ip igmp snooping (Global)

Created by Sinan KizarLast updated 28 Mar , 2019

To enable Internet Group Management Protocol (IGMP) snooping, use the ip igmp snooping command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax ip igmp snooping no ip igmp snooping

Default Configuration Disabled.

Command Mode

Global Configuration mode

Example

The following example enables IGMP snooping.

switchxxxxxx(config)# ip igmp snooping

ip igmp snooping vlan

Created by Sinan KizarLast updated 28 Mar , 2019

To enable IGMP snooping on a specific VLAN, use the ip igmp snooping vlan command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id

no ip igmp snooping vlan vlan-id

Parameters

• vlan-id—Specifies the VLAN.

Default Configuration

Disabled

Command Mode

Global Configuration mode

User Guidelines

IGMP snooping can be enabled only on static VLANs.

IGMPv1, IGMPv2, and IGMPv3 Snooping are supported.

To activate IGMP snooping, bridge multicast filtering must be enabled by the bridge multicast filtering command.

The user guidelines of the bridge multicast mode command describes the configuration that is written into the FDB as a function of the FDB mode and the IGMP version that is used in the network.

Example

switchxxxxxx(config)# ip igmp snooping vlan 2

ip igmp snooping vlan mrouter

Created by Sinan KizarLast updated 28 Mar , 2019

To enable automatic learning of Multicast router ports on a VLAN, use the ip igmp snooping vlan mrouter command in Global Configuration mode. To remove the configuration, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id mrouter learn pim-dvmrp no ip igmp snooping vlan vlan-id mrouter learn pim-dvmrp

Parameters

• vlan-id—Specifies the VLAN.

Default Configuration

Learning pim-dvmrp is enabled.

Command Mode

Global Configuration mode

User Guidelines

Multicast router ports are learned according to:

• Queries received on the port
• PIM/PIMv2 received on the port
• DVMRP received on the port
• MRDISC received on the port
• MOSPF received on the port

You can execute the command before the VLAN is created.

Example

switchxxxxxx(config)# ip igmp snooping vlan 1 mrouter learn pim-dvmrp

ip igmp snooping vlan mrouter interface

Created by Sinan KizarLast updated 28 Mar , 2019

To define a port that is connected to a Multicast router port, use the ip igmp snooping mrouter interface command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id mrouter interface interface-list no ip igmp snooping vlan vlan-id mrouter interface interface-list

Parameters

• vlan-id—Specifies the VLAN.
• interface-list—Specifies the list of interfaces. The interfaces can be one of the following types: Ethernet port or Port-channel.

Default Configuration

No ports defined

Command Mode

Global Configuration mode

User Guidelines

A port that is defined as a Multicast router port receives all IGMP packets (reports and queries) as well as all Multicast data.

You can execute the command before the VLAN is created.

Example

switchxxxxxx(config)# ip igmp snooping vlan 1 mrouter interface te1/0/1

ip igmp snooping vlan forbidden mrouter

Created by Sinan KizarLast updated 28 Mar , 2019

To forbid a port from being defined as a Multicast router port by static configuration or by automatic learning, use the ip igmp snooping vlan forbidden mrouter command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id forbidden mrouter interface interface-list no ip igmp snooping vlan vlan-id forbidden mrouter interface interface-list

Parameters

• vlan-id—Specifies the VLAN.
• interface-list—Specifies a list of interfaces. The interfaces can be of one of the following types: Ethernet port or Port-channel.

Default Configuration

No ports defined.

Command Mode

Global Configuration mode

User Guidelines

A port that is a forbidden mrouter port cannot be a Multicast router port (i.e. cannot be learned dynamically or assigned statically).

You can execute the command before the VLAN is created.

Example

switchxxxxxx(config)# ip igmp snooping vlan 1 forbidden mrouter interface te1/0/1

ip igmp snooping vlan static

Created by Sinan KizarLast updated 28 Mar , 2019

To register an IP-layer Multicast address to the bridge table, and to add static ports to the group defined by this address, use the ip igmp snooping vlan static command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id static ip-address [interface interface-list] no ip igmp snooping vlan vlan-id static ip-address [interface interface-list]

Parameter

• vlan-id—Specifies the VLAN.
• ip-address—Specifies the IP Multicast address.
• interface interface-list—(Optional) Specifies a list of interfaces. The interfaces can be of one of the following types: Ethernet port or Port-channel.

