When IGMP Snooping is enabled on the switch, this command displays the following information: IGMP Snooping status, aging time of the router port, query response timeout time, and aging time of multicast member ports.

Related command: igmp-snooping.

Example

# Display IGMP Snooping configuration information on the switch.

<H3C> display igmp-snooping configuration

Enable IGMP-Snooping.

The router port timeout is 105 second(s).

The max response timeout is 1 second(s).

The host port timeout is 260 second(s).

The above-mentioned information shows: IGMP Snooping is enabled, the aging time of the router port is 105 seconds, the query response timeout time is one second, and the aging time of multicast member ports is 260 seconds.

1.1.2 display igmp-snooping group

Syntax

display igmp-snooping group [ vlan vlan-id ]

View

Any view

Parameter

vlan-id: VLAN under which the multicast group information is to be displayed. If you do not provide this argument, this command displays the multicast group information of all VLANs.

Description

Use the display igmp-snooping group command to display information about the IP and MAC multicast groups under the specified VLAN (with vlan vlan-id) or all VLANs (without vlan vlan-id).

This command displays the following information: VLAN ID, router port, IP multicast group address, member ports included in the IP multicast group, MAC multicast group, MAC multicast group address, and member ports included in the MAC multicast group.

Example

# Display information about the multicast groups under VLAN 2.

<H3C> display igmp-snooping group vlan 2

Vlan(id):2.

Total 1 IP Group(s).

Total 1 MAC Group(s).

Router port(s):Ethernet1/0/1

IP group(s):the following ip group(s) match to one mac group.

IP group address:230.45.45.1

Host

The information above means:

l Multicast groups exist in VLAN 2.

l The router port is Ethernet1/0/1.

l The address of the IP multicast group is 230.45.45.1.

1.1.3 display igmp-snooping statistics

Syntax

display igmp-snooping statistics

View

Any view

Parameter

None

Description

Use the display igmp-snooping statistics command to display IGMP Snooping statistics.

This command displays the following information: the numbers of the IGMP general query packets, IGMP group-specific query packets, IGMPv1 report packets, IGMPv2 report packets, IGMP leave packets and error IGMP packets received, and the number of the IGMP group-specific query packets sent.

Related command: igmp-snooping.

Example

# Display IGMP Snooping statistics.

<H3C> display igmp-snooping statistics

Received IGMP general query packet(s) number:0.

Received IGMP specific query packet(s) number:0.

Received IGMP V1 report packet(s) number:0.

Received IGMP V2 report packet(s) number:0.

Received IGMP leave packet(s) number:0.

Received error IGMP packet(s) number:0.

Sent IGMP specific query packet(s) number:0.

The information above shows that IGMP receives:

l zero IGMP general query packets

l zero IGMP specific query packets

l zero IGMPv1 report packets

l zero IGMPv2 report packets

l zero IGMP leave packets

l zero IGMP error packets

IGMP Snooping sends:

l zero IGMP specific query packets

1.1.4 igmp-snooping

Syntax

igmp-snooping { enable | disable }

View

System view

Parameter

enable: Enables the IGMP Snooping feature.

disable: Disables the IGMP Snooping feature.

Description

Use the igmp-snooping enable command to enable the IGMP Snooping feature.

Use the igmp-snooping disable command to disable the IGMP Snooping feature.

By default, the IGMP Snooping feature is disabled.

Example

# Enable the IGMP Snooping feature on the switch.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping enable

Enable IGMP-Snooping ok.

1.1.5 igmp-snooping fast-leave

Syntax

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

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

View

System view, Ethernet port view

Parameter

vlan-list: List of VLANs. You can specify multiple VLANs by providing this argument in the form of vlan-list = { vlan-id [ to vlan-id ] } & < 1-10 >, where vlan-id is the ID of the VLAN, in the range of 1 to 4,094 and & < 1-10 > means that you can provide up to 10 VLANs/VLAN ranges for this argument.

Description

Use the igmp-snooping fast-leave command to enable IGMP fast leave processing.

Use the undo igmp-snooping fast-leave command to cancel the configuration.

By default, IGMP fast leave processing is disabled.

