9.2. MLD Commands

Command Purpose

Use this command to apply an access-list to the mld interface.

To remove this setting, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld access-group LISTNAME

no ipv6 mld access-group

Command Mode

Interface Configuration

Default

Access-group is not configured on any mld interface by default.

Usage

No matter the source ipv6 prefix or the destination ipv6 prefix in ACE should take effect respectively. If ACE’s action is deny, then the packet will be ignored; Otherwise if it matches one whose action is permit, then it will be processed regularly.

Examples

This example shows how to apply the access-list acl1 to the interface vlan1:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld access-group acl1

This example shows how to remove the access-list acl1 on the interface:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld access-group

Related Commands

show ipv6 mld interface

Command Purpose

Use this command to set the value of last member query count.

To return it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld last-member-query-count COUNT

no ipv6 mld last-member-query-count

Command Mode

Interface Configuration

Default

2

Usage

None

Examples

This example shows how to set the value of last member query count to 5:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld last-member-query-count 5

This example shows how to return the value of last member query count to default value:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld last-member-query-count

Related Commands

show ipv6 mld interface

ipv6 mld last-member-query-interval

Command Purpose

Use this command to set the value of last member query interval.

To reset it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld last-member-query-interval INTERVAL

no ipv6 mld last-member-query-interval

Command Mode

Interface Configuration

Default

1000

Usage

None

Examples

This example shows how to set the last member query interval value to 10000ms:

Switch# configure terminal
Switch(config)# ipv6 mld snooping last-member-query-interval 2000

This example shows how to reset the last member query interval value to default value:

Switch# configure terminal
Switch(config)# no ipv6 mld snooping last-member-query-interval

Related Commands

show ipv6 mld interface

ipv6 mld last-member-query-count

Command Purpose

Use this command to set the max num of groups allowed.

To reset it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld limit NUMBER ( except LISTNAME | )

no ipv6 mld limit

Command Mode

Global Config & Interface Configuration

Default

4096

Usage

Max number of groups is 4096 by default,in Global Config mode, use this command to set number of groups for all ports, in interface configuration mode, use this command to set number of groups for one ports

Examples

This example shows how to set the max num of groups allowed to 1000 globally:

Switch# configure terminal
Switch(config)# ipv6 mld limit 1000

This example shows how to reset the max num of groups to default value:

Switch# configure terminal
Switch(config)# no ipv6 mld limit

Related Commands

show ipv6 mld interface

Command Purpose

Use this command to set the mroute-proxy port on this interface.

To remove it, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld mroute-proxy IFNAME

no ipv6 mld mroute-proxy IFNAME

Command Mode

Interface Configuration

Default

None

Usage

This command is used to set the mroute-proxy port on the interface. Only one mroute-proxy port can be set on the interface. When set it again, the new setting will overwrite the old one.

Examples

This example shows how to set the mroute-proxy port to eth-0-1 on this interface:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld mroute-proxy eth-0-1

This example shows how to remove the mroute-proxy port on this interface:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld mroute-proxy

Related Commands

ipv6 mld proxy-service

Command Purpose

Use this command to enable mld mroute proxy service on the interface.

To disable it, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld proxy-service

no ipv6 mld proxy-service

Command Mode

Interface Configuration

Default

None

Usage

This command is used with command ipv6 mld mroute-proxy and to set the upstream interface of the mld group.

Examples

This example shows how to enable mld mroute proxy service on this interface:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld proxy-service

This example shows how to disable mld mroute proxy service:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld proxy-service

Related Commands

ipv6 mld mroute-proxy

Command Purpose

Use this command to set the mld previous querier timeout value.

To reset it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld querier-timeout INTERVAL

no ipv6 mld querier-timeout

Command Mode

Interface Configuration

Default

255s

Usage

None

Examples

This example shows how to set the mld previous querier timeout value to 100 seconds:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld querier-timeout 100

This example shows how to reset the mld previous querier timeout value to default value:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld querier-timeout

Related Commands

ipv6 mld query-interval

ipv6 mld query-max-response-time

Command Purpose

Use this command to set the mld query interval.

To reset it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld query-interval INTERVAL

no ipv6 mld query-interval

Command Mode

Interface Configuration

Default

125s

Usage

None

Examples

This example shows how to set the mld query interval to 300 seconds:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld query-interval 300

This example shows how to return the mld query interval to default value:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld query-interval

Related Commands

ipv6 mld querier-timeout

ipv6 mld query-max-response-time

Command Purpose

Use this command to set the mld query max response time.

To reset it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld query-max-response-time INTERVAL

no ipv6 query-max-response-time

Command Mode

Interface Configuration

Default

10s

Usage

Query max response time must be less than mld query interval.

Examples

This example shows how to set the mld query max response time to 20 seconds:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld query-max-response-time 20

This example shows how to return the mld query max response time to default value:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld query-max-response-time

Related Commands

ipv6 mld querier-timeout

ipv6 mld query-interval

Command Purpose

Use this command to set the mld querier robustness variable value.

To reset it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld robustness-variable VALUE

no ipv6 robustness-variable

Command Mode

Interface Configuration

Default

2

Usage

None

Examples

This example shows how to set the mld querier robustness variable value to 6:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld robustness-variable 6

This example shows how to reset the mld querier robustness variable value to default value:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld robustness-variable

Related Commands

show ipv6 mld interface

Command Purpose

Use this command to set the mld version on interface.

