views

User profile view

Predefined user roles

network-admin

Parameters

ipv6-acl-number: Specifies an IPv6 basic or advanced ACL number, in the range of 2000 to 3999. MLD users can join only IPv6 multicast groups that the ACL permits. If the ACL does not exist or does not have valid rules, MLD users cannot join IPv6 multicast groups.

Usage guidelines

You can configure multiple MLD user access policies by using this command multiple times. An MLD report is permitted if it matches one of the access policies.

When you configure a rule in the IPv6 ACL, follow these restrictions and guidelines:

· An IPv6 ACL rule containing the vpn-instance vpn-instance option does not take effect.

· In a basic ACL, the source source-address source-prefix option specifies an IPv6 multicast source address.

· In an advanced ACL, the source source-address source-prefix option specifies an IPv6 multicast source address. The destination dest-address dest-prefix option specifies an IPv6 multicast group address.

Set the source source-address source-prefix option to 0::0 to match the following MLD reports:

¡ MLDv1 reports.

¡ MLDv2 IS_EX and MLDv2 TO_EX reports that do not carry multicast source addresses.

· Among the other optional parameters, only the fragment keyword and the time-range time-range-name option take effect.

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Configure an MLD user access policy in user profile abc to authorize MLD users to join IPv6 multicast group FF03::101.

<Sysname> system-view

[Sysname] acl ipv6 basic 2000

[Sysname-acl-ipv6-basic-2000] rule permit source ff03::101 128

[Sysname-acl-ipv6-basic-2000] quit

[Sysname] user-profile abc

[Sysname-user-profile-abc] mld access-policy 2000

mld enable

Use mld enable to enable MLD on an interface.

Use undo mld enable to disable MLD on an interface.

Syntax

mld enable

undo mld enable

Default

MLD is disabled on an interface.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

This command takes effect only when IPv6 multicast routing is enabled on the public network or for the VPN instance to which the interface belongs.

Other MLD configurations on the interface take effect only when MLD is enabled on the interface.

Examples

# Enable IPv6 multicast routing on the public network, and enable MLD for VLAN-interface 100.

<Sysname> system-view

[Sysname] ipv6 multicast routing

[Sysname-mrib6] quit

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld enable

Related commands

ipv6 multicast routing

mld fast-leave

Use mld fast-leave to enable fast-leave processing on an interface.

Use undo mld fast-leave to disable fast-leave processing on an interface.

Syntax

mld fast-leave [ group-policy ipv6-acl-number ]

undo mld fast-leave

Default

Fast-leave processing is disabled. The MLD querier sends MLD multicast-address-specific or multicast-address-and-source-specific queries after receiving a done message.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-acl-number: Specifies an IPv6 basic ACL by its number in the range of 2000 to 2999. If you specify an ACL, the fast-leave processing feature takes effect only on the IPv6 multicast groups that the ACL permits. The feature takes effect on all IPv6 multicast groups when one of the following conditions exists:

· You do not specify an ACL.

· The specified ACL does not exist.

· The specified ACL does not have valid rules.

Usage guidelines

The fast-leave processing feature enables an MLD querier to suppress MLD multicast-address-specific or multicast-address-and-source-specific queries upon receiving MLD done messages permitted by the ACL.

When you configure a rule in the IPv6 basic ACL, follow these restrictions and guidelines:

· An IPv6 ACL rule containing the vpn-instance vpn-instance option does not take effect.

· The source source-address source-prefix option specifies an IPv6 multicast group address.

· Among the other optional parameters, only the fragment keyword and the time-range time-range-name option take effect.

Examples

# Enable fast-leave processing on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld fast-leave

mld group-policy

Use mld group-policy to configure an IPv6 multicast group policy on an interface to control the IPv6 multicast groups that hosts attached to the interface can join.

Use undo mld group-policy to delete the IPv6 multicast group policy on an interface.

