Support - 02-IGMP Snooping Configuration Commands- H3C

display igmp-snooping group [ vlan vlan-id [ group-address] ]

Any view

Parameters

vlan vlan-id: Specifies the VLAN where the multicast group to be viewed is located. When the parameter is not provided, the command will display the information about all the multicast groups on the VLAN.

group-address: Address of the multicast group, the information of which is to be displayed. If this argument is not provided, the command displays information of all the multicast groups in the specified VLAN.

Use the display igmp-snooping group command to view the IP multicast group and MAC multicast group information of a VLAN or all the VLANs on the Ethernet switch.

Examples

# Display the multicast group information of VLAN 10.

<H3C> display igmp-snooping group vlan 10

Total 1 IP Group(s).

Total 1 MAC Group(s).

Vlan(id):10.

Total 1 IP Group(s).

Total 1 MAC Group(s).

Router port(s):

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

IP group address:230.45.45.1

Host port(s):Ethernet4/1/1

MAC group(s):

MAC group address:0100-5e2d-2d01

Host port(s):Ethernet4/1/1

Table 1-2 display igmp-snooping group command output description

Field	Description
Vlan(id)	Specified VLAN ID
Router port(s)	Router port
IP group(s)	IP multicast group
IP group address	IP address of the IP multicast group
Host port(s)	Host port of the IP multicast group
MAC group(s)	MAC multicast group
MAC group address	MAC address of the MAC multicast group
Host port(s)	Host port of the MAC multicast group

1.1.4 display igmp-snooping statistics

display igmp-snooping statistics

Parameters

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

Related commands: igmp-snooping.

Examples

# Display statistics information about IGMP Snooping.

<H3C> display igmp-snooping statistics

Received IGMP general query packet(s) number:1.

Received IGMP specific query packet(s) number:2.

Received IGMP V1 report packet(s) number:2.

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

Received IGMP leave packet(s) number:3.

Received error IGMP packet(s) number:0.

Sent IGMP specific query packet(s) number:5.

Table 1-3 display igmp-snooping statistics command output description

Field	Description
Received IGMP general query packet(s) number	Number of received IGMP general queries
Received IGMP specific query packet(s) number	Number of received IGMP group-specific queries
Received IGMP V1 report packet(s) number	Number of received IGMPv1 reports
Received IGMP V2 report packet(s) number	Number of received IGMPv2 reports
Received IGMP leave packet(s) number	Number of received IGMP leave messages
Received error IGMP packet(s) number	Number of received error IGMP messages
Sent IGMP specific query packet(s) number	Number of sent IGMP group-specific queries

1.1.5 igmp-snooping

igmp-snooping { enable | disable }

System view, VLAN view

Parameters

enable: Enables IGMP Snooping.

disable: Disables IGMP Snooping;

Use the igmp-snooping enable command to enable IGMP Snooping globally or in a VLAN.

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

By default, the switch disables IGMP Snooping.

Caution:

l When configuring IGMP Snooping, first enable global IGMP Snooping in system view, and then enable IGMP Snooping in VLAN view. Otherwise the IGMP Snooping function will not take effect.

l If the VLAN VPN is enabled on a port, the IGMP Snooping feature cannot be enabled on the VLAN for the port or the IGMP feature cannot be enabled on the corresponding VLAN interface.

l If IGMP Snooping feature is enabled in a VLAN, or IGMP is enabled on the VLAN interface, you cannot add the member port on which VLAN VPN is enabled into the VLAN.

l Isolate-user-VLAN supports the IGMP-Snooping function. After IGMP-Snooping is enabled under isolate-user-VLAN, all secondary VLANs are IGMP-Snooping enabled.

l In a secondary VLAN, IGMP packets will be directly converted and processed in isolate-user-VLAN, namely all the multicast services are implemented within isolate-user-VLAN.

l Ports in secondary VLANs cannot be used as source addresses of multicast.

l If the undo igmp-snooping command is executed in system view, all IGMP Snooping configurations previously made are removed.