To return it to default value, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld version NUMBER

no ipv6 version

Command Mode

Interface Configuration

Default

1

Usage

None

Examples

This example shows how to set the mld version 2 on the interface:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# ipv6 mld version 2

This example shows how to return the mld version to default value:

Switch# configure terminal
Switch(config)# interface vlan 1
Switch(config-if)# no ipv6 mld version

Related Commands

show ipv6 mld interface

Command Purpose

Use this command to configure the static multicast group on interface.

To delete static group, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld static-group GRP_IPV6_ADDR ( source SRC_IPV6_ADDR | )

no ipv6 mld static-group GRP_IPV6_ADDR ( source SRC_IPV6_ADDR | )

Command Mode

Interface Configuration

Default

None

Usage

None

Examples

This example shows how to configure the static mld group on interface:

Switch# configure terminal
Switch(config)# interface eth-0-1
Switch(config-if)# ipv6 mld static-group ff0e::1234
Switch(config-if)# ipv6 mld static-group ff0e::1234 source 2001::2

This example shows how to delete static mld group on interface:

Switch# configure terminal
Switch(config)# interface eth-0-1
Switch(config-if)# no ipv6 mld static-group ff02::1234

Related Commands

show ipv6 mld groups

Command Purpose

Use this command to enable mld ssm mapping.

To disable ssm mapping, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld ssm-map enable

no ipv6 mld ssm-map enable

Command Mode

Global Config

Default

Disable

Usage

None

Examples

This example shows how to enable mld ssm mapping:

Switch# configure terminal
Switch(config)# ipv6 mld ssm-map enable

This example shows how to disable mld ssm mapping:

Switch# configure terminal
Switch(config)# no ipv6 mld ssm-map enable

Related Commands

None

Command Purpose

Use this command to set mld ssm mapping.

To cancel ssm mapping setting, use the no form of this command.

Prerequisites

Command Syntax

ipv6 mld ssm-map static LISTNAME SRC_IPV6_ADDR

no ipv6 mld ssm-map static LISTNAME SRC_IPV6_ADDR

Command Mode

Global Config

Default

Disable

Usage

None

Examples

This example shows how to set mld ssm mapping:

Switch# configure terminal
Switch(config)# ipv6 mld ssm-map static ipacl 2001::2

This example shows how to unset mld ssm mapping:

Switch# configure terminal
Switch(config)# no ipv6 mld ssm-map static ipacl 2001::2

Related Commands

None

Command Purpose

Use this command to clear mld groups.

Prerequisites

Command Syntax

clear ipv6 mld group ( * | IPV6_ADDR )

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to clear mld group all:

Switch# clear ipv6 mld
Switch# clear ipv6 mld group *

This example shows how to clear mld specified group:

Switch# clear ipv6 mld group ff02::1234

Related Commands

show ipv6 mld groups

Command Purpose

Use this command to clear mld groups on specified interface.

Prerequisites

Command Syntax

clear ipv6 mld ( group IPV6_ADDR | interface ) IFNAME

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to clear mld group on specified interface:

Switch# clear ipv6 mld interface eth-0-1

Related Commands

show ipv6 mld groups

Command Purpose

Use this command to show the information about mld groups.

Prerequisites

Command Syntax

show ipv6 mld groups IPV6_ADDR ( detail | )

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to display the detail information about mld groups:

Switch# show ipv6 mld groups detail

MLD Connected Group Membership Details for eth-0-2
Interface:      eth-0-2
Group:          ff0e::1234:5678
Uptime:         00:00:10
Group mode:     Exclude (Expires: 00:04:10)
Last reporter:  fe80:1111:1111:1111:1111:1111:1111:1111
Source list is empty

Related Commands

None

Command Purpose

Use this command to show the information about mld groups on interface.

Prerequisites

Command Syntax

show ipv6 mld groups IFNAME ( IPV6_ADDR | ) ( detail | )

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to display the information about mld groups on interface eth-0-1:

Switch# show ipv6 mld groups eth-0-1

MLD Connected Group Membership
Group Address                           Interface            Expires
ff0e::1234:5678                         eth-0-2              00:03:01

Related Commands

None

Command Purpose

Use this command to show mld group number.

Prerequisites

Command Syntax

show ipv6 mld groups ( IFNAME | ) count

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to display the mld group number on interface eth-0-1:

Switch# show ipv6 mld groups eth-0-1 count

Dynamic multicast groups count: 1
Static multicast groups count: 0
Total multicast groups count: 1

Related Commands

None

Command Purpose

Use this command to show the information about mld on interface.

Prerequisites

Command Syntax

show ipv6 mld interface ( IFNAME | )

Command Mode

Privileged EXEC

Default

None

Usage

None

Examples

This example shows how to display the information about mld on interface eth-0-1:

Switch# show ipv6 mld interface eth-0-1

Interface eth-0-1 (Index 1)
MLD Active, Querier, Version 1 (default)
Internet address is fe80::9c7c:7eff:fe94:8300
MLD interface has 0 group-record states
MLD activity: 0 joins, 0 leaves
MLD query interval is 125 seconds
MLD querier timeout is 255 seconds
MLD max query response time is 10 seconds
Last member query response interval is 1000 milliseconds
Group Membership interval is 260 seconds

Related Commands

None