Normally, upon receipt of an IGMP Leave message, Switch does not immediately remove the port from the multicast group, but sends a group-specific query message. If no response is received in a given period, it then removes the port from the multicast group.

After this command is executed, upon receipt of an IGMP Leave packet, Switch removes the port from the multicast group directly. When the port is connected to only one user, enabling IGMP fast leave processing can save bandwidth.

& Note:

l This feature is effective for IGMPv2-enabled clients only.

l When this feature is enabled, if one of the multiple users on a port leaves, the multicast services for the other users in the same multicast group may be interrupted.

Example

# Enable IGMP fast leave processing on Ethernet1/0/1.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] igmp-snooping fast-leave

1.1.6 igmp-snooping general-query source-ip

Syntax

igmp-snooping general-query source-ip { current-interface | ip-address }

undo igmp-snooping general-query source-ip

View

VLAN view

Parameter

current-interface: Specifies the current interface whose IP address is selected by the Layer 2 multicast switch.

ip-address: Source IP address of the general query packet that the Layer 2 multicast switch sends.

Description

Use the igmp-snooping general-query source-ip current-interface command to configure the Layer 2 multicast switch to use the IP address of the current VLAN interface as the source IP address of the general query packets that the Layer 2 multicast switch sends. If no IP address is configured on the current VLAN interface, the default IP address 0.0.0.0. is used as the default source IP address.

Use the igmp-snooping general-query source-ip ip-address command to configure the Layer 2 multicast switch to use the specified IP address as the source IP address when sending general query packets.

Use the undo igmp-snooping general-query source-ip command to configure the Layer 2 multicast switch to use the default IP address as the source address when sending general query packets.

These commands are effective after the IGMP Snooping querier is enabled on the switch; otherwise, the switch cannot send general query packets.

By default, the Layer 2 multicast switch sends general query packets with the source IP address 0.0.0.0.

Example

# Configure the Layer 2 multicast switch to send general query packets with the source IP address 2.2.2.2 in VLAN 3.

<H3C> system-view

System view, return to user view with Ctrl+Z.

[H3C] igmp-snooping enable

[H3C] vlan 3

[H3C-vlan3] igmp-snooping enable

[H3C-vlan3] igmp-snooping querier

[H3C-vlan3] igmp-snooping general-query source-ip 2.2.2.2

1.1.7 igmp-snooping group-limit

Syntax

igmp-snooping group-limit limit [ vlan vlan-list [ overflow-replace ] ]

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

View

Ethernet port view

Parameter

limit: Maximum number of multicast groups the port can join, in the range of 1 to 256.

overflow-replace: Allows a new multicast group to replace an existing multicast group and the multicast group with the lowest IP address is replaced first.

vlan-list: List of VLANs. You can specify multiple VLANs by providing this argument in the form of vlan-list = { vlan-id [ to vlan-id ] }&<1-10>, where &<1-10> means that you can provide up to 10 VLANs/VLAN ranges for this argument. VLAN ID ranges from 1 to 4094.

Description

Use the igmp-snooping group-limit command to define the maximum number of multicast groups the port can join.

Use the undo igmp-snooping group-limit command to restore the default setting.

By default, there is no limit on the number of multicast groups the port can join.

Example

# Allow Ethernet1/0/1 to join at most 200 multicast groups.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] igmp-snooping group-limit 200

1.1.8 igmp-snooping group-policy

Syntax

igmp-snooping group-policy acl-number [ vlan vlan-list ]

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

View

System view, Ethernet port view

Parameter

acl-number: Basic ACL number, in the range of 2000 to 2999.

vlan-id: vlan-list: List of VLANs. You can specify multiple VLANs by providing this argument in the form of vlan-list = { vlan-id [ to vlan-id ] }&<1-10>, where &<1-10> means that you can provide up to 10 VLANs/VLAN ranges for this argument. VLAN ID ranges from 1 to 4094.

Description

Use the igmp-snooping group-policy command to configure an IGMP Snooping filtering ACL.

Use the undo igmp-snooping group-policy command to remove the IGMP Snooping filtering ACL.

