06-IP Multicast Command Reference

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12-MLD commands
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12-MLD commands 138.60 KB

MLD commands

The term "interface" in this chapter refers to VLAN interfaces.

display mld group

Use display mld group to display MLD information for IPv6 multicast groups.

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

Parameters

vpn-instance vpn-instance-name: Specifies a VPN 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 IPv6 multicast groups 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 FFx0::/16, FFx1::/16, FFx2::/16, and FF0y::), where "x" and "y" represent any hexadecimal numbers from 0 to F. If you do not specify an IPv6 multicast source, this command displays MLD information 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 MLD information for IPv6 multicast groups on all interfaces.

static: Specifies MLD information for IPv6 multicast groups that interfaces joined statically. If you do not specify this keyword, the command displays MLD information for IPv6 multicast groups that interfaces joined dynamically.

verbose: Displays detailed MLD information.

Examples

# Display MLD information for all IPv6 multicast groups that interfaces 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

Figure 1 Command output

Field

Description

MLD groups in total

Total number of IPv6 multicast groups.

MLD groups reported in total

Total number of IPv6 multicast groups that the interface has 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.

If the timer is disabled, this field displays Off.

 

# Display detailed MLD information for the IPv6 multicast group FF03::101 that interfaces dynamically joined on the public network. In this example, MLDv2 is running.

<Sysname> display mld group ff03::101 verbose

 Vlan-interface1(FE80::101):

  MLD groups reported in total: 1

   Group: FF03::101

     Uptime: 00:01:46

     Expires: Off

     Last reporter: FE80::10

     Last-listener-query-counter: 0

     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

          Expires: 00:04:11

          Last-listener-query-counter: 0

          Last-listener-query-timer-expiry: Off

Table 1 Command output

Field

Description

MLD groups reported in total

Total number of IPv6 multicast groups that the interface joined dynamically.

Group

IPv6 multicast group address.

Uptime

Length of time since the IPv6 multicast group was joined.

Expires

Remaining time for the IPv6 multicast group.

If the timer is disabled, this field displays Off.

Last reporter

IPv6 address of the host that last reported membership for this group.

Last-listener-query-counter

Number of multicast-address-specific queries or multicast-address-and-source-specific queries sent for this group.

Last-listener-query-timer-expiry

Remaining time for the MLD last listener of the multicast group.

If the timer is disabled, this field displays Off.

Group mode

Multicast source filtering mode:

·     IncludeInclude mode.

·     Exclude—Exclude mode.

This field is displayed only when the switch runs MLDv2.

Version1-host-present-timer-expiry

Remaining time for the MLDv1 host present timer.

If the timer is disabled, this field displays Off.

Source list (sources in total )

List of IPv6 multicast sources and total number of IPv6 multicast sources.

This field is displayed only when the switch runs MLDv2.

Source

IPv6 multicast source address.

This field is displayed only when the switch runs MLDv2.

Uptime

Length of time since the IPv6 multicast source was reported.

This field is displayed only when the switch runs MLDv2.

Expires

Remaining time for the IPv6 multicast source.

If the timer is disabled, this field displays Off.

This field is displayed only when the switch runs MLDv2.

Last-listener-query-counter

Number of multicast-address-specific queries or multicast-address-and-source-specific queries sent for this IPv6 multicast source and group.

This field is displayed only when the switch runs MLDv2.

Last-listener-query-timer-expiry

Remaining time for the last listener query timer of the IPv6 multicast source and group.

If the timer is disabled, this field displays Off.

This field is displayed only when the switch runs MLDv2.

 

# Display detailed MLD information for the IPv6 multicast groups that interfaces dynamically 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

Figure 2 Command output

Field

Description

Entries in total

Total number of IPv6 multicast groups.

(*, FF03::101)

(*, G) entry.

(2001::101, FF3E::202)

(S, G) entry.

Interface

Interface name.

Expires

Remaining time for the IPv6 multicast group.

The timer is disabled, and this field displays Never.

 

Related commands

reset mld group

display mld interface

Use display mld interface to display MLD information for an interface.

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies a VPN 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 MLD-enabled interfaces.

verbose: Displays detailed MLD information.

Examples

# Display detailed MLD information for VLAN-interface 1 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

   SSM-mapping: Disabled

   SSM-mapping: Disabled

   Startup-query: Off

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

   MLD groups reported in total: 1

Table 2 Command output

Field

Description

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

Interface and IPv6 link-local address.

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 general query messages, in seconds.

Last listener query interval

MLD last listener query interval, 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.

If the timer is disabled, this field displays Off.

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 and forwarding is enabled.

Robustness

Robustness variable of the MLD querier.

Require-router-alert

Whether the function of dropping MLD messages without Router-Alert is enabled.

Fast-leave

Whether the MLD fast-leave processing feature is enabled.

SSM-mapping

Whether the MLD SSM mapping feature is enabled.

Startup-query

Whether the MLD querier sends MLD general queries at the startup query interval on startup:

·     OnThe MLD querier performs the above action.

·     OffThe MLD querier does not perform the above action.

Other-querier-present-timer-expiry

Remaining time for MLD other querier present timer.

If the timer is disabled, this field displays Off.

MLD groups reported in total

Total number of IPv6 multicast groups the interface joined dynamically.

This field is not displayed if the interface does not join IPv6 multicast groups.

 

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 a VPN 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 SSM mappings 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 FFx0::/16, FFx1::/16, FFx2::/16, and FF0y::), where "x" and "y" represent any hexadecimal numbers from 0 to F.

