ipv6-source-address: Specifies an IPv6 multicast source address. If you do not specify an IPv6 multicast source, this command displays Layer 2 IPv6 multicast forwarding entries for all IPv6 multicast sources.

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 Layer 2 IPv6 multicast forwarding entries for all IPv6 multicast groups.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays Layer 2 IPv6 multicast fast forwarding entries for the MPU.

Examples

# Display Layer 2 IPv6 multicast fast forwarding entries.

<Sysname> display ipv6 l2-multicast fast-forwarding cache

Total 1 entries, 1 matched

(1::6, FF1E::2)

Status : Enable VLAN : 1

Source port : 9876 Destination port: 5432

Protocol : 17 Flag : 0x2

Ingress port: GigabitEthernet0/0/2

List of 1 egress ports:

GigabitEthernet0/0/1

Status: Enable Flag: 0x10

Table 1 Command output

Field	Description
Total 1 entries, 1 matched	Total number of (S, G) entries in the Layer 2 IPv6 multicast fast forwarding table, and the total number of matching entries.
(1::6, FF1E::2)	(S, G) entry in the Layer 2 IPv6 multicast fast forwarding table.
Protocol	Protocol number.
VLAN	VLAN ID.
Flag	Flag for the (S, G) entry or the outgoing port. This field displays one flag or the sum of multiple flags. In this example, the value 0x2 means that the entry has only one flag 0x2. The following flags are available for an entry: · 0x1—The entry is created because of packets passed through between cards. · 0x2—The entry is added by multicast forwarding. The following flags are available for an outgoing interface: · 0x1—The port is added to the entry because of packets passed through between cards. · 0x2—The port is added to an existing entry. · 0x10—The port is associated with the entry. · 0x20—The port is to be deleted.
Status	Status of the (S, G) entry or the outgoing port: · Enabled—Available. · Disabled—Unavailable.
Ingress port	Incoming port of the (S, G) entry.
List of 1 egress ports	List of outgoing ports of the (S, G) entry.

Related commands

reset ipv6 l2-multicast fast-forwarding cache all

display ipv6 l2-multicast ip

Use display ipv6 l2-multicast ip to display information about Layer 2 IPv6 multicast groups.

Syntax

display ipv6 l2-multicast ip [ group ipv6-group-address | source ipv6-source-address ] * [ vlan vlan-id ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

group ipv6-group-address: Specifies an IPv6 multicast group by its IPv6 address. If you do not specify an IPv6 multicast group, this command displays information about all Layer 2 IPv6 multicast groups.

source ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you do not specify an IPv6 multicast source, this command displays information about Layer 2 IPv6 multicast groups for all IPv6 multicast sources.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command displays information about Layer 2 IPv6 multicast groups for all VLANs.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays information about Layer 2 IP multicast groups for the MPU.

Examples

# Display information about Layer 2 IPv6 multicast groups for VLAN 2.

<Sysname> display ipv6 l2-multicast ip vlan 2

Total 1 entries.

VLAN 2: Total 1 entries.

(::, FF1E::101)

Attribute: static, success

Host ports (1 in total):

GE0/0/1 (S, SUC)

Table 2 Command output

Field	Description
Total 1 entries	Total number of Layer 2 IPv6 multicast groups.
VLAN 2: Total 1 entries	Total number of Layer 2 IPv6 multicast groups in VLAN 2.
(::, FF1E::101)	(S, G) entry, where a double colon (::) in the S position means all IPv6 multicast sources.
Attribute	Entry attribute: · dynamic—The entry is created by a dynamic protocol. · static—The entry is created by a static protocol. · pim—The entry is created by IPv6 PIM. · kernel—The entry is obtained from the forwarding module. · success—Processing has succeeded. · fail—Processing has failed.
Host ports (1 in total)	Member ports and total number of member ports.
(S, SUC)	Port attribute: · D—Dynamic port. · S—Static port. · P—IPv6 PIM port. · K—Port obtained from the forwarding module. · R—Port learned from (, ) entries. · W—Port learned from (*, G) entries. · SUC—Processing has succeeded. · F—Processing has failed. · BC—In a VSI, the port is a multicast tunnel port for a multicast-mode VXLAN.
GE0/0/3 (Link ID 0)	AC and its link ID.
NPW (Link ID 8)	N-PW and its link ID.
UPW (Link ID 9)	U-PW and its link ID.
Tun1 (VXLAN ID 0)	VXLAN tunnel and its VXLAN ID.

display ipv6 l2-multicast ip forwarding

Use display ipv6 l2-multicast ip forwarding to display Layer 2 IPv6 multicast IP forwarding entries.

Syntax

display ipv6 l2-multicast ip forwarding [ group ipv6-group-address | source ipv6-source-address ] * [ vlan vlan-id ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

group ipv6-group-address: Specifies an IPv6 multicast group by its IPv6 address. If you do not specify an IPv6 multicast group, this command displays Layer 2 IPv6 multicast IP forwarding entries for all IPv6 multicast groups.

source ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you do not specify an IPv6 multicast source, this command displays Layer 2 IPv6 multicast IP forwarding entries for all IPv6 multicast sources.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command displays Layer 2 IPv6 multicast IP forwarding entries for all VLANs.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays the Layer 2 IPv6 multicast IP forwarding entries for the MPU.

Examples

# Display Layer 2 IPv6 multicast IP forwarding entries for VLAN 2.

<Sysname> display ipv6 l2-multicast ip forwarding vlan 2

Total 1 entries.

VLAN 2: Total 1 entries.

(::, FF1E::101)

Host ports (3 in total):

GigabitEthernet0/0/1

GigabitEthernet0/0/2

GigabitEthernet0/0/3

Table 3 Command output

Field	Description
Total 1 entries	Total number of Layer 2 IPv6 multicast IP forwarding entries.
VLAN 2: Total 1 entries	Total number of Layer 2 IPv6 multicast IP forwarding entries in VLAN 2.
(::, FF1E::101)	(S, G) entry, where a double colon (::) in the S position means all IPv6 multicast sources.
Host ports (3 in total)	Member ports and total number of member ports.
GigabitEthernet0/0/3 (Link ID 0)	AC and its link ID.
NPW (Link ID 8)	N-PW and its link ID.
UPW (Link ID 9)	U-PW and its link ID.
Tunnel1 (VXLAN ID 0)	VXLAN tunnel and its VXLAN ID.

display ipv6 l2-multicast mac

Use display ipv6 l2-multicast mac to display information about Layer 2 IPv6 multicast MAC multicast groups.

Syntax

display ipv6 l2-multicast mac [ mac-address ] [ vlan vlan-id ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

mac-address: Specifies an IPv6 multicast MAC address. If you do not specify an IPv6 multicast MAC address, this command displays information about all Layer 2 IPv6 multicast MAC multicast groups.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command displays information about Layer 2 IPv6 multicast MAC multicast groups for all VLANs.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays information about the Layer 2 IPv6 multicast MAC multicast groups for the MPU.

Examples

# Display information about Layer 2 IPv6 multicast MAC multicast groups for VLAN 2.

<Sysname> display ipv6 l2-multicast mac vlan 2

Total 1 entries.

VLAN 2: Total 1 entries.

MAC group address: 3333-0000-0101

Attribute: success

Host ports (1 in total):

GE0/0/1

Table 4 Command output

Field	Description
Total 1 entries	Total number of Layer 2 IPv6 MAC multicast groups.
VLAN 2: Total 1 entries	Total number of Layer 2 IPv6 MAC multicast groups in VLAN 2.
MAC group address	IPv6 address of the Layer 2 IPv6 MAC multicast group.
Attribute	Entry attribute: · success—Processing has succeeded. · fail—Processing has failed.
Host ports (1 in total)	Member ports and total number of member ports.
GE0/0/3 ( Link ID 0)	AC and its link ID.
NPW (Link ID 8)	N-PW and its link ID.
UPW (Link ID 9)	U-PW and its link ID.
Tun1 (VXLAN ID 0)	VXLAN tunnel and its VXLAN ID.

display ipv6 l2-multicast mac forwarding

Use display ipv6 l2-multicast mac forwarding to display Layer 2 IPv6 multicast MAC forwarding entries.