Syntax

mld group-policy { ipv6-acl-number | name ipv6-acl-name } [ version-number ]

undo mld group-policy

Default

No IPv6 multicast group policy exists. Hosts attached to the interface can join any IPv6 multicast groups.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-acl-number: Specifies an IPv6 basic or advanced ACL by its number in the range of 2000 to 3999. Receiver hosts can join only the IPv6 multicast groups that the ACL permits. If the ACL does not exist or have valid rules, receiver hosts cannot join IPv6 multicast groups.

name ipv6-acl-name: Specifies an IPv6 basic or advanced ACL by its name, a case-insensitive string of 1 to 63 characters. The ACL name must begin with letters and it cannot be all. Hosts can join only the multicast groups that the ACL permits. If the ACL with the specified name does not exist or does not have valid rules, hosts cannot join any IPv6 multicast groups.

version-number: Specifies an MLD version number, 1 or 2. By default, this command takes effect on both MLDv1 reports and MLDv2 reports.

Usage guidelines

An IPv6 multicast group policy filters MLD reports to control the IPv6 multicast groups that hosts can join.

This command does not take effect on static member interfaces because static member interfaces do not send MLD reports.

When you configure a rule in the IPv6 ACL, follow these restrictions and guidelines:

· An IPv6 ACL rule containing the vpn-instance vpn-instance option does not take effect.

· In a basic ACL, the source source-address source-prefix option specifies an IPv6 multicast group address.

Set the source source-address source-prefix option to 0::0 to match the following MLD reports:

¡ MLDv1 reports.

¡ MLDv2 IS_EX and MLDv2 TO_EX reports that do not carry multicast source addresses.

· Among the other optional parameters, only the fragment keyword and the time-range time-range-name option take effect.

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Configure an IPv6 multicast group policy on VLAN-interface 100 so that hosts attached to the interface can join only IPv6 multicast group FF03::101.

<Sysname> system-view

[Sysname] acl ipv6 basic 2005

[Sysname-acl-ipv6-basic-2005] rule permit source ff03::101 128

[Sysname-acl-ipv6-basic-2005] quit

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld group-policy 2005

mld last-listener-query-count

Use mld last-listener-query-count to set the MLD last member query count on an interface.

Use undo mld last-listener-query-count to restore the default.

Syntax

mld last-listener-query-count count

undo mld last-listener-query-count

Default

The MLD last listener query count equals the MLD querier's robustness variable.

Views

Interface view

Predefined user roles

network-admin

Parameters

Usage guidelines

You can set the MLD last listener query count for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the MLD last listener query count to 6 on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld last-listener-query-count 6

Related commands

last-listener-query-count (MLD view)

mld last-listener-query-interval

Use mld last-listener-query-interval to set the MLD last listener query interval on an interface.

Use undo mld last-listener-query-interval to restore the default.

Syntax

mld last-listener-query-interval interval

undo mld last-listener-query-interval

Default

The MLD last listener query interval is 1 second.

Views

Interface view

Predefined user roles

network-admin

Parameters

interval: Specifies an MLD last listener query interval in the range of 1 to 25 seconds.

Usage guidelines

You can set the MLD last listener query interval for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the MLD last listener query interval to 6 seconds on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld last-listener-query-interval 6

Related commands

last-listener-query-interval (MLD view)

mld max-response-time

Use mld max-response-time to set the maximum response time for MLD general queries on an interface.

Use undo mld max-response-time to restore the default.

Syntax

mld max-response-time time

undo mld max-response-time

Default

The maximum response time for MLD general queries is 10 seconds.

Views

Interface view

Predefined user roles

network-admin

Parameters

time: Specifies the maximum response time for MLD general queries, in the range of 1 to 3174 seconds.

Usage guidelines

You can set the maximum response time for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the maximum response time for MLD general queries to 25 seconds on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld max-response-time 25

Related commands

max-response-time (MLD view)

mld non-stop-routing

Use mld non-stop-routing to enable MLD NSR.

Use undo mld non-stop-routing to disable MLD NSR.

Syntax

mld non-stop-routing

undo mld non-stop-routing

Default

MLD NSR is disabled.

Views

System view

Predefined user roles

network-admin

Examples

# Enable MLD NSR.

<Sysname> system-view

[Sysname] mld non-stop-routing

mld other-querier-present-timeout

Use mld other-querier-present-timeout to set the MLD other querier present timer on an interface.

Use undo mld other-querier-present-timeout to restore the default.

Syntax

mld other-querier-present-timeout time

undo mld other-querier-present-timeout

Default

The MLD other querier present timer is calculated by using the following formula:

[ MLD general query interval ] × [ MLD querier's robustness variable ] + [ maximum response time for MLD general queries ] / 2.