Examples

# Enable IGMP Snooping in system view.

<H3C> system-view

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

[H3C] igmp-snooping enable

# Enable IGMP Snooping on VLAN 10

<H3C> system-view

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

[H3C] vlan 10

[H3C-vlan10] igmp-snooping enable

1.1.6 igmp-snooping 10ge-non-flooding enable slot

Syntax

igmp-snooping 10ge-non-flooding enable slot slot-num

undo igmp-snooping 10ge-non-flooding enable slot slot-num

View

System view

Parameters

slot-num: Slot number of the interface board.

Description

Use the igmp-snooping 10ge-non-flooding enable slot command to suppress the ports on the specified interface board from flooding unknown multicast packets at Layer 2.

Use the undo igmp-snooping 10ge-non-flooding enable slot command to remove the configuration.

By default, a port floods unknown multicast traffic at Layer 2.

& Note:

Currently, this command is not supported.

Examples

# Suppress the interface board at Slot 5 from flooding unknown multicast traffic at Layer 2.

<H3C> system-view

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

[H3C] igmp-snooping 10ge-non-flooding enable slot 5

1.1.7 igmp-snooping fast-leave

Syntax

igmp-snooping fast-leave [ vlan { vlan-id [ to vlan-id ] }&<1-10> ]

undo igmp-snooping fast-leave [ vlan { vlan-id [ to vlan-id ] } &<1-10> ]

View

System view, Ethernet port view

Parameters

vlan { vlan-id [ to vlan-id ] }&<1-10>: Specifies any VLAN or VLAN scope for port you want to enable/disable the IGMP Snooping fast leave feature on. The vlan-id argument ranges from 1 to 4094.

Description

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

Use the undo igmp-snooping fast-leave command to disable IGMP Snooping fast leave.

You can optionally specify multiple VLANs in the igmp-snooping fast-leave command, through which you can enable IGMP Snooping fast leave in the corresponding VLANs. If you do not specify any VLAN, IGMP Snooping fast leave is enabled in all VLANs.

& Note:

l Fast leaves that are configured in system view and Ethernet port view operate separately.

l Fast leave works on all ports of the specified VLANs if you configure it in system view. However, it only works on the current port (e.g., a port operates as a trunk of multiple VLANs) in the specified VLANs if you configure it in Ethernet port view.

Caution:

l Fast leave configured for a port takes effect only when the VLAN it belongs to is IGMP Snooping-enabled.

l Fast leave does not work if the corresponding specified VLANs do not exist, the port does not belongs to any of the specified VLANs, or the VLANs do not have IGMP Snooping enabled.

l A newly configured IGMP Snooping clears all existing fast leave configurations.

l The igmp-snooping fast-leave command is useless if you do not enable IGMP Snooping globally. (You can enable IGMP Snooping globally by executing the igmp-snooping enable command in system view.)

l When you configure IGMP Snooping fast leave on aggregation ports, the configuration takes effect only on primary aggregation ports.

l If you add an IGMP V1 host of the same multicast group to the port, the switch does not remove the port when the port receives an IGMP Leave packet of the multicast group even you enable IGMP Snooping fast leave for the port.

Fast leave is disabled by default.

Related commands: igmp-snooping.

Examples

# Enable IGMP Snooping fast leave on Ethernet2/1/1 for VLAN 5, VLAN 7, VLAN 8, VLAN 30 through VLAN 40, and VLAN 50.

<H3C> system-view

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

[H3C] interface Ethernet2/1/1

[H3C-Ethernet2/1/1] igmp-snooping fast-leave vlan 5 7 to 8 30 to 40 50

# Enable IGMP Snooping fast leave for all Ethernet ports except those in VLAN 5.

<H3C> system-view

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

[H3C] igmp-snooping fast-leave

[H3C] undo igmp-snooping fast-leave vlan 5

1.1.8 igmp-snooping group-policy

Syntax

igmp-snooping group-policy acl-number

undo igmp-snooping group-policy

View

VLAN view

Parameters

acl-number: Number of basic ACL, in the range of 2,000 to 2,999.