Syntax

display ipv6 l2-multicast mac forwarding [ mac-address ] [ vlan vlan-id ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

mac-address: Specifies an IPv6 MAC multicast group by its IPv6 MAC address. If you do not specify an IPv6 MAC multicast group, this command displays Layer 2 IPv6 multicast MAC forwarding entries for all IPv6 MAC multicast groups.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command displays Layer 2 IPv6 multicast MAC forwarding entries for all VLANs.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays Layer 2 IPv6 multicast MAC forwarding entries for the MPU.

Examples

# Display Layer 2 IPv6 multicast MAC forwarding entries for VLAN 2.

<Sysname> display ipv6 l2-multicast mac forwarding vlan 2

Total 1 entries.

VLAN 2: Total 1 entries.

MAC group address: 3333-0000-0101

Host ports (3 in total):

GigabitEthernet0/0/1

GigabitEthernet0/0/2

GigabitEthernet0/0/3

Table 5 Command output

Field	Description
Total 1 MAC entries	Total number of Layer 2 IPv6 multicast MAC forwarding entries.
VLAN 2: Total 1 entries	Total number of Layer 2 IPv6 multicast MAC forwarding entries in VLAN 2.
MAC group address	Address of the IPv6 MAC multicast group.
Host ports (3 in total)	Member ports, and the total number of member ports.
GigabitEthernet0/0/3 (Link ID 0)	AC and its link ID.
NPW (Link ID 8)	N-PW and its link ID.
UPW (Link ID 9)	U-PW and its link ID.
Tunnel1 (VXLAN ID 0)	VXLAN tunnel and its VXLAN ID.

display mld-snooping

Use display mld-snooping to display MLD snooping status.

Syntax

display mld-snooping [ global | vlan vlan-id ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

global: Displays the global MLD snooping status.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094.

Usage guidelines

If you do not specify any parameters, this command displays the global MLD snooping status and the MLD snooping status in all VLANs.

Examples

# Display the global MLD snooping status and the MLD snooping status for all VLANs.

<Sysname> display mld-snooping

MLD snooping information: Global

Global-enable: Enabled

Host-aging-time: 260s

Router-aging-time: 260s

Max-response-time: 10s

Last-listener-query-interval: 1s

Report-aggregation: Enabled

Host-tracking: Disabled

Dot1p-priority: --

M-LAG: Enabled (Peer-link interface: Bridge-Aggregation 1)

MLD snooping information: VLAN 1

MLD snooping: Enabled

Drop-unknown: Disabled

Version: 1

Host-aging-time: 260s

Router-aging-time: 260s

Max-response-time: 10s

Last-listener-query-interval: 1s

Querier: Enabled (IP: FE80::2FF:FFFF:FE00:1, Expires: 00:02:05)

Querier-election: Enabled

Query-interval: 125s

General-query source IP: FE80::2FF:FFFF:FE00:1

Special-query source IP: FE80::2FF:FFFF:FE00:1

Report source IP: FE80::2FF:FFFF:FE00:2

Done source IP: FE80::2FF:FFFF:FE00:3

Host-tracking: Disabled

Dot1p-priority: 2

Router-port-discard: Disabled

Proxy: Disabled

Peer-link interface: Bridge-Aggregation 1

MLD snooping information: VLAN 10

MLD snooping: Enabled

Drop-unknown: Enabled

Version: 1

Host-aging-time: 260s

Router-aging-time: 260s

Max-response-time: 10s

Last-listener-query-interval: 1s

Querier: Enabled (IP: FE80::2FF:FFFF:FE00:1, Expires: 00:02:05)

Querier-election: Enabled

Query-interval: 125s

General-query source IP: FE80::2FF:FFFF:FE00:1

Special-query source IP: FE80::2FF:FFFF:FE00:1

Report source IP: FE80::2FF:FFFF:FE00:2

Done source IP: FE80::2FF:FFFF:FE00:3

Host-tracking: Disabled

Dot1p-priority: --

Proxy: Disabled

Peer-link interface: Bridge-Aggregation 1

MLD snooping information: VSI aaa

MLD snooping: Enabled

Version: 1

Host-aging-time: 260s

Router-aging-time: 260s

Max-response-time: 10s

Last-listener-query-interval: 1s

Querier: Disabled

Querier-election: Disabled

Query-interval: 125s

General-query source IP: FE80::2FF:FFFF:FE00:1

Special-query source IP: FE80::2FF:FFFF:FE00:1

Report source IP: FE80::2FF:FFFF:FE00:2

Done source IP: FE80::2FF:FFFF:FE00:3

Proxy: Disabled

Peer-link interface: Bridge-Aggregation 1 (Link ID: 0x1001)

Table 6 Command output

Field	Description
Global-enable	Global MLD snooping status: · Enabled. · Disabled.
MLD snooping	MLD snooping status in a VLAN: · Enabled. · Disabled. · Globally enabled. · Inactive—MLD snooping configuration does not take effect.
Drop-unknown	Status of dropping unknown IPv6 multicast data: · Enabled. · Disabled.
Version	MLD snooping version.
Host-aging-time	Aging timer for the dynamic member port.
Router-aging-time	Aging timer for the dynamic router port.
Max-response-time	Maximum time for responding to MLD general queries.
Last-listener-query-interval	Interval for sending MLD multicast-address-specific queries.
Report-aggregation	Status of MLD report suppression: · Enabled. · Disabled.
Dot1p-priority	802.1p priority for MLD messages. This field displays two hyphens (--) if the 802.1p priority is not configured.
Querier	Status of MLD snooping querier: · Enabled. · Disabled.
(IP: FE80::2FF:FFFF:FE00:1, Expires: 00:02:05)	MLD snooping querier information: · IP—IP address of the MLD snooping querier. · Expire—Remaining aging time for the MLD snooping querier. This field is not displayed if MLD snooping querier election is disabled.
Querier-election	Status of MLD snooping querier election: · Enabled. · Disabled.
Query-interval	Interval for sending MLD general queries.
General-query source IP	Source IPv6 address of MLD general queries.
Special-query source IP	Source IPv6 address of MLD multicast-address-specific queries.
Report source IP	Source IPv6 address of MLD reports.
Done source IP	Source IPv6 address of MLD done messages.
Host-tracking	Status of host tracking: · Enabled. · Disabled. · Globally enabled.
Proxy	Status of MLD snooping proxying: · Enabled. · Disabled.
M-LAG	Status of M-LAG: · Enabled. · Disabled
Peer-link interface	M-LAG peer-link interface.
Link ID	Link ID for the M-LAG peer-link interface in the VSI.

display mld-snooping group

Use display mld-snooping group to display information about dynamic MLD snooping group entries.

Syntax

display mld-snooping group [ ipv6-group-address | ipv6-source-address ] * [ vlan vlan-id ] [ interface interface-type interface-number | [ verbose ] [ slot slot-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

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 dynamic MLD snooping group entries.

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

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command displays information about dynamic MLD snooping group entries for all VLANs.

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

verbose: Displays detailed information about dynamic MLD snooping group entries. If you do not specify this keyword, the command displays brief information about dynamic MLD snooping group entries.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays information about dynamic MLD snooping group entries for the MPU.

Examples

# Display brief information about dynamic MLD snooping group entries for GigabitEthernet 0/0/1.

<Sysname> display mld-snooping group interface

Total 1 entries.

GE0/0/1:

VLAN 2: Total 1 entries.

(::,FF1E::101) (00:03:23)

# Display detailed information about dynamic MLD snooping group entries for VLAN 2.

<Sysname> display mld-snooping group vlan 2 verbose

Total 1 entries.

VLAN 2: Total 1 entries.