By default, no IGMP Snooping filtering ACL is configured.

You can configure multicast filtering ACLs globally or on the switch ports connected to user ends so as to use the IGMP Snooping filter function to limit the multicast streams that the users can access. With this function, you can treat different VoD users in different ways by allowing them to access the multicast streams in different multicast groups.

In practice, when a user orders a multicast program, an IGMP host report message is generated. When the message arrives at the switch, the switch examines the multicast filtering ACL configured on the access port to determine if the port can join the corresponding multicast group or not. If yes, it adds the port to the forward port list of the multicast group; if not, it drops the IGMP host report message and does not forward the corresponding data stream to the port. In this way, you can control the multicast streams that users can access.

An ACL rule defines a multicast address or a multicast address range (for example 224.0.0.1 to 239.255.255.255) and is used to:

l Allow the port(s) to join only the multicast group(s) defined in the rule by a permit statement.

l Inhibit the port(s) from joining the multicast group(s) defined in the rule by a deny statement.

& Note:

l One port can belong to multiple VLANs. But for each VLAN on the port, you can configure only one ACL.

l If no ACL rule is configured or the port does not belong to the specified VLAN, the filter ACL you configured does not take effect on the port.

l Since most devices broadcast unknown multicast packets, this function is often used together with the unknown multicast packet drop function to prevent multicast streams from being broadcast to a filtered port as unknown multicast packets.

Example

# Configure ACL 2000 to allow users under Ethernet1/0/1 to access the multicast streams in groups 225.0.0.0 to 225.255.255.255.

l Configure ACL 2000.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] acl number 2000

[H3C-acl-basic-2000] rule permit source 225.0.0.0 0.255.255.255

[H3C-acl-basic-2000] quit

l Create VLAN 2 and add Ethernet1/0/1 to VLAN 2.

[H3C] vlan 2

[H3C-vlan2] port Ethernet 1/0/1

[H3C-vlan2] quit

l Configure ACL 2000 on Ethernet1/0/1 to allow this VLAN 2 port to join only the IGMP multicast groups defined in the rule of ACL 2000.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] igmp-snooping group-policy 2000 vlan 2

[H3C-Ethernet1/0/1] quit

# Configure ACL 2001 to allow users under Ethernet1/0/2 to access the multicast streams in any groups except groups 225.0.0.0 to 225.0.0.255.

l Configure ACL 2001.

[H3C] acl number 2001

[H3C-acl-basic-2001] rule deny source 225.0.0.0 0.0.0.255

[H3C-acl-basic-2001] rule permint source any

[H3C-acl-basic-2001] quit

l Create VLAN 2 and add Ethernet1/0/2 to VLAN 2.

[H3C] vlan 2

[H3C-vlan2] port Ethernet 1/0/2

[H3C-vlan2] quit

l Configure ACL 2001 on Ethernet1/0/2 to allow this VLAN 2 port to join any IGMP multicast groups except those defined in the deny rule of ACL 2001.

[H3C] interface Ethernet 1/0/2

[H3C-Ethernet1/0/2] igmp-snooping group-policy 2001 vlan 2

1.1.9 igmp-snooping host-aging-time

Syntax

igmp-snooping host-aging-time seconds

undo igmp-snooping host-aging-time

View

System view

Parameter

seconds: Aging time (in seconds) of multicast member ports, in the range of 200 to 1,000.

Description

Use the igmp-snooping host-aging-time command to configure the aging time of multicast member port.

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

By default, the aging time of multicast member ports is 260 seconds.

The aging time of multicast member ports determines the refresh frequency of multicast group members. In an environment where multicast group members change frequently, a relatively shorter aging time is required.

Related command: igmp-snooping.

Example

# Set the aging time of multicast member ports to 300 seconds.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping host-aging-time 300

1.1.10 igmp-snooping max-response-time

Syntax

igmp-snooping max-response-time seconds

undo igmp-snooping max-response-time

View

System view

Parameter

seconds: Query response timeout time in seconds, in the range of 1 to 25.

Description

Use the igmp-snooping max-response-time command to configure the query response timeout time.

Use the undo igmp-snooping max-response-time command to restore the default timeout time.