Description

Use the igmp-snooping group-policy command to configure the filtering rule of multicast groups on a specified VLAN so as to control the access to IP multicast groups. You can configure only one ACL rule for each VLAN, and the new configured rule will replace the old one.

Use the undo igmp-snooping group-policy command to remove the configuration.

By default, no filtering rule is set in a VLAN. In this case, a host can join any multicast group.

If an ACL is configured in a VLAN to filter multicast groups, hosts can join only those multicast groups that are permitted to join.

Examples

# Create ACL2001 and configure the rule for basic ACL, using the source IP address as the destination multicast address.

<H3C> system-view

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

[H3C]acl number 2001

[H3C-acl-basic-2001]rule 0 permit source 224.1.1.1 0

[H3C-acl-basic-2001]quit

# Create VLAN 2.

<H3C> system-view

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

[H3C] vlan 2

# Configure the filtering rule of multicast groups in VLAN 2.

[H3C-vlan2] igmp-snooping group-policy 2001

1.1.9 igmp-snooping host-aging-time

igmp-snooping host-aging-time seconds

undo igmp-snooping host-aging-time

System view

Parameters

seconds: Port aging time for the multicast group member, ranging from 200 to 1000 seconds. By default, it is 260 seconds.

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

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

This command is used to set the aging time of the multicast group member so that the refresh frequency can be controlled. When the group members change frequently, the aging time should be comparatively short, and vice versa.

Related commands: igmp-snooping.

Examples

# Set the aging time 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 host-port vlan

Syntax

igmp-snooping host-port vlan { all | vlan-id }

undo igmp-snooping host-port vlan { all | vlan-id }

View

Ethernet port view

Parameters

all: Specifies all VLANs.

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

Description

Use the igmp-snooping host-port vlan command to enable the host port function on the port.

Use the undo igmp-snooping host-port vlan command to disable the function on the port.

By default, the host port function is disabled.

Examples

# Enable the host port function on Ethernet 5/1/1 for all VLANs.

<H3C> system-view

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

[H3C] interface ethernet 5/1/1

[H3C-Ethernet5/1/1] igmp-snooping host-port vlan all

1.1.11 igmp-snooping max-response-time

igmp-snooping max-response-time seconds

undo igmp-snooping max-response-time

System view

Parameters

seconds: Maximum response time for a query, ranging from 1 to 25 seconds. By default, it is 1 second.

Use the igmp-snooping max-response-time command to configure the maximum response time for a query.

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

The set maximum response time decides the time limit for the switch to respond to IGMP Snooping query packets.

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

Examples

# Set the maximum response time for the IGMP Snooping packet to 15s.

<H3C> system-view

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

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

1.1.12 igmp-snooping nonflooding-enable

Syntax

igmp-snooping nonflooding-enable

undo igmp-snooping nonflooding-enable

View

System view

Parameters

None

Description

Use the igmp-snooping nonflooding-enable command to suppress flooding of unknown multicast data packets within their respective VLANs.

Use the undo igmp-snooping nonflooding-enable command to restore the default.

Note that if IGMP Snooping is not enabled on the VLAN (nor Layer 3 multicast), unknown multicast packets are flooded within their respective VLANs no matter whether this function is enabled or not. To suppress flooding of unknown multicast data packets within their respective VLANs, you need to enable IGMP Snooping in the VLANs and enable igmp-snooping nonflooding-enable globally.

By default, unknown multicast data packets are flooded within their respective VLANs.

Examples

# Enable the device to suppress flooding of unknown multicast packets within their respective VLANs.

<H3C> system-view

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

[H3C] igmp-snooping nonflooding-enable

1.1.13 igmp-snooping router-aging-time

igmp-snooping router-aging-time seconds

undo igmp-snooping router-aging-time

System view

Parameters

seconds: Router port aging time, ranging from 1 to 1000 measured in seconds; By default, it is 260.

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

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

The port here refers to the Ethernet switch port connected to the multicast router. The Layer-2 Ethernet switch receives general query packets from the router via this port. The timer should be set to about 3.5 times of the general query period of the router.

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

Examples

# Set the aging time of the IGMP Snooping 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