(::,FF1E::101)

Attribute: local port

FSM information: normal

Host slots (0 in total):

Host ports (1 in total):

GE0/0/2 (00:03:23)

Table 7 Command output

Field	Description
Total 1 entries	Total number of dynamic MLD snooping group entries.
VLAN 2: Total 1 entries	Total number of dynamic MLD snooping group entries in VLAN 2.
(::, FF1E::101)	(S, G) entry, where a double colon (::) in the S position means all IPv6 multicast sources.
Attribute	Entry attribute: · global port—The entry has a global port. · local port—The entry has a port that resides on the card for which the information is displayed. · slot—The entry has ports that reside on other cards, but not on the card for which the information is displayed.
FSM information	Finite state machine information of the entry: · delete—The entry attributes have been deleted. · dummy—The entry is a new temporary entry. · no info—The entry does not exist. · normal—The entry is a correct entry.
Host slots (0 in total)	Slot numbers and total number of the cards that have member ports, except for the specified card or the MPU when no card is specified.
Host ports (1 in total)	Member ports and total number of member ports.
(00:03:23)	Remaining aging time for the dynamic member port. This field is always displayed for a global port (such as Layer 2 aggregate interfaces, ACs, N-PWs, and U-PWs). For a non-global port, this field is displayed when one of the following conditions exists: · The port is on the specified card. · The port is on the MPU and no card is specified.
GE0/0/3 (Link ID 0)	AC and its link ID.
NPW (Link ID 8)	N-PW and its link ID.
UPW (Link ID 9)	U-PW and its link ID.
Tun1 (VXLAN ID 0)	VXLAN tunnel and its VXLAN ID.
VLAN pairs (1 in total)	VLAN pairs and total number of VLAN pairs.
Outer VLAN 5 Inner VLAN 2	Outer VLAN ID and inner VLAN ID.

Related commands

reset mld-snooping group

display mld-snooping host-tracking

Use display mld-snooping host-tracking to display host tracking information.

Syntax

display mld-snooping host-tracking vlan vlan-id group ipv6-group-address [ source ipv6-source-address ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094.

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

source ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you do not specify an IPv6 multicast source, this commands displays host tracking information for all IPv6 multicast sources.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays host tracking information for the MPU.

Examples

# Display tracking information for hosts that have joined IPv6 multicast group FF1E::2 in VLAN 2.

<Sysname> display mld-snooping host-tracking vlan 2 group FF1E::2

VLAN 2

(1::6, FF1E::2)

Port: GE0/0/1

Host Uptime Expires

1::2 00:02:20 00:00:40

1::3 00:02:21 00:00:39

Table 8 Command output

Field	Description
VLAN	VLAN ID.
(1::6, FF1E::2)	(S, G) entry, where 0::0 in the S position means any IPv6 multicast sources.
Port	Member port.
Host	IPv6 address of the host.
Uptime	Length of time elapsed since the host joined the IPv6 multicast group.
Expires	Remaining timeout time for the host. The host timeout time is the same as the aging timer of the port. The timer is reset when the port receives an MLD report from the host. This field displays timeout if the host times out.

Related commands

host-tracking (MLD-snooping view)

mld-snooping enable

mld-snooping host-tracking

display mld-snooping router-port

Use display mld-snooping router-port to display dynamic router port information.

Syntax

display mld-snooping router-port [ vlan vlan-id ] [ verbose ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

verbose: Displays detailed information about dynamic router ports. If you do not specify this keyword, the command displays brief information about dynamic router ports.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command displays dynamic router port information for all VLANs.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays dynamic router port information for the MPU.

Examples

# Display brief information about dynamic router ports for VLAN 2.

<Sysname> display mld-snooping router-port vlan 2

VLAN 2:

Router ports (2 in total):

GE0/0/1 (00:01:30)

GE0/0/2 (00:00:23)

# Display detailed information about dynamic router ports for VLAN 2.

<Sysname> display mld-snooping router-port vlan 2 verbose

VLAN 2:

Router slots (0 in total):

Router ports (2 in total):

GE0/0/1 (00:01:30)

GE0/0/2 (00:00:23)

Table 9 Command output

Field	Description
VLAN 2	VLAN ID.
Router slots (0 in total)	Slot numbers and total number of the cards that have dynamic router ports, except for the specified card or the MPU when no card is specified.
Router ports (2 in total)	Dynamic router ports and total number of dynamic router ports.
(00:01:30)	Remaining aging time for the dynamic router port. This field is always displayed for a global port. For a non-global port, this field is displayed when one of the following conditions exists: · The port is on the specified card. · The port is on the MPU and no card is specified.
GE0/0/3 (Link ID 0)	AC and its link ID.
NPW (Link ID 8)	N-PW and its link ID.
UPW (Link ID 9)	U-PW and its link ID.
Tun1 (VXLAN ID 0)	Name of the VXLAN tunnel and the VXLAN ID.
VLAN pairs (1 in total)	VLAN pairs and total number of VLAN pairs.
Outer VLAN 5 Inner VLAN 2	Outer VLAN ID and inner VLAN ID.

Related commands

reset mld-snooping router-port

display mld-snooping static-group

Use display mld-snooping static-group to display information about static MLD snooping group entries.

Syntax

display mld-snooping static-group [ ipv6-group-address | ipv6-source-address ] * [ vlan vlan-id ] [ verbose ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

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 information about static MLD snooping group entries for all IPv6 multicast groups.

ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you do not specify an IPv6 multicast source, this command displays information about static MLD snooping group entries for all IPv6 multicast sources.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command displays information about static MLD snooping group entries for all VLANs.

verbose: Displays detailed information. If you do not specify this keyword, the command displays brief information.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays information about static MLD snooping group entries for the MPU.

Examples

# Display detailed information about static MLD snooping group entries for VLAN 2.

<Sysname> display mld-snooping static-group vlan 2 verbose

Total 1 entries.

VLAN 2: Total 1 entries.

(::,FF1E::101)

Attribute: local port

FSM information: dummy

Host slots (0 in total):

Host ports (1 in total):

GE0/0/2

Table 10 Command output

Field	Description
Total 1 entries	Total number of static MLD snooping group entries.
VLAN 2: Total 1 entries	Total number of static MLD snooping group entries in VLAN 2.
(::, FF1E::101)	(S, G) entry, where a double colon (::) in the S position means all IPv6 multicast sources.
Attribute	Entry attribute: · global port—The entry has a global port. · local port—The entry has a port that resides on the card for which the information is displayed. · slot—The entry has ports that reside on other cards, but not on the card for which the information is displayed.
FSM information	Finite state machine information of the entry: · delete—The entry attributes have been deleted. · dummy—The entry is a new temporary entry. · no info—The entry does not exist. · normal—The entry is a correct entry.
Host slots (0 in total)	Slot numbers and total number of the cards that have member ports, except for the specified card or the MPU when no card is specified.
Host ports (1 in total)	Member ports and total number of member ports.

display mld-snooping static-router-port

Use display mld-snooping static-router-port to display static router port information.

Syntax

display mld-snooping static-router-port [ vlan vlan-id ] [ verbose ] [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094.

verbose: Displays detailed information about static router ports. If you do not specify this keyword, the command displays brief information about static router ports.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command displays static router port information for the MPU.

Examples

# Display brief information about static router ports for VLAN 2.

<Sysname> display mld-snooping static-router-port vlan 2

VLAN 2:

Router ports (2 in total):

GE0/0/1

GE0/0/2

# Display detailed information about static router ports for VLAN 2.

<Sysname> display mld-snooping static-router-port vlan 2 verbose

VLAN 2:

Router slots (0 in total):

Router ports (2 in total):

GE0/0/1

GE0/0/2

Table 11 Command output

Field	Description
VLAN 2	VLAN ID.
Router slots (0 in total)	Slot numbers and total number of the cards that have static router ports, except for the specified card or the MPU when no card is specified.
Router ports (2 in total)	Static router ports and total number of static router ports.

display mld-snooping statistics

Use display mld-snooping statistics to display statistics for the MLD messages and IPv6 PIM hello messages learned through MLD snooping.