Default Configuration

No Multicast addresses are defined.

Command Mode

Global Configuration mode

User Guidelines

Static Multicast addresses can only be defined on static VLANs.

You can execute the command before the VLAN is created.

You can register an entry without specifying an interface.

Using the no command without a port-list removes the entry.

Example

switchxxxxxx(config)# ip igmp snooping vlan 1 static 239.2.2.2 interface te1/0/1

Verge Documentation – English//IGMP Snooping Commands

Angora Networks Product Support Portal

ip igmp snooping vlan multicast-tv

Created by Sinan KizarLast updated 28 Mar , 2019

To define the Multicast IP addresses that are associated with a Multicast TV VLAN, use the ip igmp snooping vlan multicast-tv command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id multicast-tv ip-multicast-address [count number] no ip igmp snooping vlan vlan-id multicast-tv ip-multicast-address [count number]

Parameters

• vlan-id—Specifies the VLAN
• ip-multicast-address—Multicast IP address
• count number—(Optional) Configures multiple contiguous Multicast IP addresses. If not specified, the default is 1. (Range: 1–256)

Default Configuration

No Multicast IP address is associated.

Command Mode

Global Configuration mode

User Guidelines

Use this command to define the Multicast transmissions on a Multicast-TV VLAN. The configuration is only relevant for an Access port that is a member in the configured VLAN as a Multicast-TV VLAN.

If an IGMP message is received on such an Access port, it is associated with the Multicast-TV VLAN only if it is for one of the Multicast IP addresses that are associated with the Multicast-TV VLAN.

Up to 256 VLANs can be configured.

Example

switchxxxxxx(config)# ip igmp snooping vlan 1 multicast-tv 239.2.2.2 count 3

ip igmp snooping map cpe vlan

Created by Sinan KizarLast updated 28 Mar , 2019

To map CPE VLANs to Multicast-TV VLANs, use the ip igmp snooping map cpe vlan command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping map cpe vlan cpe-vlan-id multicast-tv vlan vlan-id no ip igmp snooping map cpe vlan vlan-id

Parameters

• cpe-vlan-id—Specifies the CPE VLAN ID.
• vlan-id—Specifies the Multicast-TV VLAN ID.

Default Configuration No mapping exists.

Command Mode

Global Configuration mode

User Guidelines

Use this command to associate the CPE VLAN with a Multicast-TV VLAN.

If an IGMP message is received on a customer port tagged with a CPE VLAN, and there is mapping from that CPE VLAN to a Multicast-TV VLAN, the IGMP message is associated with the Multicast-TV VLAN.

Example

The following example maps CPE VLAN 2 to Multicast-TV VLAN 31.

switchxxxxxx(config)# ip igmp snooping map cpe vlan 2 multicast-tv vlan 31

ip igmp snooping querier

Created by Sinan KizarLast updated 28 Mar , 2019

To enable globally the IGMP Snooping querier, use the ip igmp snooping querier command in Global Configuration mode. To disable the IGMP Snooping querier globally, use the no form of this command.

Syntax

ip igmp snooping querier no ip igmp snooping querier

Parameters

N/A

Default Configuration

Enabled

Command Mode

Global Configuration mode

User Guidelines

To run the IGMP Snooping querier on a VLAN, you have enable it globally and on the VLAN.

Example

The following example disables the IGMP Snooping querier globally:

switchxxxxxx(config)# no ip igmp snooping querier

ip igmp snooping vlan querier

Created by Sinan KizarLast updated 28 Mar , 2019

To enable the IGMP Snooping querier on a specific VLAN, use the ip igmp snooping vlan querier command in Global Configuration mode. To disable the IGMP Snooping querier on the VLAN interface, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id querier no ip igmp snooping vlan vlan-id querier

Parameters

• vlan-id—Specifies the VLAN.

Default Configuration

Disabled

Command Mode

Global Configuration mode

User Guidelines

The IGMP Snooping querier can be enabled on a VLAN only if IGMP Snooping is enabled for that VLAN.

Example

The following example enables the IGMP Snooping querier on VLAN 1:

switchxxxxxx(config)# ip igmp snooping vlan 1 querier

ip igmp snooping vlan querier address

Created by Sinan KizarLast updated 28 Mar , 2019

To define the source IP address that the IGMP snooping querier uses, use the ip igmp snooping vlan querier address command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id querier address ip-address no ip igmp snooping vlan vlan-id querier address

Parameters

• vlan-id—Specifies the VLAN.
• ip-address—Source IP address.