Views

Interface view

Predefined user roles

network-admin

Parameters

time: Specifies an MLD other querier present timer in the range of 1 to 31744 seconds.

Usage guidelines

You can set the MLD other querier present timer for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the MLD other querier present timer to 125 seconds on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld other-querier-present-timeout 125

Related commands

other-querier-present-timeout (MLD view)

mld proxy enable

Use mld proxy enable to enable MLD proxying on an interface.

Use undo mld proxy enable to disable MLD proxying on an interface.

Syntax

mld proxy enable

undo mld proxy enable

Default

MLD proxying is disabled on an interface.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

This command takes effect only when IPv6 multicast routing is enabled on the public network or for the VPN instance to which the interface belongs.

Examples

# Enable IPv6 multicast routing on the public network, and enable MLD proxying on VLAN-interface 100.

<Sysname> system-view

[Sysname] ipv6 multicast routing

[Sysname-mrib6] quit

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld proxy enable

Related commands

ipv6 multicast routing

mld proxy forwarding

Use mld proxy forwarding to enable IPv6 multicast forwarding on a non-querier interface.

Use undo mld proxy forwarding to disable IPv6 multicast forwarding on a non-querier interface.

Syntax

mld proxy forwarding

undo mld proxy forwarding

Default

IPv6 multicast forwarding is disabled for a non-querier interface.

Views

Interface view

Predefined user roles

network-admin

Usage guidelines

Typically, only MLD queriers can forward IPv6 multicast traffic and non-queriers cannot. This prevents IPv6 multicast data from being repeatedly forwarded. If a router interface on the MLD proxy device failed the querier election, enable multicast forwarding capability on this interface to forward multicast data to attached receivers.

Examples

# Enable IPv6 multicast forwarding on VLAN-interface 100 (non-querier interface).

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld proxy forwarding

mld query-interval

Use mld query-interval to set the MLD general query interval on an interface.

Use undo mld query-interval to restore the default.

Syntax

mld query-interval interval

undo mld query-interval

Default

The MLD general query interval is 125 seconds.

Views

Interface view

Predefined user roles

network-admin

Parameters

interval: Specifies an MLD general interval in the range of 1 to 31744 seconds.

Usage guidelines

You can set the MLD general interval for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the MLD general query interval to 60 seconds on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld query-interval 60

Related commands

query-interval (MLD view)

mld robust-count

Use mld robust-count to set the MLD querier's robustness variable on an interface.

Use undo mld robust-count to restore the default.

Syntax

mld robust-count count

undo mld robust-count

Default

The MLD querier's robustness variable is 2.

Views

Interface view

Predefined user roles

network-admin

Parameters

Usage guidelines

The MLD querier's robustness variable defines the number of times to retransmit MLD queries if packet loss occurs. A higher robustness variable makes the MLD querier more robust, but it increases the timeout time for IPv6 multicast groups.

You can set the MLD querier's robustness variable for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the MLD querier's robustness variable to 5 on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld robust-count 5

Related commands

robust-count (MLD view)

mld startup-query-count

Use mld startup-query-count to set the MLD startup query count on an interface.

Use undo mld startup-query-count to restore the default.

Syntax

mld startup-query-count count

undo mld startup-query-count

Default

The MLD startup query count equals the MLD querier's robustness variable.

Views

Interface view

Predefined user roles

network-admin

Parameters

Usage guidelines

You can set the MLD startup query count for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the MLD startup query count to 5 on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld startup-query-count 5

Related commands

startup-query-count (MLD view)

mld startup-query-interval

Use mld startup-query-interval to set the MLD startup query interval on an interface.

Use undo mld startup-query-interval to restore the default.

Syntax

mld startup-query-interval interval

undo mld startup-query-interval

Default

The MLD startup query interval equals one quarter of the MLD general query interval.

Views

Interface view

Predefined user roles

network-admin

Parameters

interval: Specifies an MLD startup query interval in the range of 1 to 31744 seconds.

Usage guidelines

You can set the MLD startup query interval for an interface in interface view or globally for all interfaces in MLD view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the MLD startup query interval to 100 seconds on VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld startup-query-interval 100

Related commands

startup-query-interval (MLD view)

mld static-group

Use mld static-group to configure an interface as a static group member of an IPv6 multicast group.

