Accepting IGMP Reports from Remote Subnetworks

By default, IGMP interfaces accept IGMP reports only from associated subnetworks. You can configure the router to accept IGMP reports from subnetworks that are not associated with its interfaces. The igmp promiscuous command in Router Configuration mode specifies whether interfaces on the router can accept IGMP reports from indirectly connected subnets. To override this global setting on a particular interface, use the ip igmp promiscuous command in Interface Configuration mode.

Example

In the following example, the router is configured to accept IGMP reports from indirectly connected subnets on all interfaces. The interface on port 0 of the line module in slot 4 is then configured to accept IGMP reports only from directly connected subnets.

igmp promiscuous

• Use to enable all IGMP interfaces on the router to accept IGMP reports from hosts on any subnetwork.
• Example

  host1:boston(config-router)#igmp promiscuous

• Use the no version to enable IGMP interfaces on the router to accept IGMP reports only from hosts on their associated subnetworks.
• See igmp promiscuous.

ip igmp promiscuous

• Use to specify whether the interface accepts IGMP reports from hosts on any subnetwork.
  • Use the on keyword to enable the interface to accept IGMP reports from hosts on any subnetwork.
  • Use the off keyword to enable the interface to accept IGMP reports only from hosts on subnetworks associated with this interface.
• Example

  host1:boston(config-if)#ip igmp promiscuous on

• Use the no version to configure an IGMP interface to use the Router Configuration mode setting to determine the subnetworks from which it can accept IGMP reports.
• See ip igmp promiscuous.

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