Default Configuration

If an IP address is configured for the VLAN, it is used as the source address of the IGMP snooping querier. If there are multiple IP addresses, the minimum IP address defined on the VLAN is used.

Command Mode

Global Configuration mode

User Guidelines

If an IP address is not configured by this command, and no IP address is configured for the querier’s VLAN, the querier is disabled.

Example

switchxxxxxx(config)# ip igmp snooping vlan 1 querier address 10.5.234.205

ip igmp snooping vlan querier election

Created by Sinan KizarLast updated 28 Mar , 2019

To enable IGMP Querier election mechanism of an IGMP Snooping querier on a specific VLAN, use the ip igmp snooping vlan querier election command in Global Configuration mode. To disable Querier election mechanism, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id querier election no ip igmp snooping vlan vlan-id querier election

Parameters

• vlan-id—Specifies the VLAN.

Default Configuration

Enabled

Command Mode

Global Configuration mode

User Guidelines

Use the no form of the ip igmp snooping vlan querier election command to disable IGMP Querier election mechanism on a VLAN.

If the IGMP Querier election mechanism is enabled, the IGMP Snooping querier supports the standard IGMP Querier election mechanism specified in RFC2236 and RFC3376.

If IGMP Querier election mechanism is disabled, IGMP Snooping Querier delays sending General Query messages for 60 seconds from the time it was enabled. During this time, if the switch did not receive an IGMP query from another Querier  – it starts sending General Query messages. Once the switch acts as a Querier, it will stop sending General Query messages if it detects another Querier on the VLAN. In this case, the switch will resume sending General Query messages if it does hear another Querier for Query Passive interval that equals to

                            <Robustness>*<Query Interval> + 0.5*<Query Response Interval).

See the ip igmp robustness, ip igmp query-interval, and ip igmp query-max-response-time commands for configurations of these parameters.

It is recommended to disable IGMP Querier election mechanism if there is an IPM Multicast router on the VLAN.

Example

The following example disables IGMP Snooping Querier election on VLAN 1:

switchxxxxxx(config)# no ip igmp snooping vlan 1 querier election

ip igmp snooping vlan querier version

Created by Sinan KizarLast updated 28 Mar , 2019

To configure the IGMP version of an IGMP Snooping querier on a specific VLAN, use the ip igmp snooping vlan querier version command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id querier version {2 | 3} no ip igmp snooping vlan vlan-id querier version

Parameters

• vlan-id—Specifies the VLAN.
• querier version 2—Specifies that the IGMP version would be IGMPv2.
• querier version 3—Specifies that the IGMP version would be IGMPv3.

Default Configuration IGMPv2.

Command Mode

Global Configuration mode

Example

The following example sets the version of the IGMP Snooping Querier VLAN 1 to 3:

switchxxxxxx(config)# ip igmp snooping vlan 1 querier version 3

ip igmp snooping vlan immediate-leave

Created by Sinan KizarLast updated 28 Mar , 2019

To enable the IGMP Snooping Immediate-Leave processing on a VLAN, use the ip igmp snooping vlan immediate-leave Global Configuration mode command in Global Configuration mode. To return to the default, use the no form of this command.

Syntax

ip igmp snooping vlan vlan-id immediate-leave

no ip igmp snooping vlan vlan-id immediate-leave

Parameters

• vlan-id—Specifies the VLAN ID value. (Range: 1–4094).

Default Configuration

Disabled

Command Mode

Global Configuration mode

User Guidelines

You can execute the command before the VLAN is created.

Example

The following example enables IGMP snooping immediate-leave feature on VLAN

1.

switchxxxxxx(config)# ip igmp snooping vlan 1 immediate-leave

show ip igmp snooping cpe vlans

Created by Sinan KizarLast updated 28 Mar , 2019

To display the CPE VLAN to Multicast TV VLAN mappings, use the show ip igmp snooping cpe vlans command in User EXEC mode.

Syntax

show ip igmp snooping cpe vlans [vlan vlan-id]

Parameters

• vlan vlan-id —(Optional) Specifies the CPE VLAN ID.