Syntax

display mld-snooping statistics

Views

Any view

Predefined user roles

network-admin

network-operator

Examples

# Display statistics for the MLD messages and IPv6 PIM hello messages learned through MLD snooping.

<Sysname> display mld-snooping statistics

Received MLD messages:

MLD general queries: 19

M-LAG: 19

MLDv1 specific queries: 0

M-LAG: 0

MLDv2 specific queries: 0

M-LAG: 0

MLDv2 specific sg queries: 0

M-LAG: 0

MLDv1 reports: 19

M-LAG: 19

MLDv2 reports: 0

M-LAG: 0

MLDv2 reports with right and wrong records: 0

M-LAG: 0

MLD dones: 5

M-LAG: 5

Error MLD messages: 1

M-LAG: 1

Sent MLD messages:

MLDv1 specific queries: 0

MLDv2 specific queries: 0

MLDv2 specific sg queries: 0

Received IPv6 PIM hello: 0

Table 12 Command output

Field	Description
general queries	Number of MLD general queries.
specific queries	Number of MLD multicast-address-specific queries.
reports	Number of MLD reports.
dones	Number of MLD done messages.
reports with right and wrong records	Number of MLD reports with correct and incorrect records.
specific sg queries	Number of MLD multicast-address-and-source-specific queries.
Received IPv6 PIM hello	Number of received IPv6 PIM hello messages.
error MLD messages	Number of MLD messages with errors.
M-LAG	Number of IGMP messages received on the M-LAG peer-link interface.

Related commands

reset mld-snooping statistics

dot1p-priority (MLD-snooping view)

Use dot1p-priority to set the 802.1p priority for MLD messages globally.

Use undo dot1p-priority to restore the default.

Syntax

dot1p-priority priority

undo dot1p-priority

Default

The default setting varies by device model.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

priority: Specifies an 802.1p priority for MLD messages, in the range of 0 to 7. The greater the value, the higher the priority.

Usage guidelines

You can set the 802.1p priority globally for all VLANs in MLD-snooping view or for a VLAN in VLAN view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

Examples

# Set the 802.1p priority for MLD messages to 3 globally.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] dot1p-priority 3

Related commands

mld-snooping dot1p-priority

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-snooping 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-snooping

[Sysname-mld-snooping] dscp 63

enable (MLD-snooping view)

Use enable to enable MLD snooping for VLANs.

Use undo enable to disable MLD snooping for VLANs.

Syntax

enable vlan vlan-list

undo enable vlan vlan-list

Default

The MLD snooping status in a VLAN is consistent with the global MLD snooping status.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

Usage guidelines

You must enable the MLD snooping feature by using the mld-snooping command before you enable MLD snooping for VLANs.

You can enable MLD snooping for multiple VLANs by using this command in MLD-snooping view or for a VLAN by using the mld-snooping enable command in VLAN view. The configuration in VLAN view has the same priority as the configuration in MLD-snooping view, and the most recent configuration takes effect.

Examples

# Enable the MLD snooping feature, and then enable MLD snooping for VLAN 2 through VLAN 10.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] enable vlan 2 to 10

Related commands

mld-snooping

mld-snooping enable

entry-limit (MLD-snooping view)

Use entry-limit to globally set the maximum number of MLD snooping forwarding entries, including dynamic entries and static entries.

Use undo entry-limit to restore the default.

Syntax

entry-limit limit

undo entry-limit

Default

The maximum number of MLD snooping forwarding entries is 4294967295.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

limit: Specifies the maximum number of MLD snooping forwarding entries, in the range of 0 to 4294967295.

Examples

# Set the global maximum number of MLD snooping forwarding entries to 512.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] entry-limit 512

fast-leave (MLD-snooping view)

Use fast-leave to enable fast-leave processing globally.

Use undo fast-leave to disable fast-leave processing globally.

Syntax

fast-leave [ vlan vlan-list ]

undo fast-leave [ vlan vlan-list ]

Default

Fast-leave processing is disabled.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

vlan vlan-list: Specifies a space-separated list of up to 10 VLAN items. Each item specifies a VLAN by its ID or a range of VLANs in the form of start-vlan-id to end-vlan-id. The VLAN ID is in the range of 1 to 4094. If you do not specify a VLAN, this command takes effect for all VLANs.

Usage guidelines

The fast-leave processing feature enables the device to immediately remove a port from the forwarding entry for an IPv6 multicast group when the port receives a done message.

You can enable fast-leave processing globally for all ports in MLD-snooping view or for a port in interface view. For a port, the port-specific configuration takes priority over the global configuration.

Examples

# Globally enable MLD snooping fast-leave processing for VLAN 2.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] fast-leave vlan 2

Related commands

mld-snooping fast-leave

global-enable (MLD-snooping view)

Use global-enable to enable MLD snooping globally.

Use undo global-enable to disable MLD snooping globally.

Syntax

global-enable

undo global-enable

Default

MLD snooping is disabled globally.

Views

MLD-snooping view

Predefined user roles

network-admin

Usage guidelines

To configure other MLD snooping features for VLANs, you must enable MLD snooping for the specific VLANs even though MLD snooping is enabled globally.

Examples

# Enable MLD snooping globally.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] global-enable

Related commands

enable (MLD-snooping view)

mld-snooping

mld-snooping disable

mld-snooping enable

group-policy (MLD-snooping view)

Use group-policy to globally configure an IPv6 multicast group policy to control the IPv6 multicast groups that hosts can join.

Use undo group-policy to globally delete IPv6 multicast group policies.

Syntax

group-policy ipv6-acl-number [ vlan vlan-list ]

undo group-policy [ vlan vlan-list ]

Default

No IPv6 multicast group policies exist. Hosts can join any IPv6 multicast groups.

Views

MLD-snooping 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. Hosts can join only IPv6 multicast groups that the ACL permits. If the ACL does not exist or does not have valid rules, hosts cannot join IPv6 multicast groups.

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 ports, because static member ports do not send MLD reports.

You can configure an IPv6 multicast group policy globally for all ports in MLD-snooping view or for a port in interface view. For a port, the port-specific configuration takes priority over the global configuration.

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

· An 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.

· 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 MLDv1 reports and MLDv2 IS_EX and MLDv2 TO_EX reports that do not carry IPv6 multicast source addresses, set the source source-address source-prefix option to 0::0.

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

You can configure different ACLs for all ports in different VLANs. If you configure multiple ACLs for all ports in the same VLAN, the most recent configuration takes effect.

Examples

# Configure an IPv6 multicast group policy for VLAN 2 so that hosts in VLAN 2 can join only 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] mld-snooping

[Sysname-mld-snooping] group-policy 2000 vlan 2

Related commands

mld-snooping group-policy

host-aging-time (MLD-snooping view)

Use host-aging-time to set the aging timer for dynamic member ports globally.

Use undo host-aging-time to restore the default.

Syntax

host-aging-time seconds

undo host-aging-time

Default

The aging timer for dynamic member ports is 260 seconds.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

seconds: Specifies an aging timer for dynamic member ports, in the range of 1 to 8097894 seconds.

Usage guidelines

You can set the timer globally for all VLANs in MLD-snooping view or for a VLAN in VLAN view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

To avoid mistakenly deleting IPv6 multicast group members, set the aging timer for dynamic member ports to be greater than the value calculated by using the following formula:

[ MLD general query interval ] + [ maximum response time for MLD general queries ]

As a best practice, set the aging timer of dynamic member ports to the value calculated by using the following formula:

[ MLD general query interval ] × 2 + [ maximum response time for MLD general queries ]

Examples

# Set the global aging timer for dynamic member ports to 300 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] host-aging-time 300

Related commands

mld-snooping host-aging-time

host-tracking (MLD-snooping view)

Use host-tracking to enable host tracking globally.

Use undo host-tracking to disable host tracking globally.

Syntax

host-tracking

undo host-tracking

Default

Host tracking is disabled.

Views

MLD-snooping view

Predefined user roles

network-admin

Usage guidelines

You can enable host tracking globally for all VLANs in MLD-snooping view or for a VLAN in VLAN view. For a VLAN, the global configuration has the same priority as the VLAN-specific configuration.