By default, the query response timeout time is 10 seconds.

The maximum response time you configured determines how long the switch can wait for a response to an IGMP Snooping query message.

Related command: igmp-snooping, igmp-snooping router-aging-time.

Example

# Set the query response timeout time to 15 seconds.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping max-response-time 15

1.1.11 igmp-snooping querier

Syntax

igmp-snooping querier

undo igmp-snooping querier

View

VLAN view

Parameter

None

Description

Use the igmp-snooping querier command to enable the IGMP Snooping querier feature on the current VLAN of the Layer 2 multicast switch.

Use the undo igmp-snooping querier command to disable the IGMP Snooping querier feature on the current VLAN of the Layer 2 multicast switch.

By default, the IGMP Snooping querier feature of the Layer 2 multicast switch is disabled.

Example

# Enable the IGMP Snooping feature on VLAN 3 of the Layer 2 multicast switch.

<H3C> system-view

System view, return to user view with Ctrl+Z.

[H3C] igmp-snooping enable

[H3C] vlan 3

[H3C-vlan3] igmp-snooping enable

[H3C-vlan3] igmp-snooping querier

1.1.12 igmp-snooping query-interval

Syntax

igmp-snooping query-interval seconds

undo igmp-snooping query-interval

View

VLAN view

Parameter

seconds: Interval for the Layer 2 multicast switch to send general query packets.

Description

Use the igmp-snooping query-interval command to configure the interval for the Layer 2 multicast switch to send general query packets.

Use the undo igmp-snooping query-interval command to restore the interval to the default value.

These commands are effective after the IGMP Snooping querier feature is enabled. Otherwise, the switch will not send general query packets. The configured query interval must be longer than the maximum response interval of the host,

By default, the Layer 2 multicast switch sends general query packets at the interval of 60 seconds.

Example

# Configure the Layer 2 multicast switch to send general query packets at the interval of 100 seconds on VLAN 3.

<H3C> system-view

System view, return to user view with Ctrl+Z.

[H3C] igmp-snooping enable

[H3C] vlan 3

[H3C-vlan3] igmp-snooping enable

[H3C-vlan3] igmp-snooping querier

[H3C-vlan3] igmp-snooping query-interval 100

1.1.13 igmp-snooping router-aging-time

Syntax

igmp-snooping router-aging-time seconds

undo igmp-snooping router-aging-time

View

System view

Parameter

seconds: Aging time (in seconds) of the router port, in the range of 1 to 1,000.

Description

Use the igmp-snooping router-aging-time command to configure the aging time of the IGMP Snooping router port.

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

By default, the aging time of the router port is 105 seconds.

The router port here refers to the port connecting the Layer 2 switch to the router. The Layer 2 switch receives IGMP general query messages from the router through this port. The aging time of the router port should be a value about 2.5 times of the general query interval.

Related command: igmp-snooping max-response-time, igmp-snooping.

Example

# Set the aging time of the router port to 500 seconds.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] igmp-snooping router-aging-time 500

1.1.14 reset igmp-snooping statistics

Syntax

reset igmp-snooping statistics

View

User view

Parameter

None

Description

Use the reset igmp-snooping statistics command to clear IGMP Snooping statistics.

Related command: igmp-snooping.

Example

# Clear IGMP Snooping statistics.

<H3C> reset igmp-snooping statistics

1.1.15 service-type multicast

Syntax

service-type multicast

undo service-type multicast

View

VLAN view

Parameter

None

Description

Use the service-type multicast command to set the current VLAN as a multicast VLAN.

Use the undo service-type multicast command to cancel the multicast VLAN setting.

By default, no VLAN is a multicast VLAN.

By configuring a multicast VLAN, adding the corresponding switch ports to the multicast VLAN, and enabling IGMP Snooping, you can allow users in different VLANs to share the same multicast VLAN. This saves bandwidth since multicast stream is transmitted only within the multicast VLAN, and also guarantees the security because the multicast VLAN is completely isolated from the user VLANs.