Use undo mld static-group to restore the default.

Syntax

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

undo mld static-group { all | ipv6-group-address [ source ipv6-source-address ] }

Default

An interface is not a static member of IPv6 multicast groups.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you do not specify an IPv6 multicast source, this command configures an interface as a static group member of the multicast groups with all IPv6 multicast source addresses.

all: Specifies all IPv6 multicast groups that the interface has statically joined.

Usage guidelines

For IPv6 multicast routing entries to be created, specify an IPv6 multicast source address if the specified IPv6 multicast group address is in the SSM group range.

Examples

# Configure VLAN-interface 100 as a static group member of IPv6 multicast group FF03::101.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld static-group ff03::101

# Configure VLAN-interface 100 as a static group member of IPv6 multicast source and group (2001::101, FF3E::202).

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld static-group ff3e::202 source 2001::101

mld version

Use mld version to specify an MLD version for an interface.

Use undo mld version to restore the default.

Syntax

mld version version-number

undo mld version

Default

The MLD version is 1.

Views

Interface view

Predefined user roles

network-admin

Parameters

version-number: Specifies an MLD version, 1 or 2.

Usage guidelines

For MLD to operate correctly, specify the same MLD version for all devices on the same subnet.

Examples

# Specify MLD version 2 for VLAN-interface 100.

<Sysname> system-view

[Sysname] interface vlan-interface 100

[Sysname-Vlan-interface100] mld version 2

other-querier-present-timeout (MLD view)

Use other-querier-present-timeout to set the MLD other querier present timer globally.

Use undo other-querier-present-timeout to restore the default.

Syntax

other-querier-present-timeout time

undo other-querier-present-timeout

Default

The MLD other querier present timer is calculated by using the following formula:

[ MLD general query interval ] × [ MLD querier's robustness variable ] + [ maximum response time for MLD general queries ] / 2.

Views

MLD view

Predefined user roles

network-admin

Parameters

time: Specifies an MLD other querier present timer in the range of 1 to 31744 seconds.

Usage guidelines

You can set the MLD other querier present timer globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD other querier present timer to 125 seconds on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] other-querier-present-timeout 125

Related commands

mld other-querier-present-timeout

proxy multipath (MLD view)

Use proxy multipath to enable load splitting on the MLD proxy.

Use undo proxy multipath to disable load splitting on the MLD proxy.

Syntax

proxy multipath

undo proxy multipath

Default

The load splitting feature is disabled on the MLD proxy.

Views

MLD view

Predefined user roles

network-admin

Usage guidelines

Use this feature when the MLD proxy has multiple proxy interfaces. All proxy interfaces on the MLD proxy share IPv6 multicast traffic on a per-group basis. If you do not enable this feature, only the proxy interface with the highest IPv6 address forwards IPv6 multicast traffic.

Examples

# Enable load splitting on the MLD proxy device on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] proxy multipath

query-interval (MLD view)

Use query-interval to set the MLD general query interval globally.

Use undo query-interval to restore the default.

Syntax

query-interval interval

undo query-interval

Default

The MLD general query interval is 125 seconds.

Views

MLD view

Predefined user roles

network-admin

Parameters

interval: Specifies an MLD general query interval in the range of 1 to 31744 seconds.

Usage guidelines

You can set the MLD general query interval globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD general query interval to 60 seconds on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] query-interval 60

Related commands

mld query-interval

reset mld group

Use reset mld group to clear dynamic MLD multicast group entries.

Syntax

reset mld [ vpn-instance vpn-instance-name ] group { all | interface interface-type interface-number { all | ipv6-group-address [ prefix-length ] [ ipv6-source-address [ prefix-length ] ] } }

Views

User view

Predefined user roles

network-admin

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 clears dynamic MLD multicast group entries on the public network.

all: The first all specifies all interfaces, and the second all specifies all MLD multicast groups.

interface-type interface-number: Specifies an interface by its type and number.

ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you do not specify an IPv6 multicast source, this command clears dynamic MLD multicast group entries for all IPv6 multicast sources.

prefix-length: Specifies an address prefix length. The default is 128. For a multicast source address, the value range for this argument is 0 to 128. For a multicast group address, the value range for this argument is 8 to 128.

Usage guidelines

This command might interrupt the IPv6 multicast information transmission.