Examples

# Enable host tracking globally.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] host-tracking

Related commands

display mld-snooping host-tracking

mld-snooping host-tracking

last-listener-query-interval (MLD-snooping 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-snooping 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 interval for a VLAN in VLAN view or globally for all VLANs in MLD-snooping view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

Examples

# Set the global MLD last listener query interval to 3 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] last-listener-query-interval 3

Related commands

mld-snooping last-listener-query-interval

max-response-time (MLD-snooping 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 seconds

undo max-response-time

Default

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

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

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

Usage guidelines

You can set the time globally for all VLANs in MLD-snooping view or for a VLAN in VLAN view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

To avoid mistakenly deleting IPv6 multicast group members, set the maximum response time for MLD general queries to be less than the MLD general query interval.

Examples

# Set the global maximum response time for MLD general queries to 5 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] max-response-time 5

Related commands

mld-snooping max-response-time

mld-snooping query-interval

mld-snooping

Use mld-snooping to enable the MLD snooping feature and enter MLD-snooping view.

Use undo mld-snooping to disable the MLD snooping feature.

Syntax

mld-snooping

undo mld-snooping

Default

The MLD snooping feature is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

If you disable the MLD snooping feature, MLD snooping is disabled in all VLANs.

Examples

# Enable the MLD snooping feature and enter MLD-snooping view.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping]

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping disable

mld-snooping done source-ip

Use mld-snooping done source-ip to configure the source IPv6 address for MLD done messages.

Use undo mld-snooping done source-ip to restore the default.

Syntax

mld-snooping done source-ip ipv6-address

undo mld-snooping done source-ip

Default

In a VLAN, the source IPv6 address of MLD done messages is the IPv6 link-local address of the current VLAN interface. If the current VLAN interface does not have an IPv6 link-local address, the source IPv6 address is FE80::02FF:FFFF:FE00:0001.

Views

VLAN view

Predefined user roles

network-admin

Parameters

ipv6-address: Specifies the source IPv6 address for MLD done messages.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

Examples

# In VLAN 2, enable MLD snooping, and specify FE80:0:0:1::1 as the source IPv6 address of MLD done messages.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping done source-ip fe80:0:0:1::1

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping dot1p-priority

Use mld-snooping dot1p-priority to set the 802.1p priority for MLD messages in a VLAN.

Use undo mld-snooping dot1p-priority to restore the default.

Syntax

mld-snooping dot1p-priority priority

undo mld-snooping dot1p-priority

Default

The default setting varies by device model.

Views

VLAN view

Predefined user roles

network-admin

Parameters

priority: Specifies an 802.1p priority for MLD messages, in the range of 0 to 7. The greater the value, the higher the priority.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

You can set the 802.1p priority for a VLAN in VLAN view or globally for all VLANs in MLD-snooping view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

Examples

# In VLAN 2, enable MLD snooping, and set the 802.1p priority for MLD messages to 3.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping dot1p-priority 3

Related commands

dot1p-priority (MLD-snooping view)

enable (MLD-snooping view)

mld-snooping enable

mld-snooping drop-unknown

Use mld-snooping drop-unknown to enable dropping unknown IPv6 multicast data packets for a VLAN.

Use undo mld-snooping drop-unknown to disable dropping unknown IPv6 multicast data packets for a VLAN.

Syntax

mld-snooping drop-unknown

undo mld-snooping drop-unknown

Default

Dropping unknown IPv6 multicast data packets is disabled. Unknown IPv6 multicast data packets are flooded.

Views

VLAN view

Predefined user roles

network-admin

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

Examples

# In VLAN 2, enable MLD snooping, and enable dropping unknown IPv6 multicast data packets.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping drop-unknown

# In VSI aaa, enable MLD snooping, and enable dropping unknown IPv6 multicast data packets.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vsi aaa

[Sysname-vsi-aaa] mld-snooping enable

[Sysname-vsi-aaa] mld-snooping drop-unknown

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping { disable | enable }

Use mld-snooping enable to enable MLD snooping for a VLAN.

Use mld-snooping disable to disable MLD snooping for a VLAN.

Use undo mld-snooping to restore the MLD snooping status in a VLAN or VSI to the global MLD snooping status.

Syntax

mld-snooping { disable | enable }

undo mld-snooping

Default

The MLD snooping status in a VLAN is consistent with the global MLD snooping status.

Views

VLAN view

Predefined user roles

network-admin

Usage guidelines

You must enable the MLD snooping feature by using the mld-snooping command before you enable MLD snooping for a VLAN.

You can enable MLD snooping for a VLAN by using this command in VLAN view or for multiple VLANs by using the enable command. The configuration in VLAN view has the same priority as the configuration in MLD-snooping view, and the most recent configuration takes effect.

Examples

# Enable the MLD snooping feature, and then enable MLD snooping for VLAN 2.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

# Disable MLD snooping for VLAN 2.

<Sysname> system-view

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping disable

Related commands

enable (MLD-snooping view)

mld-snooping

mld-snooping fast-leave

Use mld-snooping fast-leave to enable fast-leave processing on a port.

Use undo mld-snooping fast-leave to disable fast-leave processing on a port.

Syntax

mld-snooping fast-leave [ vlan vlan-list ]

undo mld-snooping fast-leave [ vlan vlan-list ]

Default

Fast-leave processing is disabled on a port.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

Usage guidelines

The fast-leave processing feature enables the device to immediately remove a port from the forwarding entry for an IPv6 multicast group when the port receives a done message.

You can enable fast-leave processing for a port in interface view or globally for all ports in MLD-snooping view. For a port, the port-specific configuration takes priority over the global configuration.

Examples

# Enable fast-leave processing for VLAN 2 on GigabitEthernet 0/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping fast-leave vlan 2

Related commands

fast-leave (MLD-snooping view)

mld-snooping general-query source-ip

Use mld-snooping general-query source-ip to configure the source IPv6 address for MLD general queries.

Use undo mld-snooping general-query source-ip to restore the default.

Syntax

mld-snooping general-query source-ip ipv6-address

undo mld-snooping general-query source-ip

Default

In a VLAN, the source IPv6 address for MLD general queries is the IPv6 link-local address of the current VLAN interface. If the current VLAN interface does not have an IPv6 link-local address, the source IPv6 address is FE80::02FF:FFFF:FE00:0001.

Views

VLAN view

Predefined user roles

network-admin

Parameters

ipv6-address: Specifies the source IPv6 address for MLD general queries.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

Examples

# In VLAN 2, enable MLD snooping, and specify FE80:0:0:1::1 as the source IPv6 address for MLD general queries.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping general-query source-ip fe80:0:0:1::1

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping group-limit

Use mld-snooping group-limit to set the maximum number of IPv6 multicast groups that a port can join.

Use undo mld-snooping group-limit to remove the limit on the maximum number of IPv6 multicast groups that a port can join.

Syntax

mld-snooping group-limit limit [ vlan vlan-list ]

undo mld-snooping group-limit [ vlan vlan-list ]

Default

No limit is placed on the maximum number of IPv6 multicast groups that a port can join.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

limit: Specifies the maximum number of multicast groups that a port can join, in the range of 0 to 4294967295.

Usage guidelines

This command takes effect only on the IPv6 multicast groups that a port joins dynamically.

Examples

# On GigabitEthernet 0/0/1, set the maximum number to 10 for IPv6 multicast groups that the port can join in VLAN 2.

<Sysname> system-view

[Sysname] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping group-limit 10 vlan 2

mld-snooping group-policy

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

Use undo mld-snooping group-policy to delete IPv6 multicast group policies on a port.

Syntax

mld-snooping group-policy ipv6-acl-number [ vlan vlan-list ]

undo mld-snooping group-policy [ vlan vlan-list ]

Default

No IPv6 multicast group policies exist. Hosts attached to the port can join any IPv6 multicast groups.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface 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. Hosts can join only the IPv6 multicast groups that the ACL permits. If the ACL does not exist or does not have valid rules, hosts cannot join IPv6 multicast groups.

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 ports, because static member ports do not send MLD reports.

You can configure an IPv6 multicast group policy for a port in interface view or globally for all ports in MLD-snooping view. For a port, the port-specific configuration takes priority over the global configuration.