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 3 Command output

Fields

Description

Group

IPv6 multicast group address.

Source list

List of IPv6 multicast source addresses.

 

last-listener-query-count (MLD view)

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

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

count: Specifies an MLD last listener query count in the range of 1 to 255.

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 global 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 remove the configurations made 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 a VPN instance 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 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 all interfaces.

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 an interface take effect only when MLD is enabled on the interface.

Examples

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

<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 acl6-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 MLD done messages.

Views

Interface view

Predefined user roles

network-admin

Parameters

acl6-number: Specifies an IPv6 basic ACL by its number in the range of 2000 to 2999. If you specify an ACL, this command takes effect only on the IPv6 multicast groups that the ACL permits. This command 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 contain valid rules.

Usage guidelines

This feature enables an MLD querier to send leave notifications to the upstream routers without sending multicast-address-specific or multicast-address-and-source-specific queries after receiving done messages.

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

·     For the rule to take effect, do not specify the vpn-instance vpn-instance option.

·     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 MLD 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 the hosts attached to the interface can join.

Use undo mld group-policy to remove the configured IPv6 multicast group policy.

Syntax

mld group-policy acl6-number [ version-number ]

undo mld group-policy

Default

IPv6 multicast group polices are not configured on an interface, and hosts attached to the interface can join IPv6 multicast groups.

Views

Interface view

Predefined user roles

network-admin

Parameters

acl6-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 specified ACL does not exists or the specified ACL does not contain valid rules, receiver hosts cannot join IPv6 multicast groups.

version-number: Specifies an MLD version number, 1 or 2. By default, the configured group filter is effective on both MLDv1 reports and MLDv2 reports.

Usage guidelines

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

·     For the rule to take effect, do not specify the vpn-instance vpn-instance option.

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

To match the following MLD reports, set the source source-address source-prefix option to 0::0:

¡     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.

This command controls the IPv6 multicast groups that the receiver hosts can join by filtering MLD messages. This command does not take effect on a static member interface because the static member interface does not send MLD messages.

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 number 2005

[Sysname-acl6-basic-2005] rule permit source ff03::101 128

[Sysname-acl6-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

count: Specifies an MLD last listener query count in the range of 1 to 255.

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 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

count: Specifies an MLD querier's robustness variable in the range of 1 to 255.

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

count: Specifies an MLD startup query count in the range of 1 to 255.

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 group member of IPv6 multicast groups.

Views

Interface view

Predefined user roles

network-admin

Parameters

ipv6-group-address: Specifies an IPv6 multicast group by its IPv6 address. The value range for this argument is FFxy::/16 (excluding FFx0::/16, FFx1::/16, FFx2::/16, and FF0y::), where "x" and "y" represent any hexadecimal numbers from 0 to F.

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

If the IPv6 multicast address is in the SSM multicast address range, you must specify an IPv6 multicast source address at the same time. Otherwise IPv6 multicast routing entries cannot be established. This restriction does not exist if the specified IPv6 multicast group address is not in the SSM multicast address 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 the 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.

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 global MLD other querier present timer.

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 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

query-interval (MLD view)

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

Use undo query-interval to restore the default.

Syntax

query-interval interval

undo query-interval

Default

The global 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 remove dynamic MLD 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 a VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command removes dynamic MLD group entries on the public network.

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

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

ipv6-group-address: Specifies an IPv6 multicast group by its IPv6 address in the range of FFxy::/16, where "x and "y" represent any hexadecimal numbers from 0 to F.

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

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

# Remove the dynamic group entries for all MLD groups on all interfaces on the public network.

<Sysname> reset mld group all

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

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

# Remove the dynamic group entry for the MLD group FF03::101:10 on 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 global MLD querier's robustness variable.

Use undo robust-count to restore the default.

Syntax

robust-count count

undo robust-count

Default

The global MLD querier's robustness variable is 2.

Views

MLD view

Predefined user roles

network-admin

Parameters

count: Specifies an MLD querier's robustness variable in the range of 1 to 255.

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 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 MLD SSM mappings.

Use undo ssm-mapping to remove MLD SSM mappings.

Syntax

ssm-mapping ipv6-source-address acl6-number

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

Default

MLD SSM mappings are not configured.

Views

MLD view

Predefined user roles

network-admin

Parameters

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

acl6-number: Specifies an IPv6 basic ACL number in the range of 2000 to 2999. The specified IPv6 multicast source is mapped only to IPv6 multicast groups that the ACL permits. If the ACL does not exist or the ACL does not have valid rules, the specified IPv6 multicast source is not mapped to IPv6 multicast groups.

all: Removes all the MLD SSM mappings.

Usage guidelines

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

·     For the rule to take effect, do not specify the vpn-instance vpn-instance option.

·     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

# Map IPv6 multicast source 1::1 to IPv6 multicast groups in the range of FF3E::/64 on the public network.

<Sysname> system-view

[Sysname] acl ipv6 number 2001

[Sysname-acl6-basic-2001] rule permit source ff3e:: 64

[Sysname-acl6-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 global MLD startup query count.

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

Syntax

startup-query-count count

undo startup-query-count

Default

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

Views

MLD view

Predefined user roles

network-admin

Parameters

count: Specifies an MLD startup query count in the range of 1 to 255.

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 global MLD startup query interval.

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

Syntax

startup-query-interval interval

undo startup-query-interval

Default

The global 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