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Accepting IGMP Messages from Remote Subnetworks

By default, IGMP interfaces accept IGMP messages only from the same subnet. Including the promiscuous-mode statement enables the routing device to accept IGMP messages from indirectly connected subnets.

Note: When you enable IGMP on an unnumbered Ethernet interface that uses a /32 loopback address as a donor address, you must configure IGMP promiscuous mode to accept the IGMP packets received on this interface.

Note: When enabling promiscuous-mode, all routers on the ethernet segment must be configured with the promiscuous mode statement. Otherwise, only the interface configured with lowest IPv4 address acts as the querier for IGMP for this Ethernet segment.

To enable IGMP promiscuous mode on an interface:

  1. Configure the IGMP interface.
    [edit protocols igmp]user@host# set interface ge-0/1/1.0 promiscuous-mode
  2. Verify the configuration by checking the Promiscuous Mode field in the output of the show igmp interface command.
  3. Verify the operation of the filter by checking the Rx non-local field in the output of the show igmp statistics command.
 

Related Documentation

 

Published: 2013-01-17

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