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

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

To match MLDv1 reports and MLD IS_EX and MLDv2 TO_EX reports that do not carry IPv6 multicast source addresses, set the source source-address source-prefix option to 0::0.

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

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

You can configure different ACLs for different VLANs on a port. If you configure multiple ACLs for the same VLANs on a port, the most recent configuration takes effect.

Examples

# On GigabitEthernet 0/0/1, configure an IPv6 multicast group policy for VLAN 2 so that hosts attached to the port in VLAN 2 can join only the 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] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping group-policy 2000 vlan 2

Related commands

group-policy (MLD-snooping view)

mld-snooping host-aging-time

Use mld-snooping host-aging-time to set the aging timer for dynamic member ports in a VLAN.

Use undo mld-snooping host-aging-time to restore the default.

Syntax

mld-snooping host-aging-time seconds

undo mld-snooping host-aging-time

Default

The aging timer for dynamic member ports is not set in a VLAN.

Views

VLAN view

Predefined user roles

network-admin

Parameters

seconds: Specifies an aging timer for dynamic member ports, in the range of 1 to 8097894 seconds.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

You can set the timer for a VLAN in VLAN view or globally for all VLANs in MLD-snooping view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

To avoid mistakenly deleting IPv6 multicast group members, set the aging timer for dynamic member ports to be greater than the value calculated by using the following formula:

[ MLD general query interval ] + [ maximum response time for MLD general queries ]

As a best practice, set the aging timer of dynamic member ports to the value calculated by using the following formula:

[ MLD general query interval ] × 2 + [ maximum response time for MLD general queries ]

Examples

# In VLAN 2, enable MLD snooping, and set the aging timer for dynamic member ports in the VLAN to 300 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping host-aging-time 300

Related commands

enable (MLD-snooping view)

host-aging-time (MLD-snooping view)

mld-snooping enable

mld-snooping host-join

Use mld-snooping host-join to configure a port as a simulated member host for an IPv6 multicast group or an IPv6 multicast source and group.

Use undo mld-snooping host-join to remove the configuration of a simulated member host for an IPv6 multicast group.

Syntax

mld-snooping host-join ipv6-group-address [ source-ip ipv6-source-address ] vlan vlan-id

undo mld-snooping host-join { ipv6-group-address [ source-ip ipv6-source-address ] vlan vlan-id | all }

Default

A port is not a simulated member host of any IPv6 multicast groups or any IPv6 multicast sources and groups.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

source-ip ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you specify an IPv6 multicast source, this command configures the port as a simulated member host for an IPv6 multicast source and group. If you do not specify an IPv6 multicast source, this command configures the port as a simulated member host for an IPv6 multicast group. This option takes effect on MLDv2 snooping devices.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094.

all: Specifies all IPv6 multicast groups and all IPv6 multicast sources and groups.

Usage guidelines

The version of MLD running on a simulated member host is the same as the version of MLD snooping running on the port. The port ages out in the same way as a dynamic member port.

Examples

# Configure GigabitEthernet 0/0/1 as a simulated member host for the IPv6 multicast group (*, FF3E::101) in VLAN 2.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] quit

[Sysname] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping host-join ff3e::101 vlan 2

mld-snooping host-tracking

Use mld-snooping host-tracking to enable host tracking for a VLAN.

Use undo mld-snooping host-tracking to disable host tracking for a VLAN.

Syntax

mld-snooping host-tracking

undo mld-snooping host-tracking

Default

Host tracking is disabled.

Views

VLAN view

Predefined user roles

network-admin

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command for the VLAN.

You can enable host tracking for a VLAN in VLAN view or globally for all VLANs in MLD-snooping view. For a VLAN, the VLAN-specific configuration has the same priority as the global configuration.

Examples

# In VLAN 2, enable MLD snooping, and then enable host tracking.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping host-tracking

Related commands

display mld-snooping host-tracking

host-tracking (MLD-snooping view)

mld-snooping enable

mld-snooping last-listener-query-interval

Use mld-snooping last-listener-query-interval to set the MLD last listener query interval for a VLAN.

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

Syntax

mld-snooping last-listener-query-interval interval

undo mld-snooping last-listener-query-interval

Default

The MLD last listener query interval is 1 second.

Views

VLAN 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 must enable MLD snooping for a VLAN before you execute this command.

You can set the interval for a VLAN in VLAN view or globally for all VLANs in MLD-snooping view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

Examples

# In VLAN 2, enable MLD snooping, and set the MLD last listener query interval to 3 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping last-listener-query-interval 3

Related commands

enable (MLD-snooping view)

last-listener-query-interval (MLD-snooping view)

mld-snooping enable

mld-snooping max-response-time

Use mld-snooping max-response-time to set the maximum response time for MLD general queries in a VLAN.

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

Syntax

mld-snooping max-response-time seconds

undo mld-snooping max-response-time

Default

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

Views

VLAN view

Predefined user roles

network-admin

Parameters

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

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

You can set the time for a VLAN in VLAN view or globally for all VLANs in MLD-snooping view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

To avoid mistakenly deleting IPv6 multicast group members, set the maximum response time for MLD general queries to be less than the MLD general query interval.

Examples

# In VLAN 2, enable MLD snooping, and set the maximum response time for MLD general queries to 5 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping max-response-time 5

Related commands

enable (MLD-snooping view)

max-response-time (MLD-snooping view)

mld-snooping enable

mld-snooping query-interval

mld-snooping overflow-replace

Use mld-snooping overflow-replace to enable the IPv6 multicast group replacement feature on a port.

Use undo mld-snooping overflow-replace to disable the multicast group replacement feature on a port.

Syntax

mld-snooping overflow-replace [ vlan vlan-list ]

undo mld-snooping overflow-replace [ vlan vlan-list ]

Default

The IPv6 multicast group replacement feature is disabled.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

Usage guidelines

This command takes effect only on the IPv6 multicast groups that a port joins dynamically.

You can enable the IPv6 multicast group replacement feature for a port in interface view or globally for all ports in MLD-snooping view. For a port, the port-specific configuration takes priority over the global configuration.

Examples

# On GigabitEthernet 0/0/1, enable the IPv6 multicast group replacement feature for VLAN 2.

<Sysname> system-view

[Sysname] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping overflow-replace vlan 2

Related commands

overflow-replace (MLD-snooping view)

mld-snooping proxy enable

Use mld-snooping proxy enable to enable MLD snooping proxying for a VLAN.

Use undo mld-snooping proxy enable to disable MLD snooping proxying for a VLAN.

Syntax

mld-snooping proxy enable

undo mld-snooping proxy enable

Views

VLAN view

Predefined user roles

network-admin

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

This command does not take effect on a VLAN that is a sub-VLAN of an IPv6 multicast VLAN.

Examples

# In VLAN 2, enable MLD snooping, and enable MLD snooping proxying.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping proxy enable

Related commands

enable (MLD-snooping view)

mld-snooping enable

subvlan (IPv6 multicast-VLAN view)

mld-snooping querier

Use mld-snooping querier to enable the MLD snooping querier.

Use undo mld-snooping querier to disable the MLD snooping querier.

Syntax

mld-snooping querier

undo mld-snooping querier

Default

The MLD snooping querier is disabled.

Views

VLAN view

Predefined user roles

network-admin

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

For a sub-VLAN of an IPv6 multicast VLAN, this command takes effect only after you remove the VLAN from the IPv6 multicast VLAN.

Examples

# In VLAN 2, enable MLD snooping, and enable the MLD snooping querier.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping querier

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping querier-election

Use mld-snooping querier-election to enable MLD snooping querier election for a VLAN.

Use undo mld-snooping querier-election to disable MLD snooping querier election for a VLAN.

Syntax

mld-snooping querier-election

undo mld-snooping querier-election

Default

MLD snooping querier election is disabled.

Views

VLAN view

Predefined user roles

network-admin

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

For MLD snooping querier election to take effect, you must enable the MLD snooping querier.

