To add downstream interfaces to an IGMP proxy tree, use the ip igmp-proxy command in Interface Configuration mode. To remove downstream from interfaces to an IGMP proxy tree, use the no form of this command.

Syntax

ip igmp-proxy upstream-interface-id

no ip igmp-proxy

Parameters

• upstream-interface-id—Upstream Interface identifier.

Default Configuration

The protocol is disabled on the interface.

Command Mode

Interface Configuration mode

User Guidelines

Use the ip igmp-proxy command to add downstream interfaces to an IGMP proxy tree. If the proxy tree does not exist it is created.

Use the no format of the command to remove the downstream interface. When the last downstream interface is removed from the proxy tree it is deleted too.

To disable forwarding of IP Multicast traffic from downstream interfaces, use the ip igmp-proxy downstream protected command in Global Configuration mode. To allow forwarding from downstream interfaces, use the no form of this command.

Syntax

ip igmp-proxy downstream protected

no ip igmp-proxy downstream protected

Parameters

This command has no arguments or keywords.

Default Configuration

Forwarding from downstream interfaces is allowed.

Command Mode

Global Configuration mode

User Guidelines

Use the ip igmp-proxy downstream protected command to block forwarding from downstream interfaces.

Example

The following example prohibits forwarding from downstream interfaces:

switchxxxxxx(config)# ip igmp-proxy downstream protected

To disable or enable forwarding of IP Multicast traffic from a given downstream interface, use the ip igmp-proxy downstream protected interface command in Interface Configuration mode. To return to default, use the no form of this command.

Syntax

ip igmp-proxy downstream protected interface {enabled | disabled}

no ip igmp-proxy downstream protected interface

Parameters

• enabled—Downstream interface protection on the interface is enabled. IPv4 Multicast traffic arriving on the interface will not be forwarded.

• disabled—Downstream interface protection on the interface is disabled. IPv4 Multicast traffic arriving on the interface will be forwarded.

Default Configuration

Global downstream protection configuration (see the ip igmp-proxy downstream protected command)

Command Mode

Interface Configuration mode

User Guidelines

Use the ip igmp-proxy downstream protected interface disabled command to block forwarding from the given downstream interface.

Use the ip igmp-proxy downstream protected interface enabled command to allow forwarding from the given downstream interface.

The command can be configured only for a downstream interface. When a downstream interface is removed from the IGMP Proxy tree the configuration is removed too.

Example

The following example prohibits forwarding from downstream interface vlan 100:

switchxxxxxx(config)# interface vlan100
switchxxxxxx(config-if)# ip igmp-proxy downstream protected interface enabled
switchxxxxxx(config-if)# exit

To define the Source Specific Multicast (SSM) range of IP Multicast addresses, use the ip igmp-proxy ssm command in Global Configuration mode. To disable the SSM range, use the no form of this command.

Syntax

ip igmp-proxy ssm {default | range access-list}

no ip igmp-proxy ssm

Parameters

• default—Defines the SSM range access list to 232.0.0.0/8 (see rfc4607).

• range access-list—Specifies the standard IP access list name defining the SSM range.

Default Configuration

The command is disabled.

Command Mode

Global Configuration mode

User Guidelines

A new ip igmp-proxy ssm command overrides the previous ip igmp-proxy ssm command.

Use the no ip igmp-proxy ssm command to remove all defined ranges.

Example

The following example shows how to configure SSM service for the default IP address range and the IP address ranges defined by access list list1:

switchxxxxxx(config)# ip access-list list1 permit 224.2.151.0/24
switchxxxxxx(config)# ip access-list list1 deny 224.2.152.141
switchxxxxxx(config)# ip access-list list1 permit 224.2.152.0/24
switchxxxxxx(config)# ip igmp-proxy ssm range list1

To display information about interfaces configured for IGMP Proxy, use the show ip igmp-proxy interface command in User EXEC mode or Privileged EXEC mode.

Syntax

show ip igmp-proxy interface [interface-id]

Parameters

• interface-id—(Optional) Display IGMP Proxy information about the interface.

Command Mode

User EXEC mode

Privileged EXEC mode

User Guidelines

The show ip igmp-proxy interface command is used to display all interfaces where the IGMP Proxy is enabled or to display the IGMP Proxy configuration for a given interface.