& Note:

l Isolate VLANs cannot be set as multicast VLANs.

l One port belongs to one multicast VLAN only.

l The type of ports connected to the user terminal must be hybrid.

l The multicast member port must be in the same multicast VLAN with the router port. Otherwise, the port cannot receive multicast packets.

l If a router port is added to a multicast VLAN, the router port must be configured as a trunk port or tagged hybrid port. Otherwise, all the multicast member ports in this multicast VLAN cannot receive multicast packets.

l If a multicast member port needs to receive packets forwarded by the router port that does not belong to any multicast VLAN, the multicast member port must be removed from the multicast VLAN. Otherwise, the port cannot receive multicast packets.

Example

# Configure VLAN 2 as a multicast VLAN.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] vlan 2

[H3C-vlan2] service-type multicast

Chapter 2 Common IP Multicast Configuration Commands

2.1 Common IP Multicast Configuration Commands

2.1.1 display multicast-source-deny

Syntax

display multicast-source-deny [ interface interface-type [ interface-number ] ]

View

Any view

Parameter

interface-type: Port type.

interface-number: Port number.

Description

Use the display multicast-source-deny command to display the configuration information about the multicast source port check.

When you use this command to display the information,

l If you specify neither the port type nor the port number, the multicast source port check information about all the ports on the switch is displayed.

l If you specify the port type only, the multicast source port check information about all ports of this type is displayed.

l If you specify both the port type and the port number, the multicast source port check information about the specified port is displayed.

Example

# Display the multicast source port suppression state of Ethernet1/0/1.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] display multicast-source-deny interface Ethernet 1/0/1

# Display the multicast source port suppression state of all the 100 M Ethernet ports.

[H3C] display multicast-source-deny interface Ethernet

2.1.2 multicast-source-deny

Syntax

multicast-source-deny [ interface interface-list ]

undo multicast-source-deny [ interface interface-list ]

View

System view, Ethernet port view

Parameter

interface-list: List of Ethernet ports, expressed in the form of interface-list = { interface-number [ to interface-number ] } & < 1-10 >. The interface-number argument refers to one single Ethernet port, expressed in the form of interface-number = { interface-type interface-number | interface-name }, where the interface-type argument refers to the port type, the interface-number argument refers to the port number, and the interface-name argument refers to the port name. For meanings and value ranges of interface-type, interface-number and interface-name, refer to the parameters described in the “Port Basic Configuration” module in this manual.

Description

Use the multicast-source-deny command to enable the multicast source port suppression feature.

Use the undo multicast-source-deny command to restore the default setting.

By default, the multicast source port suppression feature is disabled on all the ports.

The multicast source port suppression feature can filter multicast packets on an unauthorized multicast source port to avoid the case that the user connected to the port sets the multicast server privately.

In system view, if the interface-list argument is not specified, the multicast source port suppression feature is enabled globally (that is, the feature is enabled on all the ports of the switch); if the interface-list argument is specified, the multicast source port suppression feature is enabled on the specified ports. In Ethernet port view, the interface-list argument cannot be specified in the command and you can use the command to enable the multicast source port suppression feature on the current port only.

Example

# Enable the multicast source port suppression feature on all the ports of the switch.

<H3C>system-view

System View: return to User View with Ctrl+Z.

[H3C] multicast-source-deny

# Enable the multicast source port suppression feature on Ethernet1/0/1 through Ethernet1/0/10 and on Ethernet1/0/12.

[H3C] multicast-source-deny interface Ethernet 1/0/1 to Ethernet 1/0/10 Ethernet 1/0/12

Chapter 3 Multicast MAC Address Entry Configuration Commands

3.1 Multicast MAC Address Entry Configuration Commands

3.1.1 mac-address multicast interface

Syntax

mac-address multicast mac-address interface interface-list vlan vlan-id

undo mac-address multicast [ mac-address [ interface interface-list ] vlan vlan-id ]

View

System view

Parameter

mac-address: Multicast MAC address.

vlan-id: VLAN ID.

interface-list: Forward port list. You can specify multiple ports by providing this argument in the format of interface-list = { interface-type interface-number [ to { interface-type interface-number } ] }&<1-10>, where interface-type refers to the port type and interface-number refers to the port number. For meanings and value ranges of interface-type and interface-number, refer to the parameters described in the “Port Basic Configuration” module in this manual.