Examples

# In VLAN 2, enable MLD snooping, and enable MLD snooping querier election.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping querier

[Sysname-vlan2] mld-snooping querier-election

Related commands

mld-snooping querier

mld-snooping query-interval

Use mld-snooping query-interval to set the MLD general query interval for a VLAN.

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

Syntax

mld-snooping query-interval interval

undo mld-snooping query-interval

Default

The MLD general query interval is 125 seconds.

Views

VLAN view

Predefined user roles

network-admin

Parameters

interval: Specifies an MLD general query interval, in the range of 2 to 31744 seconds.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command for the VLAN.

To avoid mistakenly deleting IPv6 multicast group members, set the MLD general query interval to be greater than the maximum response time for MLD general queries.

Examples

# In VLAN 2, enable MLD snooping, and set the MLD general query interval to 20 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping query-interval 20

Related commands

enable (MLD-snooping view)

max-response-time

mld-snooping enable

mld-snooping max-response-time

mld-snooping querier

mld-snooping report source-ip

Use mld-snooping report source-ip to configure the source IPv6 address for MLD reports.

Use undo mld-snooping report source-ip to restore the default.

Syntax

mld-snooping report source-ip ipv6-address

undo mld-snooping report source-ip

Default

In a VLAN, the source IPv6 address for MLD reports is the IPv6 link-local address of the current VLAN interface. If the current VLAN interface does not have an IPv6 link-local address, the source IPv6 address is FE80::02FF:FFFF:FE00:0001.

Views

VLAN view

Predefined user roles

network-admin

Parameters

ipv6-address: Specifies the source IPv6 address for MLD reports.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

Examples

# In VLAN 2, enable MLD snooping, and specify FE80:0:0:1::1 as the source IPv6 address for MLD reports.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping report source-ip fe80:0:0:1::1

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping router-aging-time

Use mld-snooping router-aging-time to set the aging timer for dynamic router ports in a VLAN.

Use undo mld-snooping router-aging-time to restore the default.

Syntax

mld-snooping router-aging-time seconds

undo mld-snooping router-aging-time

Default

The aging timer for dynamic router ports is 260 seconds.

Views

VLAN view

Predefined user roles

network-admin

Parameters

seconds: Specifies an aging timer for dynamic router ports, in the range of 1 to 8097894 seconds.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

You can set the timer for a VLAN in VLAN view or globally for all VLANs in MLD-snooping view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

Examples

# In VLAN 2, enable MLD snooping, and set the aging timer for dynamic router ports in the VLAN to 100 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping router-aging-time 100

Related commands

enable (MLD-snooping view)

mld-snooping enable

router-aging-time (MLD-snooping view)

mld-snooping router-port-deny

Use mld-snooping router-port-deny to disable a port from becoming a dynamic router port.

Use undo mld-snooping router-port-deny to allow a port to become a dynamic router port.

Syntax

mld-snooping router-port-deny [ vlan vlan-list ]

undo mld-snooping router-port-deny [ vlan vlan-list ]

Default

A port is allowed to become a dynamic router port.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

vlan vlan-list: Specifies a space-separated list of up to 10 VLAN items. Each item specifies a VLAN by its ID or a range of VLANs in the form of start-vlan-id to end-vlan-id. The VLAN ID is in the range of 1 to 4094. If you specify VLANs, this command takes effect only when the port belongs to the specified VLANs. If you do not specify a VLAN, this command takes effect on all VLANs.

Examples

# Disable GigabitEthernet 0/0/1 from becoming a dynamic router port in VLAN 2.

<Sysname> system-view

[Sysname] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping router-port-deny vlan 2

mld-snooping router-port-discard

Use mld-snooping router-port-discard to prevent the device from forwarding multicast data to router ports in a VLAN.

Use undo mld-snooping router-port-discard to restore the default.

Syntax

mld-snooping router-port-discard

undo mld-snooping router-port-discard

Default

The device forwards multicast data to static router ports in a VLAN.

Views

VLAN view

Predefined user roles

network-admin

Usage guidelines

If all ports on an MLD snooping Layer 2 device are statically configured as router ports, the Layer 2 device will forwards multicast data from Layer 3 multicast devices to all its router ports. This wastes bandwidth resources. Perform this task to not forward multicast data to router ports in a VLAN if they are not interested in receiving the data.

Before configuring this command, you must enable MLD snooping in the VLAN.

Examples

# Prevent the device from forwarding multicast data to router ports in a VLAN.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 10

[Sysname-vlan10] mld-snooping enable

[Sysname-vlan10] mld-snooping router-port-discard

Related commands

enable (MLD-snooping view)

mld-snooping

mld-snooping special-query source-ip

Use mld-snooping special-query source-ip to configure the source IPv6 address for MLD multicast-address-specific queries.

Use undo mld-snooping special-query source-ip to restore the default.

Syntax

mld-snooping special-query source-ip ipv6-address

undo mld-snooping special-query source-ip

Default

In a VLAN, the source IPv6 address of MLD multicast-address-specific queries is one of the following:

· The source address of MLD general queries if the MLD snooping querier of the VLAN has received MLD general queries.

· The IPv6 link-local address of the current VLAN interface if the MLD snooping querier does not receive an MLD general query.

· FE80::02FF:FFFF:FE00:0001 if the MLD snooping querier does not receive an MLD general query and the current VLAN interface does not have an IPv6 link-local address.

Views

VLAN view

Predefined user roles

network-admin

Parameters

ipv6-address: Specifies the source IPv6 address for MLD multicast-address-specific queries.

Usage guidelines

You must enable MLD snooping for a VLAN before you execute this command.

Examples

# In VLAN 2, enable MLD snooping, and specify FE80:0:0:1::1 as the source IPv6 address of MLD multicast-address-specific queries.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping special-query source-ip fe80:0:0:1::1

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping static-group

Use mld-snooping static-group to configure a port as a static member port of an IPv6 multicast group or an IPv6 multicast source and group.

Use undo mld-snooping static-group to delete the configuration of static member ports.

Syntax

mld-snooping static-group ipv6-group-address [ source-ip ipv6-source-address ] vlan vlan-id

undo mld-snooping static-group { ipv6-group-address [ source-ip ipv6-source-address ] vlan vlan-id | all }

Default

A port is not a static member port of IPv6 multicast groups.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

source-ip ipv6-source-address: Specifies an IPv6 multicast source by its IPv6 address. If you specify an IPv6 multicast source, this command configures the port as a static member port of an IPv6 multicast source and group. If you do not specify an IPv6 multicast source, this command configures the port as a static member port of an IPv6 multicast group. This option takes effect on MLDv2 snooping devices.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094.

all: Specifies all IPv6 multicast groups and all IPv6 multicast sources and groups.

Examples

# Configure GigabitEthernet 0/0/1 as a static member port for the IPv6 multicast group (*, FF3E::101) in VLAN 2.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] quit

[Sysname] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping static-group ff3e::101 vlan 2

mld-snooping static-router-port

Use mld-snooping static-router-port to configure a port as a static router port.

Use undo mld-snooping static-router-port to remove the configuration of static router ports.

Syntax

mld-snooping static-router-port vlan vlan-id

undo mld-snooping static-router-port { all | vlan vlan-id }

Default

A port is not a static router port.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Predefined user roles

network-admin

Parameters

all: Specifies all VLANs.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094.

Examples

# Configure GigabitEthernet 0/0/1 as a static router port in VLAN 2.

<Sysname> system-view

[Sysname] interface gigabitethernet 0/0/1

[Sysname-GigabitEthernet0/0/1] mld-snooping static-router-port vlan 2

mld-snooping triggered-query enable

Use mld-snooping triggered-query enable to enable the device to send MLD general queries upon a port state change.

Use undo mld-snooping triggered-query enable to restore the default.

Syntax

mld-snooping triggered-query enable { port-down | port-up } *

undo mld-snooping triggered-query enable [ port-down | port-up ] *

Default

The device does not send MLD general queries upon a port state change.

Views

VLAN view

Predefined user roles

network-admin

Parameters

port-down: Enables the device to send MLD general queries when a port changes to the down state.

port-up: Enables the device to send MLD general queries when a port changes to the up state.