Command Mode User EXEC mode

Example

The following example displays the CPE VLAN to Multicast TV VLAN mappings.

switchxxxxxx# show ip igmp snooping cpe vlans CPE VLAN Multicast-TV VLAN -------- ------------------ 11181119

show ip igmp snooping groups

Created by Sinan KizarLast updated 28 Mar , 2019

To display the Multicast groups learned by the IGMP snooping, use the show ip igmp snooping groups command in User EXEC mode.

Syntax

show ip igmp snooping groups [vlan vlan-id] [address ip-multicast-address] [source ip-address]

Parameters

• vlan vlan-id—(Optional) Specifies the VLAN ID.
• address ip-multicast-address—(Optional) Specifies the IP multicast address.
• source ip-address—(Optional) Specifies the IP source address.

Command Mode

User EXEC mode

User Guidelines

To see all Multicast groups learned by IGMP snooping, use the show ip igmp snooping groups command without parameters.

Use the show ip igmp snooping groups command with parameters to see a needed subset of all Multicast groups learned by IGMP snooping

To see the full Multicast address table (including static addresses), use the show bridge multicast address-table command.

Example

The following example shows sample output:

switchxxxxxx# show ip igmp snooping groups vlan 1 switchxxxxxx# show ip igmp snooping groups

Vlan—-1

GroupAddress—————239.255.255.250

SourceAddress———-*

Include Ports——–te1/0/1

Exclude Ports——–

Comp-Mode——–v2

show ip igmp snooping interface

Created by Sinan KizarLast updated 28 Mar , 2019

To display the IGMP snooping configuration for a specific VLAN, use the show ip igmp snooping interface command in User EXEC mode.

Syntax

show ip igmp snooping interface vlan-id

Parameters

• vlan-id—Specifies the VLAN ID.

Command Mode

User EXEC mode

Example

The following example displays the IGMP snooping configuration for VLAN 1000

switchxxxxxx# show ip igmp snooping interface 1000   IGMP Snooping is globally enabled   IGMP Snooping Querier is globally enabled   VLAN 1000   IGMP Snooping is enabled   IGMP snooping last immediate leave: enable   Automatic learning of Multicast router ports is enabled   IGMP Snooping Querier is enabled   IGMP Snooping Querier operation state: is running   IGMP Snooping Querier version: 2   IGMP Snooping Querier election is enabled   IGMP Snooping Querier address: 194.12.10.166   IGMP snooping robustness: admin 2  oper 2   IGMP snooping query interval: admin 125 sec oper 125 sec   IGMP snooping query maximum response: admin 10 sec oper 10 sec   IGMP snooping last member query counter: admin 2 oper 2   IGMP snooping last member query interval: admin 1000 msec oper 500 msec   Groups that are in IGMP version 1 compatibility mode:   231.2.2.3, 231.2.2.3

show ip igmp snooping mrouter

Created by Sinan KizarLast updated 28 Mar , 2019

To display information on dynamically learned Multicast router interfaces for all VLANs or for a specific VLAN, use the show ip igmp snooping mrouter command in User EXEC mode.

Syntax

show ip igmp snooping mrouter [interface vlan-id]

Parameters

• interface vlan-id—(Optional) Specifies the VLAN ID.

Command Mode

User EXEC mode

Example

The following example displays information on dynamically learned Multicast router interfaces for VLAN 1000:

switchxxxxxx# show ip igmp snooping mrouter interface 1000

VLAN —1000

Dynamic ——–te1/0/1

Static ——–te1/0/2

Forbidden ———te1/0/3-4

show ip igmp snooping multicast-tv

Created by Sinan KizarLast updated 28 Mar , 2019

To display the IP addresses associated with Multicast TV VLANs, use the show ip igmp snooping multicast-tv EXEC mode command in User EXEC mode.

Syntax

show ip igmp snooping multicast-tv [vlan vlan-id]

Parameters

• vlan vlan-id—(Optional) Specifies the VLAN ID.

Command Mode

User EXEC mode

Example

The following example displays the IP addresses associated with all Multicast TV VLANs.

switchxxxxxx# show ip igmp snooping multicast-tv  VLAN IP Address  ---- ---------- 1000 239.255.0.0 1000 239.255.0.1 1000 239.255.0.2 1000 239.255.0.3 1000 239.255.0.4 1000 239.255.0.5 1000 239.255.0.6 1000 239.255.0.7