Examples

# Clear dynamic MLD multicast group entries for all interfaces on the public network.

<Sysname> reset mld group all

# Clear all dynamic MLD multicast group entries for VLAN-interface 100 on the public network.

<Sysname> reset mld group interface vlan-interface 100 all

# Clear the dynamic entry of MLD multicast group FF03::101:10 for VLAN-interface 100 on the public network.

<Sysname> reset mld group interface vlan-interface 100 ff03::101:10

Related commands

display mld group

robust-count (MLD view)

Use robust-count to set the MLD querier's robustness variable globally.

Use undo robust-count to restore the default.

Syntax

robust-count count

undo robust-count

Default

The MLD querier's robustness variable is 2.

Views

MLD view

Predefined user roles

network-admin

Parameters

Usage guidelines

You can set the MLD querier's robustness variable globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD querier's robustness variable to 5 on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] robust-count 5

Related commands

mld robust-count

ssm-mapping (MLD view)

Use ssm-mapping to configure an MLD SSM mapping.

Use undo ssm-mapping to delete MLD SSM mappings.

Syntax

ssm-mapping ipv6-source-address { ipv6-acl-number | name ipv6-acl-name }

undo ssm-mapping { ipv6-source-address | all }

Default

No MLD SSM mappings exist.

Views

MLD view

Predefined user roles

network-admin

Parameters

ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address.

ipv6-acl-number: Specifies an IPv6 basic or advanced ACL by its number in the range of 2000 to 3999. IPv6 multicast groups in MLD reports permitted by the ACL are associated with the IPv6 multicast source. If the ACL does not exist or does not have valid rules, no IPv6 multicast groups are associated with the IPv6 multicast source.

name ipv6-acl-name: Specifies an IPv6 basic or advanced ACL by its name, a case-insensitive string of 1 to 63 characters. The ACL name must begin with letters and it cannot be all. Multicast groups in MLD reports permitted by the ACL are mapped to the specified multicast source. If the ACL with the specified name does not exist or does not have valid rules, no IPv6 multicast groups are mapped to the specified multicast source.

all: Specifies all MLD SSM mappings.

Usage guidelines

When you configure a rule in the IPv6 basic ACL, follow these restrictions and guidelines:

· An IPv6 ACL rule containing the vpn-instance vpn-instance option does not take effect.

· The source source-address source-prefix option specifies an IPv6 multicast group address.

· Among the other optional parameters, only the fragment keyword and the time-range time-range-name option take effect.

Examples

# Configure an MLD SSM mapping with IPv6 multicast source 1::1 and IPv6 multicast group range FF3E::/64 on the public network.

<Sysname> system-view

[Sysname] acl ipv6 basic 2001

[Sysname-acl-ipv6-basic-2001] rule permit source ff3e:: 64

[Sysname-acl-ipv6-basic-2001] quit

[Sysname] mld

[Sysname-mld] ssm-mapping 1::1 2001

Related commands

display mld ssm-mapping

startup-query-count (MLD view)

Use startup-query-count to set the MLD startup query count globally.

Use undo startup-query-count to restore the default.

Syntax

startup-query-count count

undo startup-query-count

Default

The MLD startup query count equals the MLD querier's robustness variable.

Views

MLD view

Predefined user roles

network-admin

Parameters

Usage guidelines

You can set the MLD startup query count globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD startup query count to 5 on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] startup-query-count 5

Related commands

mld startup-query-count

startup-query-interval (MLD view)

Use startup-query-interval to set the MLD startup query interval globally.

Use undo startup-query-interval to restore the default.

Syntax

startup-query-interval interval

undo startup-query-interval

Default

The MLD startup query interval equals one quarter of the MLD general query interval.

Views

MLD view

Predefined user roles

network-admin

Parameters

interval: Specifies an MLD startup query interval in the range of 1 to 31744 seconds.

Usage guidelines

You can set the MLD startup query interval globally for all interfaces in MLD view or for an interface in interface view. For an interface, the interface-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD startup query interval to 100 seconds on the public network.

<Sysname> system-view

[Sysname] mld

[Sysname-mld] startup-query-interval 100

Related commands

mld startup-query-interval

06-IP Multicast Command Reference

display mld proxy group

mld group-policy

mld last-listener-query-count

mld version

other-querier-present-timeout (MLD view)

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