IP multicast boundaries

The IP multicast boundary feature is designed to selectively allow or disallow multicast flows to configured interfaces.

The ip multicast-boundary command allows you to configure a boundary on a PIM enabled interface by defining which multicast groups may not forward packets over a specified interface. This includes incoming and outgoing packets. By default, all interfaces that are enabled for multicast are eligible to participate in a multicast flow provided they meet the multicast routing protocol’s criteria for participating in a flow.