Description

Use the mac-address multicast command to add a multicast MAC address entry.

Use the undo mac-address multicast command to remove a multicast MAC address entry.

Each multicast MAC address entry contains multicast address, forward port, VLAN ID, and so on.

Related command: display mac-address multicast static.

Example

# Add a multicast MAC address entry, with multicast address 0100-5e0a-0805, forward port Ethernet1/0/1, and VLAN 1 to which the entry belongs.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] mac-address multicast 0100-5e0a-0805 interface Ethernet 1/0/1 vlan 1

3.1.2 mac-address multicast vlan

Syntax

mac-address multicast mac-address vlan vlan-id

undo mac-address multicast [ [ mac-address ] vlan vlan-id ]

View

Ethernet port view

Parameter

mac-address: Multicast MAC address.

vlan-id: VLAN ID.

Description

Use the mac-address multicast vlan command to add a multicast MAC address entry.

Use the undo mac-address multicast vlan command to remove a multicast MAC address entry.

Each multicast MAC address entry contains multicast address, VLAN ID, and so on.

Related command: display mac-address multicast static.

Example

# Add a multicast MAC address entry on Ethernet1/0/1, with multicast address 0100-1000-1000 and VLAN 1 to which the entry belongs.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet1/0/1

[H3C-Ethernet1/0/1]mac-address multicast 0100-1000-1000 vlan 1

3.1.3 display mac-address multicast static

Syntax

display mac-address multicast [ static { { { mac-address vlan vlan-id | vlan vlan-id } [ count ] } | count } ]

View

Any view

Parameter

mac-address vlan vlan-id: Displays multicast MAC address entry/entries in the specified VLAN.

count: Displays the number of MAC entries.

vlan-id: ID of the specific VLAN.

Description

Use the display mac-address multicast static command to display the multicast MAC address entry/entries manually configured on the switch.

l Executing this command with neither mac-address nor vlan vlan-id will display the information about all the multicast MAC address entries manually added on the switch, including the multicast MAC address, VLAN ID, state of the MAC address, port number and aging time.

l Executing this command with vlan vlan-id but without mac-address will display the information about all the multicast MAC address entries manually added in the specified VLAN, including the multicast MAC address, VLAN ID, state of the MAC address, port number and aging time.

l Executing this command with both mac-address and vlan vlan-id will display the information about the multicast MAC address entries manually added in the specified VLAN with the specified multicast MAC address, including the multicast MAC address, VLAN ID, state of the MAC address, port number and aging time.

l Executing this command with count will display the information about the number of multicast MAC address entries added on the switch.

Example

# Display all the multicast MAC address entries manually added in VLAN 1.

<H3C>display mac-address multicast static vlan 1

MAC ADDR VLAN ID STATE PORT INDEX AGING TIME(s)

0100-0001-0001 1 Config static Ethernet1/0/1 N/A

Ethernet1/0/2

Ethernet1/0/3

Ethernet1/0/4

--- 1 static mac address(es) found ---

Chapter 4 Unknown Multicast Drop Configuration Command

4.1 Unknown Multicast Drop Configuration Command

4.1.1 unknown-multicast drop enable

Syntax

unknown-multicast drop enable

undo unknown-multicast drop enable

View

System view

Parameter

None

Description

Use the unknown-multicast drop enable command to enable the unknown multicast drop feature on the switch.

Use the undo unknown-multicast drop enable command to disable the unknown multicast drop feature on the switch.

Example

Enable the unknown multicast drop feature.

<H3C> system-view

System view, return to user view with Ctrl+Z.

[H3C] unknown-multicast drop enable

H3C S3100-52P Ethernet Switch Command Manual-Release 1500(V1.01)

Chapter 1 IGMP Snooping Configuration Commands

Chapter 2 Common IP Multicast Configuration Commands

2.1.1 display multicast-source-deny

Chapter 3 Multicast MAC Address Entry Configuration Commands

Chapter 4 Unknown Multicast Drop Configuration Command

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