Usage guidelines

The receiver side's devices connect to the Layer 2 multicast device through a Reth interface for high availability. The Reth interface has two member interfaces. Multicast data is sent to the receivers through the active member interface. When active member interface fails, the Layer 2 multicast device does not send an MLD general query immediately and cannot update the other member interface to multicast forwarding entries. For more information about Reth interfaces, see High Availability Configuration Guide.

This command enables the device to immediately send an MLD general query to all ports in the affected VLAN when the state of a port changes. This command ensures that the device can update the member port information in multicast forwarding entries and switch multicast traffic to the new link promptly.

If you do not specify any keyword when executing the undo form this command, the device does not sends an MLD general query no matter whether a port changes to the down or up state.

Examples

# Enables the device to send MLD general queries when the state of a port changes.

<Sysname> system-view

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping triggered-query enable port-down port-up

mld-snooping version

Use mld-snooping version to specify an MLD snooping version for a VLAN.

Use undo mld-snooping version to restore the default.

Syntax

mld-snooping version version-number

undo mld-snooping version

Default

The MLD snooping version in a VLAN is 1.

Views

VLAN view

Predefined user roles

network-admin

Parameters

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

Usage guidelines

You must enable MLD snooping for a VLAN before you configure this command.

You can specify the version for a VLAN in VLAN view or for the specified VLANs in MLD-snooping view. The VLAN-specific configuration has the same priority as the configuration in MLD-snooping view, and the most recent configuration takes effect.

Examples

# In VLAN 2, enable MLD snooping, and specify MLD snooping version 2.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] quit

[Sysname] vlan 2

[Sysname-vlan2] mld-snooping enable

[Sysname-vlan2] mld-snooping version 2

Related commands

enable (MLD-snooping view)

mld-snooping enable

version (MLD-snooping view)

overflow-replace (MLD-snooping view)

Use overflow-replace to enable the IPv6 multicast group replacement feature globally.

Use undo overflow-replace to disable the IPv6 multicast group replacement feature globally.

Syntax

overflow-replace [ vlan vlan-list ]

undo overflow-replace [ vlan vlan-list ]

Default

The IPv6 multicast group replacement feature is disabled.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

Usage guidelines

This command takes effect only on the IPv6 multicast groups that a port joins dynamically.

You can enable IPv6 multicast group replacement globally for all ports in MLD-snooping view or for a port in interface view. For a port, the port-specific configuration takes priority over the global configuration.

Examples

# Globally enable the IPv6 multicast group replacement feature for VLAN 2.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] overflow-replace vlan 2

Related commands

mld-snooping overflow-replace

report-aggregation (MLD-snooping view)

Use report-aggregation to enable MLD report suppression.

Use undo report-aggregation to disable MLD report suppression.

Syntax

report-aggregation

undo report-aggregation

Default

MLD report suppression is enabled.

Views

MLD-snooping view

Predefined user roles

network-admin

Examples

# Disable MLD report suppression.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] undo report-aggregation

reset ipv6 l2-multicast fast-forwarding cache

Use reset ipv6 l2-multicast fast-forwarding cache to clear Layer 2 IPv6 multicast fast forwarding entries.

Syntax

reset ipv6 l2-multicast fast-forwarding cache [ vlan vlan-id ] { { ipv6-source-address | ipv6-group-address } * | all } [ slot slot-number ]

Views

Any view

Predefined user roles

network-admin

Parameters

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094.

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

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command clears Layer 2 IPv6 multicast fast forwarding entries for the MPU.

all: Specifies all Layer 2 IPv6 multicast fast forwarding entries.

Examples

# Clear all Layer 2 IPv6 multicast fast forwarding entries.

<Sysname> reset ipv6 l2-multicast fast-forwarding cache all

# Clear the Layer 2 IPv6 multicast fast forwarding entry for the IPv6 group (*, FF1E::2).

<Sysname> reset ipv6 l2-multicast fast-forwarding cache FF1E::2

Related commands

display ipv6 l2-multicast fast-forwarding cache

reset mld-snooping group

Use reset mld-snooping group to clear information about dynamic MLD snooping group entries.

Syntax

reset mld-snooping group { ipv6-group-address [ ipv6-source-address ] | all } [ vlan vlan-id | vsi vsi-name ]

Views

User view

Predefined user roles

network-admin

Parameters

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

all: Specifies all IPv6 multicast groups.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command clears information about dynamic MLD snooping group entries for all VLANs.

Examples

# Clear information about all dynamic MLD snooping group entries.

<Sysname> reset mld-snooping group all

Related commands

display mld-snooping group

reset mld-snooping router-port

Use reset mld-snooping router-port to clear dynamic router port information.

Syntax

reset mld-snooping router-port { all | vlan vlan-id }

Views

User view

Predefined user roles

network-admin

Parameters

all: Specifies all dynamic router ports.

vlan vlan-id: Specifies a VLAN by its VLAN ID in the range of 1 to 4094. If you do not specify a VLAN, this command clears dynamic router port information for all VLANs.

Examples

# Clear information about all dynamic router ports.

<Sysname> reset mld-snooping router-port all

Related commands

display mld-snooping router-port

reset mld-snooping statistics

Use reset mld-snooping statistics to clear statistics for MLD messages and IPv6 PIM hello messages learned through MLD snooping.

Syntax

reset mld-snooping statistics

Views

User view

Predefined user roles

network-admin

Examples

# Clear statistics for all MLD messages and IPv6 PIM hello messages learned through MLD snooping.

<Sysname> reset mld-snooping statistics

Related commands

display mld-snooping statistics

router-aging-time (MLD-snooping view)

Use router-aging-time to set the aging timer for dynamic router ports globally.

Use undo router-aging-time to restore the default.

Syntax

router-aging-time seconds

undo router-aging-time

Default

The aging timer for dynamic router ports is 260 seconds.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

seconds: Specifies an aging timer for dynamic router ports, in the range of 1 to 8097894 seconds.

Usage guidelines

You can set the timer globally for all VLANs in MLD-snooping view or for a VLAN in VLAN view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.

Examples

# Set the global aging timer for dynamic router ports to 100 seconds.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] router-aging-time 100

Related commands

mld-snooping router-aging-time

send-query enable

Use send-query enable to enable the device to send MLD general queries upon a path change.

Use undo send-query enable to restore the default.

Syntax

send-query enable

undo send-query enable

Default

The device does not send MLD general queries upon a path change.

Views

MLD-snooping view

Predefined user roles

network-admin

Usage guidelines

Use this command to enable the device to immediately send an MLD general query to all ports in the affected VLAN or VSI when the path changes. This feature ensures that the device can update the member port information in IPv6 multicast forwarding entries and switch IPv6 multicast traffic to the new path promptly.

Examples

# Enable the device to send MLD general queries upon a path change.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] send-query enable

Related commands

mld-snooping

version (MLD-snooping view)

Use version to specify an MLD snooping version for VLANs.

Use undo version to restore the default.

Syntax

version version-number vlan vlan-list

undo version vlan vlan-list

Default

The MLD snooping version in a VLAN is 1.

Views

MLD-snooping view

Predefined user roles

network-admin

Parameters

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

Usage guidelines

You must enable MLD snooping for the specified VLANs before you execute this command.

You can specify the version for the specified VLANs in MLD-snooping view or for a VLAN in VLAN view. The VLAN-specific configuration has the same priority as the configuration in MLD-snooping view, and the most recent configuration takes effect.

Examples

# Enable MLD snooping for VLAN 2 through VLAN 10, and specify MLD snooping version 2 for these VLANs.

<Sysname> system-view

[Sysname] mld-snooping

[Sysname-mld-snooping] enable vlan 2 to 10

[Sysname-mld-snooping] version 2 vlan 2 to 10

Related commands

enable (MLD-snooping view)

mld-snooping enable

mld-snooping version

09-Multicast Command Reference

MLD snooping commands

display mld-snooping host-tracking

dot1p-priority (MLD-snooping view)

global-enable (MLD-snooping view)

mld-snooping

mld-snooping last-listener-query-interval

mld-snooping max-response-time

send-query enable

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